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27 lines
566 B
JavaScript
27 lines
566 B
JavaScript
/**
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* The `classList` utility creates a list of class names by joining an object's
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* keys, but only for values which are truthy.
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*
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* @example
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* classList({ foo: true, bar: false, qux: 'qaz' });
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* // "foo qux"
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*
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* @param {Object} classes
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* @return {String}
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*/
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export default function classList(classes) {
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let classNames;
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if (classes instanceof Array) {
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classNames = classes.filter((name) => name);
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} else {
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classNames = [];
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for (const i in classes) {
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if (classes[i]) classNames.push(i);
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}
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}
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return classNames.join(' ');
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}
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