Microsoft® JScript™ lastIndex Property (Regular Expression) | Language Reference Version 3

See Also Applies To

##### Description

> Specifies the index at which to start the next match.

##### Syntax

> rgexp.lastIndex [= index]

> The lastIndex property syntax has these parts:

> Part | Description
> rgexp | Required. A Regular Expression object. Can be a variable name or a literal.
> index | The index from which to begin the next search.

##### Remarks

> The lastIndex property is modified by the exec method, and the match, replace, and split methods of the String object.

> The following rules apply to values of lastIndex:

> - If lastIndex is greater than the length of the string, the test and exec methods fail, and lastIndex is set to zero.
> - If lastIndex is equal to the length of the string, the regular expression matches if the pattern matches the empty string. Otherwise, the match fails and lastIndex is reset to zero.
> - Otherwise, lastIndex is set to the next position following the most recent match.

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