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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

  • If you need to know if a string matches a regular expression RegExp, use search().
  • If you only want the first match found, you might want to use RegExp.exec() instead.
  • if you want to obtain capture groups and the global flag is set, you need to use RegExp.exec() instead.


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']


Specification Status Comment
ECMAScript 3rd Edition (ECMA-262) Standard Initial definition. Implemented in JavaScript 1.2.
ECMAScript 5.1 (ECMA-262)
The definition of 'String.prototype.match' in that specification.
ECMAScript 2015 (6th Edition, ECMA-262)
The definition of 'String.prototype.match' in that specification.

Browser compatibility

Feature Chrome Firefox (Gecko) Internet Explorer Opera Safari
Basic support (Yes) (Yes) (Yes) (Yes) (Yes)
Feature Android Chrome for Android Firefox Mobile (Gecko) IE Mobile Opera Mobile Safari Mobile
Basic support (Yes) (Yes) (Yes) (Yes) (Yes) (Yes)

Firefox-specific notes

  • Starting with Gecko 27 (Firefox 27 / Thunderbird 27 / SeaMonkey 2.24), this method has been adjusted to conform with the ECMAScript specification. When match() is called with a global regular expression, the RegExp.lastIndex property (if specified) will be reset to 0 (bug 501739).
  • Starting with Gecko 39 (Firefox 39 / Thunderbird 39 / SeaMonkey 2.36), the non-standard flags argument is deprecated and throws a console warning (bug 1142351). This property is Gecko-only and will be removed in the future.

See also

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