This is an experimental technology, part of the ECMAScript 6 (Harmony) proposal.
Because this technology's specification has not stabilized, check the compatibility table for usage in various browsers. Also note that the syntax and behavior of an experimental technology is subject to change in future version of browsers as the spec changes.
Summary
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
Example: 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 6 (ECMA-262) The definition of 'RegExp.prototype.flags' in that specification. |
Draft | Initial definition. |
Browser compatibility
| Feature | Chrome | Firefox (Gecko) | Internet Explorer | Opera | Safari |
|---|---|---|---|---|---|
| Basic support | Not supported | 37 (37) | Not supported | Not supported | Not supported |
| Feature | Android | Chrome for Android | Firefox Mobile (Gecko) | IE Mobile | Opera Mobile | Safari Mobile |
|---|---|---|---|---|---|---|
| Basic support | Not supported | Not supported | 37.0 (37) | Not supported | Not supported | Not supported |