# is-potential-custom-element-name [](https://travis-ci.org/mathiasbynens/is-potential-custom-element-name) _is-potential-custom-element-name_ checks whether a given string matches [the `PotentialCustomElementName` production](https://html.spec.whatwg.org/multipage/scripting.html#prod-potentialcustomelementname) as defined in the HTML Standard. ## Installation To use _is-potential-custom-element-name_ programmatically, install it as a dependency via [npm](https://www.npmjs.com/): ```bash $ npm install is-potential-custom-element-name ``` Then, `require` it: ```js const isPotentialCustomElementName = require('is-potential-custom-element-name'); ``` ## Usage ```js isPotentialCustomElementName('foo-bar'); // → true isPotentialCustomElementName('Foo-bar'); // → false isPotentialCustomElementName('baz-©'); // → false isPotentialCustomElementName('annotation-xml'); // → true ``` ## Author | [](https://twitter.com/mathias "Follow @mathias on Twitter") | |---| | [Mathias Bynens](https://mathiasbynens.be/) | ## License _is-potential-custom-element-name_ is available under the [MIT](https://mths.be/mit) license.