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File: public/js/lib/vue/src/directives/internal/class.js

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File: public/js/lib/vue/src/directives/internal/class.js
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Description: Auxiliary data
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import { addClass, removeClass, isArray, isObject } from '../../util/index' export default { deep: true, update (value) { if (!value) { this.cleanup() } else if (typeof value === 'string') { this.setClass(value.trim().split(/\s+/)) } else { this.setClass(normalize(value)) } }, setClass (value) { this.cleanup(value) for (var i = 0, l = value.length; i < l; i++) { var val = value[i] if (val) { apply(this.el, val, addClass) } } this.prevKeys = value }, cleanup (value) { const prevKeys = this.prevKeys if (!prevKeys) return var i = prevKeys.length while (i--) { var key = prevKeys[i] if (!value || value.indexOf(key) < 0) { apply(this.el, key, removeClass) } } } } /** * Normalize objects and arrays (potentially containing objects) * into array of strings. * * @param {Object|Array<String|Object>} value * @return {Array<String>} */ function normalize (value) { const res = [] if (isArray(value)) { for (var i = 0, l = value.length; i < l; i++) { const key = value[i] if (key) { if (typeof key === 'string') { res.push(key) } else { for (var k in key) { if (key[k]) res.push(k) } } } } } else if (isObject(value)) { for (var key in value) { if (value[key]) res.push(key) } } return res } /** * Add or remove a class/classes on an element * * @param {Element} el * @param {String} key The class name. This may or may not * contain a space character, in such a * case we'll deal with multiple class * names at once. * @param {Function} fn */ function apply (el, key, fn) { key = key.trim() if (key.indexOf(' ') === -1) { fn(el, key) return } // The key contains one or more space characters. // Since a class name doesn't accept such characters, we // treat it as multiple classes. var keys = key.split(/\s+/) for (var i = 0, l = keys.length; i < l; i++) { fn(el, keys[i]) } }