The flags property returns a string consisting of the flags of the current regular expression object.

Property attributes of RegExp.prototype.flags
Writable no
Enumerable no
Configurable yes

Description

Flags in the flags property are sorted alphabetically (from left to right, e.g. "gimuy").

Examples

Using flags

/foo/ig.flags;   // "gi"
/bar/myu.flags;  // "muy"

Polyfill

if (RegExp.prototype.flags === undefined) {
  Object.defineProperty(RegExp.prototype, 'flags', {
    configurable: true,
    get: function() {
      return this.toString().match(/[gimuy]*$/)[0];
    }
  });
}

Specifications

Specification Status Comment
ECMAScript 2015 (6th Edition, ECMA-262)
The definition of 'RegExp.prototype.flags' in that specification.
Standard Initial definition.
ECMAScript Latest Draft (ECMA-262)
The definition of 'RegExp.prototype.flags' in that specification.
Living Standard  

Browser compatibility

FeatureChromeEdgeFirefoxInternet ExplorerOperaSafari
Basic support Yes Yes37 No Yes Yes
FeatureAndroid webviewChrome for AndroidEdge mobileFirefox for AndroidIE mobileOpera AndroidiOS Safari
Basic support Yes Yes Yes37 No Yes Yes

See also

Document Tags and Contributors

 Contributors to this page: fscholz, jameshkramer, kdex, isonic, ziyunfei, Mingun
 Last updated by: fscholz,