- October 9, 2026The matches() method of the Element interface tests whether the element would be selected by the specified CSS selector.
- October 9, 2026The forEach() method of the DOMTokenList interface calls the callback given in parameter once for each value pair in the…
- October 9, 2026Warning: This method parses its input as HTML, writing the result into the DOM.
- October 9, 2026The add() method of the DOMTokenList interface adds the given tokens to the list, omitting any that are already present.
- October 9, 2026The contains() method of the DOMTokenList interface returns a boolean value — true if the underlying list contains the given…
- October 9, 2026The read-only children property returns a live HTMLCollection which contains all of the child elements of the document fragment upon…
- October 9, 2026The getElementById() method of the DocumentFragment returns an Element object representing the element whose id property matches the specified string.
- October 9, 2026The DocumentFragment.append() method inserts a set of Node objects or strings after the last child of the document fragment.
- October 9, 2026The Document method querySelectorAll() returns a static (not live) NodeList representing a list of the document's elements that match the…
- October 9, 2026The Document method querySelector() returns the first Element within the document that matches the specified CSS selector, or group of…
- October 9, 2026The getElementById() method of the Document interface returns an Element object representing the element whose id property matches the specified…
- October 9, 2026The CustomEvent() constructor creates a new CustomEvent object.
- October 9, 2026The replace() method of the CSSStyleSheet interface asynchronously replaces the content of the stylesheet with the content passed into it.
- October 9, 2026The read-only CSSStyleSheet property cssRules returns a live CSSRuleList which provides a real-time, up-to-date list of every CSS rule which…
- October 9, 2026The CSSStyleSheet.insertRule() method inserts a new CSS rule into the current style sheet.
- October 9, 2026The CSSStyleSheet() constructor creates a new CSSStyleSheet object which represents a single Stylesheet.
- October 9, 2026The CSSStyleDeclaration.getPropertyValue() method interface returns a string containing the value of a specified CSS property.
- October 9, 2026The CSSStyleDeclaration.removeProperty() method interface removes a property from a CSS style declaration object.
- October 9, 2026The CSSStyleDeclaration.setProperty() method interface sets a new value for a property on a CSS style declaration object.
- October 9, 2026The readText() method of the Clipboard interface returns a Promise which fulfills with a copy of the textual contents of…
- October 9, 2026The write() method of the Clipboard interface writes arbitrary ClipboardItem data such as images and text to the clipboard, fulfilling…
- October 9, 2026The read() method of the Clipboard interface requests a copy of the clipboard's contents, fulfilling the returned Promise with the…
- October 9, 2026The Blob() constructor returns a new Blob object.
- October 9, 2026The arrayBuffer() method of the Blob interface returns a Promise that resolves with the contents of the blob as binary…
- October 9, 2026The slice() method of the Blob interface creates and returns a new Blob object which contains data from a subset…
- October 9, 2026The text() method of the Blob interface returns a Promise that resolves with a string containing the contents of the…
- October 9, 2026The abort() method of the AbortController interface aborts an asynchronous operation before it has completed.
- October 9, 2026The AbortSignal.abort() static method returns an AbortSignal that is already set as aborted (and which does not trigger an abort…
- October 9, 2026The AbortSignal.any() static method takes an iterable of abort signals and returns an AbortSignal.
- October 9, 2026The reason read-only property returns a JavaScript value that indicates the abort reason.
- October 9, 2026The delete() method of WeakSet instances removes the specified value from this set, if it is in the set.
- October 9, 2026The has() method of WeakSet instances returns a boolean indicating whether the specified value exists in this WeakSet or not.
- October 9, 2026Parameters: iterable If an iterable object is passed, all of its elements will be added to the new WeakSet. null…
- October 9, 2026The add() method of WeakSet instances inserts the specified value into this set, if it is not already present.
- October 9, 2026A WeakSet is a collection of garbage-collectable values, including objects and non-registered symbols.
- October 9, 2026The has() method of WeakMap instances returns a boolean indicating whether an entry with the specified key exists in this…
- October 9, 2026The set() method of WeakMap instances adds a new entry with a specified key and value to this WeakMap, or…
- October 9, 2026The getOrInsertComputed() method of WeakMap instances returns the value corresponding to the specified key in this WeakMap.
- October 9, 2026The delete() method of WeakMap instances removes the entry specified by the key from this WeakMap.
- October 9, 2026The get() method of WeakMap instances returns the value corresponding to the key in this WeakMap, or undefined if there…
- October 9, 2026The getOrInsert() method of WeakMap instances returns the value corresponding to the specified key in this WeakMap.
- October 9, 2026Parameters: iterable An Array or other iterable object that produces a two-element array-like object whose first element is a value…
- October 9, 2026A WeakMap is a collection of key/value pairs whose keys must be objects or non-registered symbols, with values of any…
- October 9, 2026The URIError object represents an error when a global URI handling function was used in a wrong way.
- October 9, 2026The undefined global property represents the primitive value undefined.
- October 9, 2026The toBase64() method of Uint8Array instances returns a base64-encoded string based on the data in this Uint8Array object.
- October 9, 2026The toHex() method of Uint8Array instances returns a hex-encoded string based on the data in this Uint8Array object.
- October 9, 2026The setFromHex() method of Uint8Array instances populates this Uint8Array object with bytes from a hex-encoded string, returning an object indicating…
- October 9, 2026The Uint8Array typed array represents an array of 8-bit unsigned integers.
- October 9, 2026The Uint8Array.fromBase64() static method creates a new Uint8Array object from a base64-encoded string.
- October 9, 2026The Uint8Array.fromHex() static method creates a new Uint8Array object from a hexadecimal string.
- October 9, 2026The setFromBase64() method of Uint8Array instances populates this Uint8Array object with bytes from a base64-encoded string, returning an object indicating…
- October 9, 2026The TypeError object represents an error when an operation could not be performed, typically (but not exclusively) when a value…
- October 9, 2026The TypedArray[Symbol.species] static accessor property returns the constructor used to construct return values from typed array methods.
- October 9, 2026A TypedArray object describes an array-like view of an underlying binary data buffer.
- October 9, 2026The Symbol.toStringTag static data property represents the well-known symbol Symbol.toStringTag.
- October 9, 2026The Symbol.unscopables static data property represents the well-known symbol Symbol.unscopables.
- October 9, 2026The SyntaxError object represents an error when trying to interpret syntactically invalid code.
- October 9, 2026The Symbol.toPrimitive static data property represents the well-known symbol Symbol.toPrimitive.
- October 9, 2026The Symbol.species static data property represents the well-known symbol Symbol.species.
- October 9, 2026The Symbol.split static data property represents the well-known symbol Symbol.split.
- October 9, 2026The Symbol.replace static data property represents the well-known symbol Symbol.replace.
- October 9, 2026The Symbol.search static data property represents the well-known symbol Symbol.search.
- October 9, 2026The valueOf() method of Symbol values returns this symbol value.
- October 9, 2026The Symbol.toPrimitive method of Symbol values returns this symbol value.
- October 9, 2026The description accessor property of Symbol values returns a string containing the description of this symbol, or undefined if the…
- October 9, 2026The toString() method of Symbol values returns a string representing this symbol value.
- October 9, 2026The Symbol.match static data property represents the well-known symbol Symbol.match.
- October 9, 2026The Symbol.matchAll static data property represents the well-known symbol Symbol.matchAll.
- October 9, 2026The Symbol.isConcatSpreadable static data property represents the well-known symbol Symbol.isConcatSpreadable.
- October 9, 2026The Symbol.iterator static data property represents the well-known symbol Symbol.iterator.
- October 9, 2026The Symbol.keyFor() static method retrieves a shared symbol key from the global symbol registry for the given symbol.
- October 9, 2026The Symbol.for() static method searches for existing symbols in a runtime-wide symbol registry with the given key and returns it…
- October 9, 2026The Symbol.hasInstance static data property represents the well-known symbol Symbol.hasInstance.
- October 9, 2026The Symbol.asyncIterator static data property represents the well-known symbol Symbol.asyncIterator.
- October 9, 2026The Symbol.dispose static data property represents the well-known symbol Symbol.dispose.
- October 9, 2026The Symbol() function returns primitive values of type Symbol.
- October 9, 2026The Symbol.asyncDispose static data property represents the well-known symbol Symbol.asyncDispose.
- October 9, 2026Symbol is a built-in object whose constructor returns a symbol primitive — also called a Symbol value or just a…
- October 9, 2026The length data property of a String value contains the length of the string in UTF-16 code units.
- October 9, 2026The slice() method of String values extracts a section of this string and returns it as a new string, without…
- October 9, 2026The String.raw() static method is a tag function of template literals.
- October 9, 2026The search() method of String values executes a search for a match between a regular expression and this string, returning…
- October 9, 2026The replaceAll() method of String values returns a new string with all matches of a pattern replaced by a replacement.
- October 9, 2026The repeat() method of String values constructs and returns a new string which contains the specified number of copies of…
- October 9, 2026The replace() method of String values returns a new string with one, some, or all matches of a pattern replaced…
- October 9, 2026The padEnd() method of String values pads this string with a given string (repeated and/or truncated, if needed) so that…
- October 9, 2026The padStart() method of String values pads this string with a given string (repeated and/or truncated, if needed) so that…
- October 9, 2026The matchAll() method of String values returns an iterator of all results matching this string against a regular expression, including…
- October 9, 2026The normalize() method of String values returns the Unicode Normalization Form of this string.
- October 9, 2026The match() method of String values retrieves the result of matching this string against a regular expression.
- October 9, 2026The lastIndexOf() method of String values searches this string and returns the index of the last occurrence of the specified…
- October 9, 2026The localeCompare() method of String values returns a number indicating whether this string comes before, or after, or is the…
- October 9, 2026The indexOf() method of String values searches this string and returns the index of the first occurrence of the specified…
- October 9, 2026The isWellFormed() method of String values returns a boolean indicating whether this string contains any lone surrogates.
- October 9, 2026The concat() method of String values concatenates the string arguments to this string and returns a new string.
- October 9, 2026The endsWith() method of String values determines whether a string ends with the characters of this string, returning true or…
- October 9, 2026The includes() method of String values performs a case-sensitive search to determine whether a given string may be found within…
- October 9, 2026The codePointAt() method of String values returns a non-negative integer that is the Unicode code point value of the character…
- October 9, 2026The charCodeAt() method of String values returns an integer between 0 and 65535 representing the UTF-16 code unit at the…
