JavaScript Alphabetical Reference
| Property/Method | Belongs To | Description |
|---|---|---|
| abs() | Math | Returns the absolute value of x |
| abs() | Duration | Returns a Duration with the absolute value of a Duration |
| accessKey | HTML Element | Sets or returns the accesskey attribute of an element |
| acos() | Math | Returns the arccosine of x in radians |
| acosh() | Math | Returns the hyperbolic arccosine of x |
| activeElement | HTML Document | Returns the currently focused element in the document |
| add() | Duration | Returns a Duration with a Duration added |
| add() | Instant | Returns an Instant with a Duration added |
| add() | PlainDate | Returns a PlainDate with a Duration added |
| add() | PlainDateTime | Returns a PlainDateTime with a Duration added |
| add() | PlainTime | Returns a PlainTime with a Duration added |
| add() | PlainYearMonth | Returns a PlainYearMonth with a Duration added |
| add() | Set | Adds a new element to a det |
| add() | ZonedDateTime | Adds a Duration to a ZonedDateTime |
| add() | DOMTokenList | Adds one (or more) tokens to a DOMTokenList |
| addEventListener() | HTML Document | Attaches an event handler to a document |
| addEventListener() | HTML Element | Attaches an event handler to an element |
| adoptNode() | HTML Document | Adopts a node from another document |
| after() | HTML Element | Inserts one or more nodes (elements) or strings after an element |
| alert() | Window Object | Displays an alert box with a message and an OK button |
| all() | Promise | Returns a single Promise from a list of promises, when all promises fulfill |
| allSettled() | Promise | Returns a single Promise from a list of promises, when all promises are settled |
| altKey | MouseEvent KeyboardEvent TouchEvent |
Returns whether the "ALT" key was pressed when the mouse event was triggered |
| anchors | HTML Document | Returns a collection of all <a> elements in the document that have a name attribute |
| animationName | AnimationEvent | Returns the name of the animation |
| any() | Promise | Returns a single Promise from a list of promises, when any promise fulfills |
| appCodeName | Navigator | Returns the code name of the browser |
| append() | HTML Element | Appends one or several nodes (element) or strings after the the last child of an element |
| appendChild() | HTML Element | Adds a new child node, to an element, as the last child node |
| applets | HTML Document | Returns a collection of all <applet> elements in the document |
| apply() | Function | Calls a function with a given this value |
| apply() | Proxy | A trap for the [[Call]] internal method |
| apply() | Reflect | Calls a function with arguments |
| appName | Navigator | Returns the name of the browser |
| appVersion | Navigator | Returns the version information of the browser |
| asin() | Math | Returns the arcsine of x, in radians |
| asinh() | Math | Returns the hyperbolic arcsine of x |
| assert() | Console | Writes an error message to the console if the assertion is false |
| assign() | Window Object | Loads a new document |
| assign() | Objects | Copies properties from an object(s) to a target object |
| at() | Array | Returns an indexed element from an array |
| at() | String | Returns an indexed element from a string |
| at() | Typed Array | Returns an indexed element from a typed array |
| addEventlistener() | Window Object | Attaches an event handler to a window |
| addEventListener() | HTML Elements | Attaches an event handler to an element |
| atan() | Math | Returns the arctangent of x as a numeric value between -PI/2 and PI/2 radians |
| atan2() | Math | Returns the arctangent of the quotient of its arguments |
| atanh() | Math | Returns the hyperbolic arctangent of x |
| atob() | Window Object | Decodes a base-64 encoded string |
| attributes | HTML Element | Returns a NamedNodeMap of an element's attributes |
| availHeight | Screen | Returns the height of the screen (excluding the Windows Taskbar) |
| availWidth | Screen | Returns the width of the screen (excluding the Windows Taskbar) |
| back() | History | Loads the previous URL in the history list |
| baseURI | HTML Document | Returns the absolute base URI of a document |
| before() | HTML Element | Inserts nodes (elements) immediately before an element |
| BigInt64Array | Typed Arrays | Typed array of 64-bit signed integers |
| BigUint64Array | Typed Arrays | Typed array of 64-bit un signed integers |
| bind() | Function | Returns a new Function with a specific value of this |
| blur() | HTML Element | Removes focus from an element |
| blur() | Window Object | Removes focus from a window |
| body | HTML Document | Sets or returns the document's body (the <body> element) |
| Boolean() | Boolean | Returns a Boolean |
| break | Statements | Exits a switch or a loop |
| btoa() | Window Object | Encodes a string in base-64 |
| bubbles | Event | Returns whether or not a specific event is a bubbling event |
| button | MouseEvent | Returns which mouse button was pressed |
| buttons | MouseEvent | Returns which mouse buttons were pressed |
| byteLength | Typed Array | Returns the length (in bytes) of a typed array |
| byteOffset | Typed Array | Returns the offset of a typed array from the start of its ArrayBuffer |
| bytesPerElement | Typed Array | Returns the number of bytes used per element in a typed array |
| cancelable | Event | Returns whether or not an event can have its default action prevented |
| call() | Function | Calls a function with a given this value |
| catch() | Promise | A callback function to run when a promise is rejected |
| cause | Error | Sets or Returns the cause of an error |
| cbrt() | Math | Returns the cubic root of x |
| ceil() | Math | Returns x, rounded upwards to the nearest integer |
| changeTouches | TouchEvent | Returns a list of all the touch objects whose state changed between the previous touch and this touch |
| characterSet | HTML Document | Returns the character encoding for the document |
| charAt() | String | Returns the character at the specified index (position) |
| charCode | KeyboardEvent | Returns the Unicode character code of the key that triggered the onkeypress event |
| charCodeAt() | String | Returns the Unicode of the character at the specified index |
| charset | HTML Document | Deprecated. Use characterSet instead. |
| childElementCount | HTML Element | Returns the number of child elements an element has |
| childNodes | HTML Element | Returns a collection of an element's child nodes (including text and comment nodes) |
| children | HTML Element | Returns a collection of an element's child element (excluding text and comment nodes) |
| classList | HTML Element | Returns the class name(s) of an element |
| class | Statements | Declares a class |
| className | HTML Element | Sets or returns the value of the class attribute of an element |
| clear() | Console | Clears the console |
| clear() | API Storage | Clears (removes) all storage objects for this domain |
| clear() | Maps | Clears (removes) all elements from a map |
| clear() | Set | Clears (removes) all elements from a set |
| clearInterval() | Window Object | Clears a timer set with setInterval() |
| clearTimeout() | Window Object | Clears a timer set with setTimeout() |
| clearWatch() | Geolocation | Unregister location/error monitoring handlers previously installed using Geolocation.watchPosition() |
| click() | HTML Element | Simulates a mouse-click on an element |
| clientHeight | HTML Element | Returns the height of an element, including padding |
| clientLeft | HTML Element | Returns the width of the left border of an element |
| clientTop | HTML Element | Returns the width of the top border of an element |
| clientWidth | HTML Element | Returns the width of an element, including padding |
| clientX | MouseEvent TouchEvent |
Returns the horizontal coordinate of the mouse pointer, relative to the current window, when the mouse event was triggered |
| clientY | MouseEvent TouchEvent |
Returns the vertical coordinate of the mouse pointer, relative to the current window, when the mouse event was triggered |
| clipboardData | ClipboardData | Returns an object containing the data affected by the clipboard operation |
| cloneNode() | HTML Element | Creates a copy of a node, and returns the clone |
| closed | Window Object | Returns a boolean value indicating whether a window has been closed or not |
| close() | HTML Document | Closes a document |
| close() | Window Object | Closes a window |
| closest() | HTML Element | Searches up the DOM tree for the closest element which matches a specified CSS selector |
| clz32(x) | Math | Returns the number of leading zeros in a 32-bit binary representation of x |
| code | KeyboardEvent | Returns the code of the key that triggered the event |
| codePointAt() | String | Returns the Unicode value at an index (position) in a string |
| colorDepth | Screen | Returns the bit depth of the color palette for displaying images |
| compare DocumentPosition() |
HTML Element | Compares the document position of two elements |
| compare() | Duration | Returns -1, 0, or 1 if a Duration is less than, equal, or grater than another |
| compare() | Instant | Returns -1, 0, or 1 if an Instant is before, equal, or later than another |
| compare() | PlainDate | Returns -1, 0, or 1 if a PlainDate is before, equal, or later than another |
| compare() | PlainDateTime | Returns -1, 0, or 1 if a PlainDateTime is before, equal, or later than another |
| compare() | PlainTime | Returns -1, 0, or 1 if a PlainTime is before, equal, or later than another |
| compare() | PlainYearMonth | Returns -1, 0, or 1 if a PlainYearMonth is before, equal, or later than another |
| compare() | ZonedDateTime | Returns -1, 0, or 1 if a ZonedDateTime is before, equal, or later than another |
| compile() | RegExp | Deprecated. Compiles a regular expression |
| composed | Event | Returns whether the event is composed or not |
| concat() | Array | Returns two or more joined arrays |
| concat() | String | Returns two or more joined strings |
| confirm() | Window Object | Displays a dialog box with a message and an OK and a Cancel button |
| const | Statements | Declares a variable with a constant value |
| construct() | Proxy | Traps the new operator |
| construct() | Reflect | Constructs a new object (acts like the new operator) |
| constructor() | Classes | Creates and initialize objects created within a class |
| constructor | Array | Returns the function that created the Array prototype |
| constructor | Boolean | Returns the function that created the Boolean prototype |
| constructor | Date | Returns the function that created the Date prototype |
| constructor | Number | Returns the function that created the Number prototype |
| constructor | Object | Returns the function that created the Object prototype |
| constructor | RegExp | Returns the function that created the RegExp prototype |
| constructor | String | Returns the function that created the String prototype |
| contains() | HTML Element | Returns true if a node is a descendant of a node |
| contains() | DOMTokenList | true if a DOMTokenList contains a class |
| contentEditable | HTML Element | Sets or returns whether the content of an element is editable or not |
| continue | Statements | Breaks one iteration (in the loop) if a specified condition occurs, and continues with the next iteration in the loop |
| console | Window Object | Returns a reference to the Console object |
| cookie | HTML Document | Returns all name/value pairs of cookies in the document |
| cookieEnabled | Navigator | Determines whether cookies are enabled in the browser |
| coordinates | Geolocation | Returns the position and altitude of the device on Earth |
| copyWithin() | Array | Copies array elements to another position in the array |
| copyWithin() | Typed Array | Copies typed array elements to another position in the array |
| cos(x) | Math | Returns the cosine of x (x is in radians) |
| cosh(x) | Math | Returns the hyperbolic cosine of x |
| count() | Console | Logs the number of times that this particular call to count() has been called |
| create() | Object | Returns an object created from an existing object |
| createAttribute() | HTML Document | Creates an attribute node |
| createComment() | HTML Document | Creates a Comment node with the specified text |
| create DocumentFragment() |
HTML Document | Creates an empty DocumentFragment node |
| createElement() | HTML Document | Creates an element node |
| createEvent() | HTML Document Event |
Creates a new event |
| createTextNode() | HTML Document | Creates a Text node |
| ctrlKey | MouseEvent KeyboardEvent TouchEvent |
Returns whether the "CTRL" key was pressed when the mouse event was triggered |
| currentTarget | Event | Returns the element whose event listeners triggered the event |
| data | InputEvent | Returns the inserted characters |
| dataTransfer | DragEvent InputEvent |
Returns an object containing the data being dragged/dropped, or inserted/deleted |
| debugger | Statements | Stops the execution of JavaScript, and calls (if available) the debugging function |
| decodeURI() | Global | Decodes a URI |
| decodeURIComponent() | Global | Decodes a URI component |
| defaultPrevented | Event | Returns whether or not the preventDefault() method was called for the event |
| defaultStatus | Window Object | Sets or returns the default text in the statusbar of a window |
| defaultView | HTML Document | Returns the window object associated with a document, or null if none is available. |
| defineProperties() | Object | Adds or changes properties |
| defineProperty() | Object | Adds or changes a property |
| defineProperty() | Proxy | Traps defineProperty() |
| defineProperty() | Reflect | Defines or modifies a property |
| delete | Objects | Deletes a property from an object |
| delete() | Map | Deletes an element from a map |
| delete() | Set | Deletes an element from a set |
| deleteProperty() | Proxy | Traps the delete operator |
| deleteProperty() | Reflect | Deletes a property from an object |
| deltaX | WheelEvent | Returns the horizontal scroll amount of a mouse wheel (x-axis) |
| deltaY | WheelEvent | Returns the vertical scroll amount of a mouse wheel (y-axis) |
| deltaZ | WheelEvent | Returns the scroll amount of a mouse wheel for the z-axis |
| deltaMode | WheelEvent | Returns a number that represents the unit of measurements for delta values (pixels, lines or pages) |
| designMode | HTML Document | Controls whether the entire document should be editable or not. |
| detail | Event | Returns a number that indicates how many times the mouse was clicked |
| difference() | Set | Returns the difference between two sets |
| dir | HTML Element | Sets or returns the value of the dir attribute of an element |
| dir() | Window Console | Displays a list of the properties of a JavaScript object |
| do ... while | Statements | Executes a block of statements and repeats the block while a condition is true |
| doctype | HTML Document | Returns the Document Type Declaration associated with the document |
| document | Window Object | Returns the Document object for the window |
| documentElement | HTML Document | Returns the Document Element of the document (the <html> element) |
| documentMode | HTML Document | Returns the mode used by the browser to render the document |
| documentURI | HTML Document | Sets or returns the location of the document |
| domain | HTML Document | Returns the domain name of the server that loaded the document |
| domConfig | HTML Documents | Deprecated. |
| dotAll | RegExp | Returns true if the s modifier is set in the expression |
| drop() | Iterator | Returns an iterator with a number of elements dropped |
| E | Math | Returns Euler's number (approx. 2.718) |
| elapsedTime | AnimationEvent | Returns the number of seconds an animation has been running |
| elapsedTime | Returns the number of seconds a transition has been running | |
| embeds | HTML Document | Returns a collection of all <embed> elements the document |
| encodeURI() | Global | Encodes a URI |
| encodeURIComponent() | Global | Encodes a URI component |
| endsWith() | String | Checks whether a string ends with specified string/characters |
| entries() | Array | Returns an Iterator with the key/value pairs of an array |
| entries() | Maps | Returns an Iterator with the key/value pairs of a map |
| entries() | Objects | Returns an Iterator with the key/value pairs of an object |
| entries() | Sets | Returns an Iterator with the key/value pairs of a det |
| entries() | Typed Array | Returns an Iterator with the key/value pairs of an array |
| entries() | NodeList | Returns an Iterator with the key/value pairs a NodeList |
| entries() | DOMTokenList | Returns an Iterator with the key/value pairs of a DOMTokenList |
| EPSILON | Number | Returns the difference between 1 and the smallest number |
| equals() | Instant | Returns true if this Instant is equal to another Instant |
| equals() | PlainDate | Returns true if this PlainDate is equal to another PlainDate |
| equals() | PlainDateTime | Returns true if this PlainDateTime is equal to another |
| equals() | PlainMonthDay | Returns true if this PlainMonthDay is equal to another |
| equals() | PlainTime | Returns true if this PlainTime is equal to another PlainTime |
| equals() | PlainYearMonth | Returns true if this PlainYearMonth is equal to another PlainYearMonth |
| equals() | ZonedDateTime | Returns true if this ZonedDateTime is equal to another |
| error() | Console | Outputs an error message to the console |
| escape() | Global | Deprecated.Use encodeURI() instead |
| escape() | RegExp | Returns string where all regular expressions are escaped |
| eval() | Global | Evaluates a string and executes it as if it was script code |
| eventPhase | Event | Returns which phase of the event flow is currently being evaluated |
| every() | Array | Returns true if every element in an array pass a test |
| every() | Iterator | Returns true if every element in an Iterator pass a test |
| every() | Typed Array | Returns true if every element in a Typed Array pass a test |
| exec() | RegExp | Tests for a match in a string. Returns the first match |
| execCommand() | HTML Document | Invokes the specified clipboard operation on the element currently having focus. |
| exitFullscreen() | HTML Element | Cancels an element in fullscreen mode |
| exp(x) | Math | Returns the value of Ex |
| expm1(x) | Math | Returns the value of Ex minus 1 |
| export | Export functions so they can be used for imports in external modules, and other scripts | |
| extends | Classes | Extends a class (inherit) |
| f16round() | Math | Returns the nearest 16-bit floating point representation of a number |
| fill() | Array | Fills all elements in an array with a value |
| fill() | Typed Array | Fills all array elements with a value |
| filter() | Array | Creates a new Array with elements that pass a test |
| filter() | Iterator | Creates a new Iterator with elements that pass a test |
| filter() | Typed Array | Creates a new Typed Array with elements that pass a test |
| finally() | Promise | A callback function to run when a promise is settled |
| find() | Array | Returns the value of the first element in an array that pass a test |
| find() | Iterator | Returns the value of the first element that passes a test |
| find() | Typed Array | Returns the value of the first element that passes a test |
| findIndex() | Array | Returns the index of the first element in an array that pass a test |
| findIndex() | Typed Array | Returns the index of the first element that passes a test |
| findLast() | Array | Returns the value of the last element in an array that pass a test |
| findLast() | Typed Array | Returns the value of the last element that passes a test |
| findLastIndex() | Array | Returns the index of the last element in an array that pass a test |
| findLastIndex() | Typed Array | Returns the index of the last element that passes a test |
| firstChild | HTML Element | Returns the first child node of a node |
| firstElementChild | HTML Element | Returns the first child element of the specified element |
| flags | RegExp | Returns s sting with the flags set in the expression |
| flat() | Array | Concatenates sub-array elements |
| flatMap() | Array | Maps array elements and creates a new flat array |
| flatMap() | Iterators | Maps iterator elements and creates a new flat iterator |
| Float16Array | Typed Arrays | Typed array of 16-bit floating point numbers |
| Float32Array | Typed Arrays | Typed array of 32-bit floating point numbers |
| Float64Array | Typed Arrays | Typed array of 64-bit floating point numbers |
| floor() | Math | Returns x, rounded downwards to the nearest integer |
| focus() | HTML Element | Sets focus to an element |
| focus() | Window Object | Sets focus to a window |
| for | Statements | Marks a code block to execute if a condition is true |
| for ... in | Statements | Marks a code block to execute for each element of an object |
| for...of | Statements | Marks a code block to loop over the values of any iterable |
| forEach() | Array | Calls a function for each Array element |
| forEach() | Iterator | Calls a function for each Iterator element |
| forEach() | Map | Calls a function for each Map element |
| forEach() | Set | Calls a function for each Set element |
| forEach() | Typed Array | Calls a function for each Typed Array element |
| forEach() | NodeList | Calls a function for each NodeList element |
| forEach() | DOMTokenList | Calls a function for each DOMTokenList element |
| forms | HTML Document | Returns a collection of all <form> elements in the document |
| forward() | History | Loads the next URL in the history list |
| frameElement | Window Object | Returns the <iframe> element of the current window |
| frames | Window Object | Returns all <iframe> elements in the current window |
| freeze() | Object | Prevents any changes to an object |
| from() | Array | returns a new Array from an object |
| from() | Iterator | Returns an Iterator from any iterable |
| from() | Duration | Returns a Duration from a Duration or an ISO string |
| from() | Instant | Returns a Instant from an ISO string |
| fromEpochMilliseconds() | Instant | Returns an Instant object from a number of milliseconds |
| fromEpochNanoseconds() | Instant | Returns an Instant object from a number of nanoseconds |
| from() | PlainDate | Returns a PlainDate from an object or an ISO String |
| from() | PlainDateTime | Returns a PlainDateTime from an object or an ISO String |
| from() | PlainMonthDay | Returns a PlainMonthDay from an object or an ISO String |
| from() | PlainTime | Returns a PlainTime from an object or an ISO String |
| from() | PlainYearMonth | Returns a PlainYearMonth from an object or an ISO String |
| from() | Typed Array | Returns a Typed Array from any Object with a length property |
| from() | ZonedDateTime | Returns a ZonedDateTime from an object or an ISO String |
| fromCharCode() | String | Converts Unicode values to characters |
| fromEntries() | Object | Returns an object created from an iterable list of key/value pairs |
| fround() | Math | Returns the nearest float representation of a number |
| fullscreenElement | HTML Document | Returns the current element that is displayed in fullscreen mode |
| fullscreenEnabled() | HTML Document | Returns a boolean value indicating whether the document can be viewed in fullscreen mode |
| function | Statements | Declares a function |
| geolocation | Navigator | Returns a Geolocation object that can be used to locate the user's position |
| get() | Map | Gets the value of a key in a map |
| get() | Proxy | A trap for the internal [[Get]] method |
| get() | Reflect | A trap for the internal [[Get]] method |
| getAttribute() | HTML Element | Returns the specified attribute value of an element node |
| getAttributeNode() | HTML Element | Returns the specified attribute node |
| getBoundingClientRect() | HTML Element | Returns the size of an element and its position relative to the viewport |
| getComputedStyle() | Window Object | Gets the current computed CSS styles applied to an element |
| getCurrentPosition() | Geolocation | Returns the current position of the device |
| getCurrentPosition() | API Geolocation | Returns the current position of the device |
| getDate() | Date | Returns the day of the month (from 1-31) |
| getDay() | Date | Returns the day of the week (from 0-6) |
| getElementById() | HTML Document | Returns the element that has the ID attribute with the specified value |
| getElementsByClassName() | HTML Document | Returns a NodeList containing all elements with the specified class name |
| getElementsByClassName() | HTML Element | Returns a collection of all child elements with a given class name |
| getElementsBy Name() |
HTML Document | Returns a NodeList containing all elements with a specified name |
| getElementsByTagName() | HTML Document | Returns a NodeList containing all elements with the specified tag name |
| getElementsByTagName() | HTML Element | Returns a collection of all child elements with a given tag name |
| getFullYear() | Date | Returns the year |
| getHours() | Date | Returns the hour (from 0-23) |
| getItem() | Storage | Returns the value of the specified key name |
| getMilliseconds() | Date | Returns the milliseconds (from 0-999) |
| getMinutes() | Date | Returns the minutes (from 0-59) |
| getModifierState() | MouseEvent | Returns an array containing target ranges that will be affected by the insertion/deletion |
| getMonth() | Date | Returns the month (from 0-11) |
| getNamedItem() | Attribute | Returns a specified attribute node from a NamedNodeMap |
| getOwnProperty Descriptor() |
Proxy | Returns a property descriptor |
| getOwnProperty Descriptor() |
Reflect | Returns a property descriptor |
| getOwn PropertyDescriptor() |
Object | Returns the property descriptors of an object |
| getOwn PropertyDescriptors() |
Object | Returns the property descriptors of an object |
| getOwn PropertyNames() |
Object | Returns an array with the properties of an object |
| getPrototypeOf() | Proxy | Returns the prototype of an object |
| getPrototypeOf() | Reflect | Returns the prototype of an object |
| getSeconds() | Date | Returns the seconds (from 0-59) |
| getSelection() | Window Object | Returns a Selection object representing the range of text selected by the user |
| getTargetRanges() | InputEvent | Returns an array containing target ranges that will be affected by the insertion/deletion |
| getTime() | Date | Returns the number of milliseconds since midnight Jan 1 1970, and a specified date |
| getTimezoneOffset() | Date | Returns the time difference between UTC time and local time, in minutes |
| getTimeZoneTransition() | ZonedDateTime | Returns a ZonedDateTime representing the closest instant after or before the time zone's UTC offset changes. |
| getUTCDate() | Date | Returns the day of the month, according to universal time (from 1-31) |
| getUTCDay() | Date | Returns the day of the week, according to universal time (from 0-6) |
| getUTCFullYear() | Date | Returns the year, according to universal time |
| getUTCHours() | Date | Returns the hour, according to universal time (from 0-23) |
| getUTCMilliseconds() | Date | Returns the milliseconds, according to universal time (from 0-999) |
| getUTCMinutes() | Date | Returns the minutes, according to universal time (from 0-59) |
| getUTCMonth() | Date | Returns the month, according to universal time (from 0-11) |
| getUTCSeconds() | Date | Returns the seconds, according to universal time (from 0-59) |
| getYear() | Date | Deprecated. Use getFullYear() instead |
| global | RegExp | Checks whether the "g" modifier is set |
| go() | History | Loads a specific URL from the history list |
| group() | Console | Creates a new inline group in the console. This indents following console messages by an additional level, until console.groupEnd() is called |
| groupBy() | Map | Groups iterable elements using values returned from a function |
| groupBy() | Objects | Groups iterable elements using string values returned from a function |
| groupCollapsed() | Console | Creates a new inline group in the console. However, the new group is created collapsed. The user will need to use the disclosure button to expand it |
| groupEnd() | Console | Exits the current inline group in the console |
| has() | Map | Returns true if a key exists in a map |
| has() | Proxy | Intercepts the in operator |
| has() | Reflect | Returns true if a property exists in an object |
| has() | Sets | Returns true if a value exists in a det |
| hasAttribute() | HTML Element | Returns true if an element has the specified attribute, otherwise false |
| hasAttributes() | HTML Element | Returns true if an element has any attributes, otherwise false |
| hasChildNodes() | HTML Element | Returns true if an element has any child nodes, otherwise false |
| hasFocus() | HTML Document | Returns a boolean value indicating whether the document has focus |
| hash | Window Object | Sets or returns the anchor part (#) of a URL |
| hasIndices | RegExp | Returns true if the "d" modifier is set in the expression |
| head | HTML Document | Returns the <head> element of the document |
| height | Screen | Returns the total height of the screen |
| history | Window Object | Returns the History object for the window |
| host | Window Object | Sets or returns the hostname and port number of a URL |
| hostname | Window Object | Sets or returns the hostname of a URL |
| href | Window Object | Sets or returns the entire URL |
| id | HTML Element | Sets or returns the value of the id attribute of an element |
| if ... else ... else if | Statements | Marks a block of statements to be executed depending on a condition |
| ignoreCase | RegExp | Checks whether the "i" modifier is set |
| images | HTML Document | Returns a collection of all <img> elements in the document |
| implementation | HTML Document | Returns the DOMImplementation object that handles this document |
| importNode() | HTML Document | Imports a node from another document |
| in | Operators | Returns true if a property is in a specified object |
| includes() | Array | Returns true if an array includes a specified value |
| includes() | Typed Array | Returns true if a typed array includes a specified value |
| includes() | Strings | Returns true if a string contains a specified value |
| indexOf() | Array | Returns the position of an element in an array |
| indexOf() | Strings | Returns the position of an element in a string |
| indexOf() | Typed Array | Returns the position of an element in a typed array |
| Infinity | Global | A numeric value that represents positive/negative infinity |
| info() | Console | Outputs an informational message to the console |
| innerHeight | Window Object | Returns the height of the window's content area (viewport) including scrollbars |
| innerHTML | HTML Element | Sets or returns the content of an element |
| innerText | HTML Element | Sets or returns the text content of a node and its descendants |
| innerHeight | Window Object | Returns the height of a window's content area (viewport) |
| innerWidth | Window Object | Returns the width of a window's content area (viewport) |
| inputEncoding | HTML Document | Returns the encoding, character set, used for the document |
| inputType | InputEvent | Returns the type of the change (i.e "inserting" or "deleting") |
| insertAdjacentElement() | HTML Element | Inserts a HTML element at the specified position relative to the current element |
| insertAdjacentHTML() | HTML Element | Inserts a HTML formatted text at the specified position relative to the current element |
| insertAdjacentText() | HTML Element | Inserts text into the specified position relative to the current element |
| insertBefore() | HTML Element | Inserts a new child node before a specified, existing, child node |
| instanceof | Operators | Returns true if an object is an instance of a specified object |
| instant() | Temporal.Now | Returns current time as a Temporal.Instant object |
| Int8Array | Typed Array | Typed array of 8-bit signed integers |
| Int16Array | Typed Array | Typed array of 16-bit signed integers |
| Int32Array | Typed Array | Typed array of 32-bit signed integers |
| intersection() | Set | Returns the intersection of two sets |
| isArray() | Array | Checks whether an object is an array |
| isDisjointFrom() | Set | Returns true if no Set elements are elements in the argument Set |
| isError() | Error | Returns true if a passed value is an Error |
| isExtensible() | Proxy | Returns true if an object is extensible |
| isExtensible() | Reflect | Returns true if an object is extensible |
| isFinite() | Number | Rturns true if a Number is a finite number |
| isNaN() | Number | Returns true if the value of a Number is NaN |
| isSubsetOf() | Set | Returns true if all Set elements are elements in the argument Set |
| isSupersetOf() | Set | Returns true if all elements in the argument Set are also in this Set |
| isWellFormed() | String | Returns true if a string is well formed |
| isComposing | InputEvent KeyboardEvent |
Returns whether the state of the event is composing or not |
| isContentEditable | HTML Element | Returns true if the content of an element is editable, otherwise false |
| isDefaultNamespace() | HTML Element | Returns true if a specified namespaceURI is the default, otherwise false |
| isEqualNode() | HTML Element | Checks if two elements are equal |
| isExtensible() | Object | Returns true if an object is extensible |
| isFinite() | Global Number |
Determines whether a value is a finite, legal number |
| isFrozen() | Object | Returns true if an object is frozen |
| isId | Attribute | Returns true if the attribute is of type Id, otherwise it returns false |
| isInteger() | Number | Checks whether a value is an integer |
| isNaN() | Global Number |
Determines whether a value is an illegal number |
| isSafeInteger() | Number | Checks whether a value is a safe integer |
| isSameNode() | HTML Element | Checks if two elements are the same node |
| isSealed() | Object | Returns true if an object is sealed |
| isSupported() | HTML Element | Returns true if a specified feature is supported on the element |
| isTrusted | Event | Returns whether or not an event is trusted |
| item() | Attribute | Returns the attribute at a specified index |
| item() | HTML Collection | Returns the element at a specified index |
| item() | HTML NodeList | Returns the node at a specified index |
| item() | DOMTokenList | Returns the token at a specified index |
| javaEnabled() | Window Navigator | Returns true if the browser has Java enabled |
| join() | Array | Returns all elements of an array joined as a string |
| join() | Typed Array | Returns all elements of a typed array joined as a string |
| key | KeyboardEvent StorageEvent |
Returns the key value of the key represented by the event |
| key() | Storage | Returns the name of the nth key in the storage |
| keyCode | KeyboardEvent | Returns the Unicode character code of the key that triggered the onkeypress event, or the Unicode key code of the key that triggered the onkeydown or onkeyup event |
| keys() | Array | Returns an Iterator with the keys of an array |
| keys() | Map | Returns an Iterator with the keys of a map |
| keys() | Object | Returns an Iterator with the keys of an object |
| keys() | Set | Returns an Iterator with the keys of a det |
| keys() | Typed Array | Returns an Iterator with the keys of an array |
| keys() | NodeList | Returns an Iterator with the keys of a NodeList |
| keys() | DOMTokenList | Returns an Iterator with the keys of a DOMTokenList |
| lang | HTML Element | Sets or returns the value of the lang attribute of an element |
| language | Navigator | Returns the language of the browser |
| lastChild | HTML Element | Returns the last child node of an element |
| lastElementChild | HTML Element | Returns the last child element of an element |
| lastIndex | RegExp | Specifies the index at which to start the next match |
| lastIndexOf() | Array | Returns the last index of an element in an array |
| lastIndexOf() | String | Returns the last index of an element in a string |
| lastIndexOf() | Typed Array | Returns the last position of an element in a typed array |
| lastModified | HTML Document | Returns the date and time the document was last modified |
| length | Array | Sets or returns the number of elements in an array |
| length | String | Returns the length of a string |
| length | Typed Array | Returns the length of a Typed Array |
| length | Window Object | Returns the number of (framed) windows in the Window |
| length | Window History | Returns the number of URLs in the Window history |
| length | HTML Attributes | Returns the number of nodes (attributes) in a NamedNodeMap. |
| length | HTML Collection | Returns the number of elements in an HTMLCollection |
| length | HTML NodeList | Returns the number of nodes in a NodeList |
| length | DOMTokenList | Returns the number of tokens in a DOMTokenList |
| length | API Storage | Returns the number of items stored in for this domain |
| length | Function | Returns the number of Function parameters |
| lengthComputable | ProgressEvent | Returns if the length of the progress can be computable |
| let | Statements | Declares a variable inside brackets {} scope |
| links | HTML Document | Returns a collection of all <a> and <area> elements in the document that have a href attribute |
| LN2 | Math | Returns the natural logarithm of 2 (approx. 0.693) |
| LN10 | Math | Returns the natural logarithm of 10 (approx. 2.302) |
| loaded | ProgressEvent | Returns how much work has been loaded |
| localeCompare() | String | Compares two strings in the current locale |
| localStorage | Window Object | Allows to save key/value pairs in a web browser. Stores the data with no expiration date |
| location | KeyboardEvent | Returns the location of a key on the keyboard or device |
| location | Window Object | Returns the Location object for a window |
| log() | Math Console |
Returns the natural logarithm of a number |
| log() | Window Console | Writes (logs) a message to the console |
| log10() | Math | Returns the base-10 logarithm of a number |
| log1p() | Math | Returns the natural logarithm of 1 + a number |
| log2() | Math | Returns the base-2 logarithm of a number |
| LOG2E | Math | Returns the base-2 logarithm of E (approx. 1.442) |
| LOG10E | Math | Returns the base-10 logarithm of E (approx. 0.434) |
| map() | Array | Creates an array from calling a function for each array element |
| map() | Iterator | Creates an iterator from calling a function for each iterator element |
| map() | Typed Array | Returns a new typed array using a function on every array element |
| match() | String | Returns the matches in a string against a regular expression |
| matchAll() | Strings | Returns the matches in a string against a regular expression |
| matches() | HTML Element | Returns a boolean value indicating whether an element is matched by a specific CSS selector or not |
| matchMedia() | Window Object | Returns a MediaQueryList object representing the specified CSS media query string |
| max() | Math | Returns the number with the highest value |
| MAX_SAFE_INTEGER | Number | Returns the maximum safe integer in JavaScript |
| MIN_SAFE_INTEGER | Number | Returns the minimum safe integer in JavaScript |
| MAX_VALUE | Number | Returns the largest number possible in JavaScript |
| MIN_VALUE | Number | Returns the smallest number possible in JavaScript |
| message | Error | Sets or returns an error message (a string) |
| metaKey | MouseEvent KeyboardEvent TouchEvent |
Returns whether the "META" key was pressed when an event was triggered |
| min() | Math | Returns the number with the lowest value |
| multiline | RegExp | Checks whether the "m" modifier is set |
| MIN_VALUE | Number | Returns the smallest number possible in JavaScript |
| moveBy() | Window Object | Moves a window relative to its current position |
| moveTo() | Window Object | Moves a window to the specified position |
| MovementX | MouseEvent | Returns the horizontal coordinate of the mouse pointer relative to the position of the last mousemove event |
| MovementY | MouseEvent | Returns the vertical coordinate of the mouse pointer relative to the position of the last mousemove event |
| name | Error | Sets or returns an Error name |
| name | Function | Returns the name of a function |
| name | Typed Array | Returns the name of the Typed Array |
| name | Window Object | Returns the name of the Window |
| name | HTML Attribute | Returns the name of the Attribute |
| namedItem() | HTMLCollection | Returns the element with the specified ID, or name, in an HTMLCollection |
| namespaceURI | HTML Element | Returns the namespace URI of an element |
| NaN | Global | A number that is not a legal number (Not-a-Number) |
| NaN | Number | A number that is not a legal number (Not-a-Number) |
| negated() | Duration | Returns a new duration with this duration negated |
| navigator | Window Object | Returns the Navigator object for a window |
| NEGATIVE_INFINITY | Number | Represents negative infinity (returned on overflow) |
| new (constructor) | Array | Creates a new Array object |
| new (constructor) | Boolean | Creates a new Boolean object |
| new (constructor) | Date | Creates a new Date object |
| new (constructor) | Duration | Creates a new Duration object |
| new (constructor) | Error | Creates a new Error object |
| new (constructor) | Instant | Creates a new Instant object |
| new (constructor) | Map | Creates a new Map object |
| new (constructor) | PlainDate | Creates a new PlainDate object |
| new (constructor) | PlainDateTime | Creates a new PlainDateTime object |
| new (constructor) | PlainMonthDay | Creates a new PlainMonthDay object |
| new (constructor) | PlainTime | Creates a new PlainTime object |
| new (constructor) | PlainYearMonth | Creates a new PlainYearMonth object |
| new (constructor) | Promise | Creates a new Promise object |
| new (constructor) | Set | Creates a new Set object |
| new (constructor) | ZonedDateTime | Creates a new ZonedDateTime object |
| newURL | HTML Event | Returns the URL after the document anchor has been changed |
| newValue | StorageEvent | Returns the new value of the changed storage item |
| nextSibling | HTML Element | Returns the next node at the same node tree level |
| nextElementSibling | HTML Element | Returns the next element at the same node tree level |
| nodeName | HTML Element | Returns the name of a node |
| nodeType | HTML Element | Returns the node type of a node |
| nodeValue | HTML Element | Sets or returns the value of a node |
| normalize() | HTML Document | Removes empty text nodes, and joins adjacent nodes |
| normalize() | HTML Element | Removes empty text nodes, and joins adjacent nodes |
| normalizeDocument() | HTML Document | Removes empty Text nodes, and joins adjacent nodes |
| now() | Date | Returns the number of milliseconds since midnight Jan 1, 1970 |
| Number() | Global | Converts an object's value to a number |
| of() | Array | Creates an array from a number of arguments |
| of() | Typed Array | Creates a typed array from a number of arguments |
| offsetHeight | HTML Element | Returns the height of an element, including padding, border and scrollbar |
| offsetWidth | HTML Element | Returns the width of an element, including padding, border and scrollbar |
| offsetLeft | HTML Element | Returns the horizontal offset position of an element |
| offsetParent | HTML Element | Returns the offset container of an element |
| offsetTop | HTML Element | Returns the vertical offset position of an element |
| offsetX | MouseEvent | Returns the horizontal coordinate of the mouse pointer relative to the position of the edge of the target element |
| offsetY | MouseEvent | Returns the vertical coordinate of the mouse pointer relative to the position of the edge of the target element |
| oldURL | HTML Event | Returns the URL of the document, before the hash was changed |
| oldValue | StorageEvent | Returns the old value of the changed storage item |
| onabort | Event | Occurs when the loading of a media is aborted |
| onafterprint | Event | Occurs when a page has started printing, or if the print dialogue box has been closed |
| onanimationend | AnimationEvent | Occurs when a CSS animation has completed |
| onanimationiteration | AnimationEvent | Occurs when a CSS animation is repeated |
| onanimationstart | AnimationEvent | Occurs when a CSS animation has started |
| onbeforeprint | Event | Occurs when a page is about to be printed |
| onbeforeunload | Event | Occurs before the document is about to be unloaded |
| onblur | FocusEvent | Occurs when an element loses focus |
| oncanplay | Event | Occurs when the browser can start playing the media (when it has buffered enough to begin) |
| oncanplaythrough | Event | Occurs when the browser can play through the media without stopping for buffering |
| onchange | Event | Occurs when the content of a form element, the selection, or the checked state have changed (for <input>, <select>, and <textarea>) |
| onclick | MouseEvent | Occurs when the user clicks on an element |
| oncontextmenu | MouseEvent | Occurs when the user right-clicks on an element to open a context menu |
| oncopy | ClipboardEvent | Occurs when the user copies the content of an element |
| oncut | ClipboardEvent | Occurs when the user cuts the content of an element |
| ondblclick | MouseEvent | Occurs when the user double-clicks on an element |
| ondrag | DragEvent | Occurs when an element is being dragged |
| ondragend | DragEvent | Occurs when the user has finished dragging an element |
| ondragenter | DragEvent | Occurs when the dragged element enters the drop target |
| ondragleave | DragEvent | Occurs when the dragged element leaves the drop target |
| ondragover | DragEvent | Occurs when the dragged element is over the drop target |
| ondragstart | DragEvent | Occurs when the user starts to drag an element |
| ondrop | DragEvent | Occurs when the dragged element is dropped on the drop target |
| ondurationchange | Event | Occurs when the duration of the media is changed |
| onemptied | Occurs when something bad happens and the media file is suddenly unavailable (like unexpectedly disconnects) | |
| onended | Event | Occurs when the media has reach the end (useful for messages like "thanks for listening") |
| onerror | ProgressEvent Event |
Occurs when an error occurs while loading an external file |
| onfocus | FocusEvent | Occurs when an element gets focus |
| onfocusin | FocusEvent | Occurs when an element is about to get focus |
| onfocusout | FocusEvent | Occurs when an element is about to lose focus |
| onfullscreenchange | Event | Occurs when an element is displayed in fullscreen mode |
| onfullscreenerror | Event | Occurs when an element can not be displayed in fullscreen mode |
| onhashchange | HashChangeEvent | Occurs when there has been changes to the anchor part of a URL |
| oninput | InputEvent Event |
Occurs when an element gets user input |
| oninvalid | Event | Occurs when an element is invalid |
| onkeydown | KeyboardEvent | Occurs when the user is pressing a key |
| onkeypress | KeyboardEvent | Occurs when the user presses a key |
| onkeyup | KeyboardEvent | Occurs when the user releases a key |
| onLine | Navigator | Determines whether the browser is online |
| onload | Event | Occurs when an object has loaded |
| onloadeddata | Event | Occurs when media data is loaded |
| onloadedmetadata | Event | Occurs when meta data (like dimensions and duration) are loaded |
| onloadstart | ProgressEvent | Occurs when the browser starts looking for the specified media |
| onmessage | Event | Occurs when a message is received through the event source |
| onmousedown | MouseEvent | Occurs when the user presses a mouse button over an element |
| onmouseenter | MouseEvent | Occurs when the pointer is moved onto an element |
| onmouseleave | MouseEvent | Occurs when the pointer is moved out of an element |
| onmousemove | MouseEvent | Occurs when the pointer is moving while it is over an element |
| onmouseover | MouseEvent | Occurs when the pointer is moved onto an element, or onto one of its children |
| onmouseout | MouseEvent | Occurs when a user moves the mouse pointer out of an element, or out of one of its children |
| onmouseup | MouseEvent | Occurs when a user releases a mouse button over an element |
| onmousewheel | WheelEvent | Deprecated. Use the wheel event instead |
| onoffline | Event | Occurs when the browser starts to work offline |
| ononline | Event | Occurs when the browser starts to work online |
| onopen | Event | Occurs when a connection with the event source is opened |
| onpagehide | PageTransition | Occurs when the user navigates away from a webpage |
| onpageshow | PageTransition | Occurs when the user navigates to a webpage |
| onpaste | ClipboardEvent | Occurs when the user pastes some content in an element |
| onpause | Event | Occurs when the media is paused either by the user or programmatically |
| onplay | Event | Occurs when the media has been started or is no longer paused |
| onplaying | Event | Occurs when the media is playing after having been paused or stopped for buffering |
| onpopstate | PopStateEvent | Occurs when the window's history changes |
| onprogress | Event | Occurs when the browser is in the process of getting the media data (downloading the media) |
| onratechange | Event | Occurs when the playing speed of the media is changed |
| onresize | Event | Occurs when the document view is resized |
| onreset | Event | Occurs when a form is reset |
| onscroll | Event | Occurs when an element's scrollbar is being scrolled |
| onsearch | Event | Occurs when the user writes something in a search field (for <input="search">) |
| onseeked | Event | Occurs when the user is finished moving/skipping to a new position in the media |
| onseeking | Event | Occurs when the user starts moving/skipping to a new position in the media |
| onselect | Event | Occurs after the user selects some text (for <input> and <textarea>) |
| onshow | Event | Occurs when a <menu> element is shown as a context menu |
| onstalled | Event | Occurs when the browser is trying to get media data, but data is not available |
| onstorage | StorageEvent | Occurs when a Web Storage area is updated |
| onsubmit | Event | Occurs when a form is submitted |
| onsuspend | Event | Occurs when the browser is intentionally not getting media data |
| ontimeupdate | Event | Occurs when the playing position has changed (like when the user fast forwards to a different point in the media) |
| ontoggle | Event | Occurs when the user opens or closes the <details> element |
| ontouchcancel | TouchEvent | Occurs when the touch is interrupted |
| ontouchend | TouchEvent | Occurs when a finger is removed from a touch screen |
| ontouchmove | TouchEvent | Occurs when a finger is dragged across the screen |
| ontouchstart | TouchEvent | Occurs when a finger is placed on a touch screen |
| ontransitionend | TransitionEvent | Occurs when a CSS transition has completed |
| onunload | Event | Occurs when a page has unloaded or window has been closed |
| onvolumechange | Event | Occurs when the volume of the media has changed or been muted |
| onwaiting | Event | Occurs when a media has paused but is expected to resume (buffering) |
| onwheel | WheelEvent | Occurs when the mouse wheel rolls up or down over an element |
| open() | HTML Document | Opens an HTML Document to collect output from document.write() |
| open() | Window Object | Opens a new browser window or a new tab |
| opener | Window Object | Returns a reference to the window that created the window |
| origin | Window Object | Returns the protocol, hostname and port number of a URL |
| outerHeight | Window Object | Returns the height of the browser window with toolbars/scrollbars |
| outerHTML | HTML Element | Sets or returns the outer content of an element |
| outerText | HTML Element | Sets or returns the text outer content of a node and its descendants |
| outerHeight | Window Object | Returns the height of the browser window with toolbars/scrollbars |
| outerWidth | Window Object | Returns the width of the browser window with toolbars/scrollbars |
| ownerDocument | HTML Element | Returns the root element (document object) for an element |
| ownKeys() | Proxy | Traps operations listing keys (properties) |
| ownKeys() | Reflect | Returns an array of an object's own property keys |
| padEnd() | String | Pads a string at the end |
| padStart() | String | Pads a string from the start |
| pageX | MouseEvent | Returns the horizontal coordinate of the mouse pointer |
| pageXOffset | Window Object | Returns the pixels a document has been scrolled |
| pageY | MouseEvent | Returns the vertical coordinate of the mouse pointer |
| pageYOffset | Window Object | Returns the pixels a document has been scrolled |
| pageYOffset | Window Object | Returns the pixels a document has been scrolled |
| parent | Window Object | Returns the parent window of the current window |
| parentNode | HTML Element | Returns the parent node of an element |
| parentElement | HTML Element | Returns the parent element node of an element |
| parse() | Date | Parses a string and returns milliseconds since epoch |
| parse() | JSON | Parses a string and returns a JavaScript object |
| parseFloat() | Global | Parses a string and returns the first number |
| parseFloat() | Number | Parses a string and returns the first number |
| parseInt() | Global | Parses a string and returns the first integer |
| parseInt() | Number | Parses a string and returns the first integer |
| pathname | Window Object | Sets or returns the path name of a URL |
| persisted | PageTransition | Returns whether the webpage was cached by the browser |
| PI | Math | Returns PI (approx. 3.14) |
| pixelDepth | Screen | Returns the color resolution (in bits per pixel) of the screen |
| plainDateISO() | Temporal.Now | Returns a PlainDate representing current date in ISO 8601 |
| plainDateTimeISO() | Temporal.Now | Returns a PlainDateTime representing current date in ISO 8601 |
| plainTimeISO() | Temporal.Now | Returns a PlainTime representing current time in ISO 8601 |
| platform | Navigator | Returns for which platform the browser is compiled |
| preventExtentions() | Proxy | Makes an object non-extensive |
| preventExtentions() | Reflect | Prevent properties from being added to an object |
| pop() | Array | Removes the last element of an array, and returns that element |
| port | Window Object | Sets or returns the port number of a URL |
| position | Geolocation | Returns the position of the concerned device at a given time |
| positionError | Geolocation | Returns the reason of an error occurring when using the geolocating device |
| positionOptions | Geolocation | Describes an object containing option properties to pass as a parameter of Geolocation.getCurrentPosition() and Geolocation.watchPosition() |
| POSITIVE_INFINITY | Number | Represents infinity (returned on overflow) |
| pow() | Math | Returns the value of x to the power of y |
| preventDefault() | Event | Cancels the event if it is cancelable, meaning that the default action that belongs to the event will not occur |
| preventExtensions() | Object | Prevents adding new properties to an object |
| previousSibling | HTML Element | Returns the previous node at the same node tree level |
| previousElementSibling | HTML Element | Returns the previous element at the same node tree level |
| print() | Window Object | Prints the content of the current window |
| prompt() | Window Object | Displays a dialog box that prompts the visitor for input |
| prototype | Number Object String |
Allows you to add properties and methods to an object |
| product | Navigator | Returns the engine name of the browser |
| propertyName | AnimationEvent TransitionEvent |
Returns the name of the CSS property associated with the animation or transition |
| protocol | Window Object | Sets or returns the protocol of a URL |
| prototype | Array | Bult in template for Array properties and methods |
| prototype | Boolean | Bult in template for Boolean properties and methods |
| prototype | Date | Bult in template for Date properties and methods |
| prototype | Object | Bult in template for Object properties and methods |
| prototype | String | Bult in template for String properties and methods |
| pseudoElement | AnimationEvent TransitionEvent |
Returns the name of the pseudo-element of the animation or transition |
| push() | Array | Adds new elements to the end of an array, and returns the new length |
| querySelector() | HTML Document | Returns the first element that matches a CSS selector |
| querySelector() | HTML Element | Return first child element that matches a CSS selector |
| querySelectorAll() | HTML Document | Returns all elements that matches a CSS selector |
| querySelectorAll() | HTML Element | Returns all child elements that matches a CSS selector |
| race() | Promise | Returns a Promise from a list of promises, when the faster promise settles |
| random() | Math | Returns a random number between 0 and 1 |
| readyState | HTML Document | Returns the (loading) status of the document |
| reduce() | Array | Reduce the values of an array to a single value |
| reduce() | Iterator | Reduce the values of an Iterator to a single value |
| reduce() | Typed Array | Reduce the values of a Typed Array to a single value |
| reduceRight() | Array | Reduce the values of an array to a single value |
| reduceRight() | Typed Array | Reduce the values of a Typed Array to a single value |
| referrer | HTML Document | Returns the URL of the document that loaded the current document |
| reject() | Promise | Returns a Promise object rejected with a value |
| reload() | Window Object | Reloads the current document |
| remove() | HTML Element | Removes an element from the HTML DOM |
| remove() | DOMTokenList | Removes an element from a DOMTokenList |
| removeAttribute() | HTML Element | Removes an attribute from an element |
| removeAttributeNode() | HTML Element | Removes an attribute from an element |
| removeChild() | HTML Element | Removes a child node from an element |
| removeEventListener() | HTML Document | Removes an event handler from an HTML Document |
| removeEventListener() | HTML Element | Removes an event handler from an HTML Element |
| removeEventlistener() | Window Object | Removes an event handler from a Window Object |
| removeItem() | Storage | Removes that key from the storage |
| removeNamedItem() | Attribute | Removes a node (by name) in a NamedNodeMap |
| removeNamedItem() | Attribute | Removes a specified attribute node |
| renameNode() | HTML Document | Renames the specified node |
| repeat | KeyboardEvent | Returns whether a key is being hold down repeatedly, or not |
| repeat() | String | Returns a new string with a specified number of copies of an existing string |
| replace() | DOMTokenList | Replaces a token in a DOMTokenList. |
| replace() | String | Returns a string with a specified value is replaced |
| replace() | Window Location | Replaces the current document with a new one |
| replaceAll() | String | Returns a string with all matches of a specified value are replaced |
| replaceChild() | HTML Element | Replaces a child node in an element |
| requestAnimationFrame() | Window Object | Requests function to update an animation before the next repaint |
| requestFullscreen() | HTML Element | Shows an element in fullscreen mode |
| resizeBy() | Window Object | Resizes the window by the specified pixels |
| resizeTo() | Window Object | Resizes the window to the specified width and height |
| resolve() | Promise | Returns a Promise object resolved with a value |
| rest (...) | Arrays | Destructs an array and collects the leftovers. |
| return | Statements | Stops the execution of a function and returns a value from that function |
| reverse() | Array | Reverses the order of the elements in an array |
| reverse() | Typed Array | Reverses the order of the elements in a Typed Array |
| round() | Math | Rounds x to the nearest integer |
| round() | ZonedDate | Returns a ZonedDateTime with this ZonedDateTime rounded |
| relatedTarget | MouseEvent FocusEvent |
Returns the element related to the element that triggered the mouse event |
| round() | Duration | Returns a new Duration with this Duration rounded |
| round() | Instant | Returns a new Instant with this Instant rounded |
| round() | PlainDateTime | Returns a new PlainDateTime with this PlainDateTime rounded |
| round() | PlainTime | Returns a new PlainTime with this PlainTime rounded |
| screen | Window Object | Returns the Screen object for the window |
| screenLeft | Window Object | Retrns the left position of a window |
| screenTop | Window Object | Retrns the top position of a window |
| screenX | Window Object | Returns the horizontal coordinate of the window/mouse pointer |
| screenX | Window Object | Returns the vertical coordinate of the mouse pointer |
| screenY | Window Object | Returns the vertical coordinate of the mouse pointer |
| scripts | HTML Document | Returns a collection of <script> elements in the document |
| scroll() | Window Object | Deprecated. Use scrollTo() instead. |
| scrollBy() | Window Object | Scrolls the document by the specified number of pixels |
| scrollHeight | HTML Element | Returns the entire height of an element, including padding |
| scrollIntoView() | HTML Element | Scrolls the specified element into the visible area of the browser window |
| scrollLeft | HTML Element | Sets or returns the number of pixels an element's content is scrolled horizontally |
| scrollTo() | Window Object | Scrolls the document to the specified coordinates |
| scrollTop | HTML Element | Sets or returns the number of pixels an element's content is scrolled vertically |
| scrollWidth | HTML Element | Returns the entire width of an element, including padding |
| scrollX | Window Object | An alias of pageXOffset |
| scrollY | Window Object | An alias of pageYOffset |
| seal() | Object | Prevents additions or deletions of new properties |
| search | Window Object | Sets or returns the querystring part of a URL |
| search() | String | Searches a string for a specified value, or regular expression, and returns the position of the match |
| self | Window Object | Returns the current window |
| sessionStorage | Window Object | Allows to save key/value pairs in a web browser. Stores the data for one session |
| set() | Map | Sets the value for a key in a map |
| set() | Proxy | Traps the internal [[Set]] method |
| set() | Reflect | Sets the value of a property |
| set() | Typed Array | Stores values in a typed array from another array |
| setAttribute() | HTML Element | Sets or changes the specified attribute, to the specified value |
| setAttributeNode() | HTML Element | Sets or changes the specified attribute node |
| setDate() | Date | Sets the day of the month of a date object |
| setFullYear() | Date | Sets the year of a date object |
| setHours() | Date | Sets the hour of a date object |
| setInterval() | Window Object | Calls a function / evaluates an expression at specified intervals |
| setItem() | Storage | Adds or updates the value of the a storage object item |
| setMilliseconds() | Date | Sets the milliseconds of a date object |
| setMinutes() | Date | Set the minutes of a date object |
| setMonth() | Date | Sets the month of a date object |
| setNamedItem() | Attribute | Sets the specified attribute node (by name) |
| setPrototypeOf() | Proxy | Traps setPrototypeOf() |
| setPrototypeOf() | Reflect | Sets the prototype of an object |
| setSeconds() | Date | Sets the seconds of a date object |
| setTime() | Date | Sets a date to a specified number of milliseconds after epoch |
| setTimeout() | Window Object | Calls a function or evaluates an expression after a number of milliseconds |
| setUTCDate() | Date | Sets the day of the month of a date object, according to universal time |
| setUTCFullYear() | Date | Sets the year of a date object, according to universal time |
| setUTCHours() | Date | Sets the hour of a date object, according to universal time |
| setUTCMilliseconds() | Date | Sets the milliseconds of a date object, according to universal time |
| setUTCMinutes() | Date | Set the minutes of a date object, according to universal time |
| setUTCMonth() | Date | Sets the month of a date object, according to universal time |
| setUTCSeconds() | Date | Set the seconds of a date object, according to universal time |
| setYear() | Date | Deprecated. Use setFullYear() instead |
| shift() | Array | Removes the first element of an array, and returns that element |
| shiftKey | MouseEvent KeyboardEvent TouchEvent |
Returns whether the "SHIFT" key was pressed when an event was triggered |
| sign(x) | Math | Returns the sign of a number (checks whether it is positive, negative or zero) |
| sin() | Math | Returns the sine of x (x is in radians) |
| sinh() | Math | Returns the hyperbolic sine of x |
| since() | Instant | Returns the Duration from another Instant |
| since() | PlainDate | Returns the Duration from another PlainDate |
| since() | PlainDateTime | Returns the Duration from another PlainDateTime |
| since() | PlainTime | Returns the Duration from another PlainTime |
| since() | PlainYearMonth | Returns the Duration from another PlainYearMonth |
| since() | ZonedDateTime | Returns the Duration from another ZonedDateTime |
| size | Map | Returns the number of map elements |
| size | Set | Returns the number of set elements |
| slice() | Array | Returns an array with selected elements from an array |
| slice() | Strings | Returns a string with selected characters from a string |
| slice() | Typed Array | Returns a typed array with selected elements from another array |
| some() | Array | Returns true if some elements in an array pass a test |
| some() | Iterators | Returns true if some elements in an interator pass a test |
| some() | Typed Array | Returns true if a function returns true for any array element |
| sort() | Array | Sorts the elements of an array |
| sort() | Typed Array | Returns a sorted typed array. |
| source | RegExp | Returns the text of the RegExp pattern |
| specified | Attribute | Returns true if the attribute has been specified, otherwise it returns false |
| splice() | Array | Adds/Removes elements from an array |
| split() | String | Splits a string into an array of substrings |
| spread (...) | Array | Splits an array into individual elements. |
| sqrt() | Math | Returns the square root of x |
| SQRT1_2 | Math | Returns the square root of 1/2 (approx. 0.707) |
| SQRT2 | Math | Returns the square root of 2 (approx. 1.414) |
| static | Classes | Defines a static method for a class |
| startsWith() | String | Checks whether a string begins with specified characters |
| state | PopStateEvent | Returns an object containing a copy of the history entries |
| status | Window Object | Sets or returns the text in the statusbar of a window |
| sticky | RegExp | Returns true if the /y modifier is set in an expression |
| stop() | Window Object | Stops the window from loading |
| stopImmediate Propagation() |
Event | Prevents other listeners of the same event from being called |
| stopPropagation() | Event | Prevents further propagation of an event during event flow |
| storageArea | StorageEvent | Returns an object representing the affected storage object |
| String() | Global | Converts a value to a string |
| stringify() | JSON | Convert a JavaScript object to a JSON string |
| strictErrorChecking | HTML Document | Deprecated. Sets or returns whether error-checking is enforced or not |
| style | HTML Element | Sets or returns the value of the style attribute of an element |
| subarray() | Typed Array | Creates a new typed array in the same memory space |
| substr() | String | Deprecated. Use substring() or slice() instead |
| substring() | String | Extracts characters (between two indices) from a string |
| subtract() | Duration | Returns a Duration with a Duration subtracted |
| subtract() | Instant | Returns an Instant with a Duration subtracted |
| subtract() | PlainDate | Returns a PlainDate with a Duration subtracted |
| subtract() | PlainDateTime | Returns a PlainDateTime with a Duration subtracted |
| subtract() | PlainTime | Returns a PlainTime with a Duration subtracted |
| subtract() | PlainYearMonth | Returns a PlainYearMonth with a Duration subtracted |
| subtract() | ZonedDateTime | Returns a ZonedDatetime with a Duration subtracted |
| super | Classes | Refers to the parent class |
| supports() | DOMTokenList | Returns true if a token is one of an attribute's supported tokens |
| switch | Statements | Marks a block of statements to be executed depending on different cases |
| symmetricDifference() | Set | Returns the symmetric difference between two sets |
| table() | Console | Displays tabular data as a table |
| tabIndex | HTML Element | Sets or returns the value of the tabindex attribute of an element |
| tagName | HTML Element | Returns the tag name of an element |
| taintEnabled() | Window Navigator | Deprecated. |
| take() | Iterators | Returns an iterator with specific elements from an iterator. |
| tan() | Math | Returns the tangent of an angle |
| tanh() | Math | Returns the hyperbolic tangent of a number |
| target | Event | Returns the element that triggered the event |
| targetTouches | TouchEvent | Returns a list of all the touch objects that are in contact with the surface and where the touchstart event occured on the same target element as the current target element |
| test() | RegExp | Tests for a match in a string. Returns true or false |
| textContent | HTML Element | Sets or returns the textual content of a node and its descendants |
| then() | Promise | Provides two callbacks: One funtion to run when a promise is fulfilled and one funtion to run when a promise is rejected |
| this | Refers to the object it belongs to | |
| throw | Statements | Throws (generates) an error |
| time() | Console | Starts a timer (can track how long an operation takes) |
| timeEnd() | Console | Stops a timer that was previously started by console.time() |
| timeStamp | Event | Returns the time (in milliseconds) when the event was created |
| timeZoneId() | Temporal.Now | Returns a time zoneId representing the system's current time zone |
| title | HTML Document | Sets or returns the title of the document |
| title | HTML Elements | Sets or returns the value of an element's title attribute |
| toDateString() | Date | Converts the date portion of a Date object into a readable string |
| toExponential() | Number | Converts a number into an exponential notation |
| toFixed(x) | Number | Formats a number with x numbers of digits after the decimal point |
| toggle() | DOMTokenList | Adds one (or more) tokens to a DOMTokenList |
| toGMTString() | Date | Deprecated. Use toUTCString() instead |
| toInstant() | ZonedDateTime | Returns an Instant representing the ZonedDateTime |
| toISOString() | Date | Returns a Date as a string, using the ISO standard |
| toJSON() | Date | Returns a Date as an ISO/RFC 9557 String |
| toJSON() | Duration | Returns a Duration as an ISO/RFC 9557 String |
| toJSON() | Instant | Returns a Instant as an ISO/RFC 9557 String |
| toJSON() | PlainDate | Returns a PlainDate as an ISO/RFC 9557 String |
| toJSON() | PlainDateTime | Returns a PlainDateTime as an ISO/RFC 9557 String |
| toJSON() | PlainMonthDay | Returns a PlainMonthDay as an ISO/RFC 9557 String |
| toJSON() | PlainTime | Returns a PlainTime as an ISO/RFC 9557 String |
| toJSON() | PlainYearMonth | Returns a PlainYearMonth as an ISO/RFC 9557 String |
| toJSON() | ZonedDateTime | Returns a ZonedDateTime as an ISO/RFC 9557 String |
| toLocaleDateString() | Date | Returns the date portion of a Date object as a string, using locale conventions |
| toLocaleLowerCase() | String | Converts a string to lowercase letters, according to the host's locale |
| toLocaleString() | Date | Returns the Date as a string using locale settings |
| toLocaleString() | Duration | Returns a Duration as a string using locale settings |
| toLocaleString() | Instant | Returns an Intant as a string using locale settings |
| toLocaleString() | Number | Returns a Date as a string using locale settings |
| toLocaleString() | PlainDate | Returns a PlainDate as a string using locale settings |
| toLocaleString() | PlainDateTime | Returns a PlainDateTime as a string using locale settings |
| toLocaleString() | PlainMonthDay | Returns a PlainMontDay as a string using locale settings |
| toLocaleString() | PlainTime | Returns a PlainTime as a string using locale settings |
| toLocaleString() | PlainYearMonth | Returns a PlainYearMonth a string using locale settings |
| toLocaleString() | Typed Array | Returns an array as strings using locale settings |
| toLocaleString() | ZonedDateTime | Returns a ZonedDateTime as a string using locale settings |
| toLocaleTimeString() | Date | Returns the time of a Date as a string using locale settings |
| toLocaleUpperCase() | String | Converts a string to uppercase letters, according to the host's locale |
| toLowerCase() | String | Converts a string to lowercase letters |
| top | Window Object | Returns the topmost browser window |
| toPlainDate() | PlainDateTime | Returns a PlainDate representing this PlainDateTime |
| toPlainDate() | PlainMonthDay | Returns a PlainDate representing this PlainMonthDay and a year |
| toPlaindate() | PlainYearMonth | Returns a PlainDate representing this PlainYearMonth and a day |
| toPlainDate() | ZonedDateTime | Returns a PlainDate representing the ZonedDateTime |
| toPlainDateTime() | PlainDate | Returns a PlainDateTime representing this PlainDate |
| toPlainDateTime() | ZonedDateTime | Returns a PlainDateTime representing the ZonedDateTime |
| toPlainMonthDay() | PlainDate | Returns a PlainMonthDay representing this PlainDate |
| toPlainTime() | PlainDateTime | Returns a PlainTime representing this PlainDateTime |
| toPlainTime() | ZonedDateTime | Returns a PlainTime representing the ZonedDateTime |
| toPlainYearMonth() | PlainDate | Returns a PlainYearMonth representing this PlainDate |
| toPrecision(x) | Number | Formats a number to x length |
| toReversed() | Array | Returns a new reversed Array |
| toReversed() | Typed Array | Returns a new reversed Typed Array |
| toSorted() | Array | Returns a new sorted Array |
| toSorted() | Typed Array | Returns a new sorted Typed Array |
| toSpliced() | Array | Adds or removes array elements (to a new array) |
| startofday() | ZonedDateTime | Returns the first ZonedDateTime instant of this date |
| toString() | Array | Returns the string values of aa Array |
| toString() | Boolean | Returns the string value of a boolean |
| toString() | Date | Returns the string value of a Date |
| toString() | Function | Returns the string value of a function |
| toString() | Numbers | Returns the string value of a Number |
| toString() | Objects | Returns [object Object] |
| toString() | RegExp | Returns the string value of a regular expression |
| toString() | Strings | Returns the string value of a string |
| toString() | Typed Array | Returns the string values of a Typed Array |
| toString() | Duration | Returns the string value of a Duration |
| toString() | Instant | Returns the string value of an Instant |
| toString() | PlainDate | Returns the string value of a PlainDate |
| toString() | PlainDateTime | Returns the string value of a PlainDateTime |
| toString() | PlainMonthDay | Returns the string value of a PlainMonthDay |
| toString() | PlainTime | Returns the string value of a PlainTime |
| toString() | PlainYearMonth | Returns the string value of a PlainYearMonth |
| toString() | ZonedDateTime | Returns the string value of a ZonedDateTime |
| total() | Duration | Returns a number representing a total duration |
| total | ProgressEvent | Returns the total amount of work that will be loaded |
| toTimeString() | Date | Converts the time portion of a Date object to a string |
| touches | TouchEvent | Returns a list of all touch objects currently in contact with the surface |
| toUpperCase() | String | Converts a string to uppercase letters |
| toUTCString() | Date | Converts a Date object to a string, according to universal time |
| toWellFormed() | Strings | Returns a string with "lone surrogates" replaced as Unicode |
| toZonedDateTime() | PlainDate | Returns a ZonedDateTime representing this PlainDate |
| toZonedDateTime() | PlainDateTime | Returns a ZonedDateTime representing this PlainDateTime |
| toZonedDateTimeISO() | Instant | Returns a ZonedDateTime representing this Instant |
| trace() | Console | Outputs a stack trace to the console |
| transitionend | TransitionEvent | Occurs when a CSS transition has completed |
| trim() | String | Removes whitespace from both ends of a string |
| trimEnd() | String | Returns a string with removed whitespaces from the end |
| trimStart() | String | Returns a string with removed whitespaces from the start |
| trunc() | Math | Returns the integer part of a number (x) |
| try() | Promises | Executes a function and wraps the result in a promise |
| try ... catch ... finally | Statements | Marks the block of statements to be executed when an error occurs in a try block, and implements error handling |
| type | Event | Returns the name of the event |
| typeof | Operators | Returns the type of a variable |
| Uint8Array | Typed Arrays | Typed array of 8-bit unsigned integers |
| Uint8ClampedArray | Typed Arrays | Typed array of 8-bit clamped integers |
| Uint16Array | Typed Arrays | Typed array of 16-bit unsigned integers |
| Uint32Array | Typed Arrays | Typed array of 32-bit unsigned integers |
| undefined | Global | Indicates that a variable has not been assigned a value |
| unescape() | Global | Deprecated. Use decodeURI() instead |
| unicode | RegExp | Returns true if the u flag is set in an expression |
| unicodeSets | RegExp | Returns true if the v flag is set in an expression |
| union() | Set | Returns the union of two sets |
| unshift() | Array | Adds new elements to the beginning of an array, and returns the new length |
| until() | Instant | Returns the Duration from this Instant until another |
| until() | PlainDate | Returns the Duration from this PlainDate until another |
| until() | PlainDateTime | Returns the Duration from this PlainDateTime until another |
| until() | PlainTime | Returns the Duration from this PlainTime until another |
| until() | PlainYearMonth | Returns the Duration from this PlainYearMonth until another |
| until() | ZonedDateTime | Returns the Duration from this ZonedDateTime until another |
| url | StorageEvent | Returns the URL of the changed item's document |
| URL | HTML Document | Returns the full URL of the HTML document |
| userAgent | Navigator | Returns the user-agent header sent by the browser to the server |
| UTC() | Date | Returns the number of milliseconds in a date since midnight of January 1, 1970, according to UTC time |
| value | Attribute | Sets or returns the value of the attribute |
| value | DOMTokenList | Returns a DOMTokenList as a string |
| valueOf() | Array | Returns the primitive values of an array |
| valueOf() | Boolean | Returns the primitive value of a boolean |
| valueOf() | Date | Returns the primitive value of a Date |
| valueOf() | Function | Returns the primitive value of a function |
| valueOf() | Number | Returns the primitive value of a Number |
| valueOf() | Object | Returns [object Object] |
| valueOf() | Strings | Returns the primitive value of a string |
| valueOf() | Duration | Throws a TypeError |
| valueOf() | Instant | Throws a TypeError |
| valueOf() | PlainDate | Throws a TypeError |
| valueOf() | PlainDateTime | Throws a TypeError |
| valueOf() | PlainMonthDay | Throws a TypeError |
| valueOf() | PlainTime | Throws a TypeError |
| valueOf() | PlainYearMonth | Throws a TypeError |
| valueOf() | ZonedDateTime | Throws a TypeError |
| values() | Array | Returns an iterator object of the values in an array |
| values() | DOMTokenList | Returns an iterator object of the values in a DOMTokenList |
| values() | HTML NodeList | Returns an iterator object of the values in a NodeList |
| values() | Map | Returns an iterator object of the values in a map |
| values() | Objects | Returns an iterator object of the values in an object |
| values() | Sets | Returns an iterator object of the values in a det |
| values() | Typed Array | Returns an iterator object of the values in a Typed Array |
| var | Statements | Declares a variable |
| warn() | Console | Outputs a warning message to the console |
| watchPosition() | Geolocation | Returns a watch ID |
| which | MouseEvent KeyboardEvent |
Returns which mouse button was pressed when the mouse event was triggered |
| width | Screen | Returns the total width of the screen |
| with() | Array | Returns an array with an updated element |
| with() | Typed Array | Returns a typed array with an updated element |
| withResolvers() | Promise | Returns an object containing 3 properties: 1. A Promise Object 2. A function that resolves the promise 3. A function that rejects the promise |
| with() | Duration | Returns a Duration with properties modified |
| with() | PlainDate | Returns a PlainDate with properties modified |
| with() | PlainDateTime | Returns a PlainDateTime with properties modified |
| with() | PlainMonthDay | Returns a PlainMonthDay with properties modified |
| with() | PlainTime | Returns a PlainTime with properties modified |
| with() | PlainYearMonth | Returns a PlainYearMonth with properties modified |
| with() | ZonedDateTime | Returns a ZonedDateTime with properties modified |
| withCalendar() | PlainDate | Returns a PlainDate in a new calendar system |
| withCalendar() | PlainDateTime | Returns a PlainDateTime in a new calendar system |
| withCalendar() | ZonedDateTime | Returns a ZonedDateTime in a new calendar system |
| withPlainTime() | PlainDateTime | Returns a PlainDateTime with the time part replaced |
| withPlainTime() | ZonedDateTime | Returns a ZonedDateTime with the time part replaced |
| withTimeZone() | ZonedDateTime | Returns a ZonedDateTime with in another time zone. |
| view | Event | Returns a reference to the Window object where the event occurred |
| void | Operators | Evaluates an expression and returns undefined |
| while | Statements | Marks a block of statements to be executed while a condition is true |
| write() | HTML Document | Writes HTML expressions or JavaScript code to a document |
| writeln() | HTML Document | Same as write(), but adds a newline character after each statement |
| yield | Operators | Pauses and resumes a generator function |
| zonedDateTimeISO() | Temporal.Now | Returns a ZonedDateTime representing the current date and time in the specified time zone |
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