The regExp Object [3|I]
The regExp object is relevant to searching for regular expressions. Its properties are set before or after a search is performed. They don't generally exercise control over the search itself, but instead articulate a series of values that can be accessed throughout the search.
Properties
input— The string against which a regular expression is matched. New in JavaScript 1.2 and later.
multiline [true, false]— Sets whether the search continues beyond line breaks on multiple lines (true) or not (false). New in JavaScript 1.2 and later.
lastMatch— Indicates the characters last matched. New in JavaScript 1.2 and later.
lastParen— Indicates the last matched string that appeared in parentheses. New in JavaScript 1.2 and later.
leftContext— ...
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