The match() method retrieves the matches when matching a string against a regular expression.




A regular expression object. If a non-RegExp object obj is passed, it is implicitly converted to a RegExp by using new RegExp(obj).

Return value

An Array containing the matched results or null if there were no matches.


If the regular expression does not include the g flag, returns the same result as RegExp.exec(). The returned Array has an extra input property, which contains the original string that was parsed. In addition, it has an index property, which represents the zero-based index of the match in the string.

If the regular expression includes the g flag, the method returns an Array containing all matched substrings rather than match objects. Captured groups are not returned. If there were no matches, the method returns null.

See also: RegExp methods


Using match()

In the following example, match() is used to find 'Chapter' followed by 1 or more numeric characters followed by a decimal point and numeric character 0 or more times. The regular expression includes the i flag so that case will be ignored.

var str = 'For more information, see Chapter';
var re = /(chapter \d+(\.\d)*)/i;
var found = str.match(re);


// logs ['Chapter', 'Chapter', '.1']

// 'Chapter' is the first match and the first value 
// remembered from `(Chapter \d+(\.\d)*)`.

// '.1' is the last value remembered from `(\.\d)`.

Using global and ignore case flags with match()

The following example demonstrates the use of the global and ignore case flags with match(). All letters A through E and a through e are returned, each its own element in the array.

var str = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz';
var regexp = /[A-E]/gi;
var matches_array = str.match(regexp);

// ['A', 'B', 'C', 'D', 'E', 'a', 'b', 'c', 'd', 'e']

Firefox-specific notes

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