A property is a value or set of values (in the form of an array or object) that is a member of an object. The following sections link to information that explains how to use the properties in JScript.
In This Section
 0...n Properties

Returns the actual value of individual arguments from an arguments object returned by the arguments property of an executing function.
 $1...$9 Properties

Returns the nine mostrecently memorized portions found during pattern matching.
 arguments Property

Returns the arguments object for the currently executing Function object.caller Property
 callee Property

Returns the Function object being executed that is the body text of the specified Function object.
 caller Property

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

Specifies the function that creates an object.
 description Property

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

Returns the mathematical constant e, the base of natural logarithms.
 global Property

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

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

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

Returns an initial value of Number.POSITIVE_INFINITY.
 input Property ($_)

Returns the string against which a regular expression search was performed.
 lastIndex Property

Returns the character position where the next match begins in a searched string.
 lastMatch Property ($&)

Returns the last matched characters from any regular expression search.
 lastParen Property ($+)

Returns the last parenthesized submatch, if any, from any regular expression search.
 leftContext Property ($`)

Returns the characters from the beginning of a searched string up to the position before the beginning of the last match.
 length Property (arguments)

Returns the actual number of arguments passed to a function by the caller.
 length Property (Array)

Returns an integer value one higher than the highest element defined in an array.
 length Property (Function)

Returns the number of arguments defined for a function.
 length Property (String)

Returns the length of a String object.
 LN10 Property

Returns the natural logarithm of 10.
 LN2 Property

Returns the natural logarithm of 2.
 LOG10E Property

Returns the base10 logarithm of e, the base of natural logarithms.
 LOG2E Property

Returns the base2 logarithm of e, the base of natural logarithms.
 MAX_VALUE Property

Returns the largest number representable in JScript. Equal to approximately 1.79E+308.
 message Property

Returns an error message string.
 MIN_VALUE Property

Returns the number closest to zero that JScript can represent. Equal to approximately 5.00E324.
 multiline Property

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

Returns the name of an error.
 NaN Property

A special value that indicates that an arithmetic expression returned a value that was not a number.
 NaN Property (Global)

Returns the special value NaN indicating that an expression is not a number.
 NEGATIVE_INFINITY Property

Returns a value more negative than the largest negative number (Number.MAX_VALUE) that JScript can represent.
 number Property

Returns a value more negative than the largest negative number (Number.MAX_VALUE) that JScript can represent.
 PI Property

Returns the ratio of the circumference of a circle to its diameter, approximately 3.141592653589793.
 POSITIVE_INFINITY Property

Returns a value larger than the largest number (Number.MAX_VALUE) that JScript can represent.
 propertyIsEnumerable Property

Returns a Boolean value indicating whether a specified property is part of an object and if it is enumerable.
 prototype Property

Returns a reference to the prototype for a class of objects.
 rightContext Property ($')

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

Returns a copy of the text of the regular expression pattern.
 SQRT1_2 Property

Returns he square root of 0.5, or one divided by the square root of 2.
 SQRT2 Property

Returns the square root of 2
 undefined Property

Returns an initial value of undefined.