RegExp.prototype.flags

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 2017 Draft (ECMA-262)
The definition of 'RegExp.prototype.flags' in that specification.
Draft  

Browser compatibility

Feature Chrome Firefox (Gecko) Internet Explorer Opera Safari
Basic support No support 37 (37) No support No support No support
Feature Android Chrome for Android Firefox Mobile (Gecko) IE Mobile Opera Mobile Safari Mobile
Basic support No support No support 37.0 (37) No support No support No support

See also

Document Tags and Contributors

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