Web/JavaScript/Reference/Global objects/RegExp/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. "gimsuy").

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(/[gimsuy]*$/)[0];
    }
  });
}

Specifications

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

Browser compatibility

Update compatibility data on GitHub

	Desktop						Mobile						Server
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	Android webview	Chrome for Android	Firefox for Android	Opera for Android	Safari on iOS	Samsung Internet	Node.js
`flags`	Chrome Full support 49	Edge Full support 79	Firefox Full support 37	IE No support No	Opera Full support 39	Safari Full support 9	WebView Android Full support 49	Chrome Android Full support 49	Firefox Android Full support 37	Opera Android Full support 41	Safari iOS Full support 9	Samsung Internet Android Full support 5.0	nodejs Full support 6.0.0

Legend

Full support: Full support
No support: No support