open-consul/ui/packages/consul-ui/app/helpers/class-map.js

19 lines
649 B
JavaScript

import { helper } from '@ember/component/helper';
/**
* Conditionally maps classInfos (classes) to a string ready for typical DOM
* usage (i.e. space delimited)
*
* @typedef {([string, boolean] | [string])} classInfo
* @param {(classInfo | string)[]} entries - An array of 'entry-like' arrays of `classInfo`s to map
*/
const classMap = (entries) => {
const str = entries
.filter(Boolean)
.filter((entry) => (typeof entry === 'string' ? true : entry[entry.length - 1]))
.map((entry) => (typeof entry === 'string' ? entry : entry[0]))
.join(' ');
return str.length > 0 ? str : undefined;
};
export default helper(classMap);