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JavaScript Properties

The following table lists JavaScript properties.

Property

Description

JavaScript object

0...n Properties

Returns the value of individual arguments from an arguments object.

arguments

$1...$9 Properties

Returns the nine most-recently memorized portions found during pattern matching.

RegExp

arguments Property

Returns an array containing each argument passed to the currently executing function.

Function

callee Property

Returns the Function object being executed.

arguments

caller Property

Returns a reference to the function that invoked the current function.

Function

constructor Property

Specifies the function that creates an object.

Multiple

description Property

Returns or sets the descriptive string associated with a specific error.

Error

global Property

Returns a Boolean value indicating the state of the global flag (g) used with a regular expression.

Regular Expression

ignoreCase Property

Returns a Boolean value indicating the state of the ignoreCase flag (i) used with a regular expression.

Regular Expression

index Property

Returns the character position where the first successful match begins in a searched string.

RegExp

input Property

Returns the string against which a search was performed.

RegExp

lastIndex Property

Returns the character position where the last successful match begins in a searched string.

RegExp

lastMatch Property

Returns the last matched characters from any regular expression search.

RegExp

lastParen Property

Returns the last parenthesized submatch from any regular expression search, if any.

RegExp

leftContext Property

Returns the characters from the beginning of a searched string up to the position before the beginning of the last match.

RegExp

length Property (arguments)

Returns the actual number of arguments passed to a function by the caller.

arguments

length Property (Array)

Returns an integer value one higher than the highest element defined in an array.

Array

length Property (Function)

Returns the number of arguments defined for a function.

Function

length Property (String)

Returns the length of a String object.

String

message Property

Returns an error message string.

Error

multiline Property

Returns a Boolean value indicating the state of the multiline flag (m) used with a regular expression.

Regular Expression

name Property

Returns the name of an error.

Error

number Property

Returns or sets the numeric value associated with a specific error.

Error

prototype Property

Returns a reference to the prototype for a class of objects.

Multiple

rightContext Property

Returns the characters from the position following the last match to the end of the searched string.

RegExp

source Property

Returns a copy of the text of the regular expression pattern.

Regular Expression

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