The [@@matchAll] method returns all matches of the regular expression against a string.




A String that is a target of the match.

Return value

An iterator.


This method is called internally in String.prototype.matchAll(). For example, the following two examples return same result.



This method exists for customizing match behavior within RegExp subclasses.


Direct call

This method can be used in almost the same way as String.prototype.matchAll(), except the different this and the different arguments order.

var re = /[0-9]+/g;
var str = '2016-01-02';
var result = re[Symbol.matchAll](str);

console.log(Array.from(result, x => x[0]));  
// ["2016", "01", "02"]

Using @@matchAll in subclasses

Subclasses of RegExp can override the [@@matchAll]() method to modify the default behavior.

For example, to return an Array instead of an iterator:

class MyRegExp extends RegExp {
  [Symbol.matchAll](str) {
    var result = RegExp.prototype[Symbol.matchAll].call(this, str);
    if (!result) { 
      return null;
    } else {
      return Array.from(result);

var re = new MyRegExp('([0-9]+)-([0-9]+)-([0-9]+)', 'g');
var str = '2016-01-02|2019-03-07';
var result = str.matchAll(re);
console.log(result[0]); // [ "2016-01-02", "2016", "01", "02" ]
console.log(result[1]); // [ "2019-03-07", "2019", "03", "07" ]


ECMAScript (ECMA-262)
The definition of 'RegExp.prototype[@@matchAll]' in that specification.

Browser compatibility

Update compatibility data on GitHub
ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidFirefox for AndroidOpera for AndroidSafari on iOSSamsung InternetNode.js
@@matchAllChrome Full support 73Edge Full support 79Firefox Full support 67IE No support NoOpera Full support 60Safari No support NoWebView Android Full support 73Chrome Android Full support 73Firefox Android Full support 67Opera Android Full support 52Safari iOS No support NoSamsung Internet Android Full support 5.0nodejs Full support 12.0.0


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See also