regExp.flags

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

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

See also

• RegExp.prototype.source