The RegExp.lastMatch static accessor property returns the last matched substring. RegExp["$&"] is an alias for this property.

The fontcolor() method of String values creates a string that embeds this string in a <font> element (<font color="...">str</font>), which causes this string to be displayed in the specified font color.

The trimStart() method of String values removes whitespace from the beginning of this string and returns a new string, without modifying the original string. trimLeft() is an alias of this method.

The RegExp[@@species] static accessor property returns the constructor used to construct copied regular expressions in certain RegExp methods.

The [@@matchAll]() method of RegExp instances specifies how String.prototype.matchAll should behave.

The destructuring assignment syntax is a JavaScript expression that makes it possible to unpack values from arrays, or properties from objects, into distinct variables.

The encodeURI() function encodes a URI by replacing each instance of certain characters by one, two, three, or four escape sequences representing the UTF-8 encoding of the character (will only be four escape sequences for characters composed of two surrogate characters). Compared to encodeURIComponent(), this function encodes fewer characters, preserving those that are part of the URI syntax.

The fr attribute defines the radius of the focal point for the radial gradient.

The Int32Array typed array represents an array of 32-bit signed integers in the platform byte order. If control over byte order is needed, use DataView instead. The contents are initialized to 0. Once established, you can reference elements in the array using the object's methods, or using standard array index syntax (that is, using bracket notation).

The <font-face-src> SVG element corresponds to the src descriptor in CSS @font-face rules. It serves as container for <font-face-name>, pointing to locally installed copies of this font, and <font-face-uri>, utilizing remotely defined fonts.