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. "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

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See also