# unicode-canonical-property-names-ecmascript [](https://travis-ci.org/mathiasbynens/unicode-canonical-property-names-ecmascript)_unicode-canonical-property-names-ecmascript_ exports the set of canonical Unicode property names that are supported in [ECMAScript RegExp property escapes](https://github.com/tc39/proposal-regexp-unicode-property-escapes).## InstallationTo use _unicode-canonical-property-names-ecmascript_, install it as a dependency via [npm](https://www.npmjs.com/):```bash$ npm install unicode-canonical-property-names-ecmascript```Then, `require` it:```jsconstproperties=require('unicode-canonical-property-names-ecmascript');```## Example```jsproperties.has('ID_Start');// → trueproperties.has('IDS');// → false```## Author| [](https://twitter.com/mathias "Follow @mathias on Twitter") ||---|| [Mathias Bynens](https://mathiasbynens.be/) |## License_unicode-canonical-property-names-ecmascript_ is available under the [MIT](https://mths.be/mit) license.