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@ -1,6 +1,101 @@ |
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import {isEmpty, getInitialValue, debounce, bindThis, deepClone} from "el-admin-layout/src/util" |
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/** |
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* 判断是否为空值，undefined、null、'' 都视为空值 |
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* |
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* @param str 不定参数 |
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* @return {boolean} 若为空值，返回true，否则返回false |
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*/ |
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export function isEmpty(...str) { |
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return str.some(i => i === undefined || i === null || i === '') |
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} |
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/** |
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* 根据传入值的类型，返回基础起始值 |
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* |
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* @param v |
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* @return {boolean|{}|string|*[]|number|null} |
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*/ |
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export function getInitialValue(v) { |
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if (v === undefined || v === null) return null |
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if (typeof v === 'string') return '' |
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if (typeof v === 'boolean') return false |
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if (typeof v === 'number') return 0 |
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if (typeof v === 'object') return {} |
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if (Array.isArray(v)) return [] |
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} |
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export {isEmpty, getInitialValue, debounce, bindThis, deepClone} |
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/** |
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* 防抖 |
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* |
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* @param func {function} 原函数 |
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* @param wait {number} 防抖间隔，单位毫秒 |
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* @param immediate {boolean} 是否立即执行一次 |
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* @return {function} 经过防抖包装后的函数 |
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*/ |
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export function debounce(func, wait = 100, immediate = false) { |
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let timeout, args, context, timestamp, result |
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const later = function () { |
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// 据上一次触发时间间隔
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const last = new Date().getTime() - timestamp |
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// 上次被包装函数被调用时间间隔 last 小于设定时间间隔 wait
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if (last < wait && last > 0) { |
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timeout = window.setTimeout(later, wait - last) |
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} |
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else { |
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timeout = null |
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// 如果设定为immediate===true，因为开始边界已经调用过了此处无需调用
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if (!immediate) { |
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result = func.apply(context, args) |
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if (!timeout) context = args = null |
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} |
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} |
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} |
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return function () { |
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context = this |
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args = arguments |
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timestamp = new Date().getTime() |
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const callNow = immediate && !timeout |
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// 如果延时不存在，重新设定延时
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if (!timeout) timeout = window.setTimeout(later, wait) |
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if (callNow) { |
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result = func.apply(context, args) |
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context = args = null |
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} |
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return result |
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} |
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} |
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//将传入对象的所有函数的this绑定为其自身
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export function bindThis(obj, root = obj) { |
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if (!obj || typeof obj !== 'object') return |
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Object.entries(obj).forEach(([k, v]) => { |
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if (typeof v === 'function') { |
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obj[k] = v.bind(root) |
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} |
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bindThis(v, root) |
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}) |
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return obj |
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} |
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export function deepClone(source) { |
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if (source === null || typeof source !== 'object' || source instanceof Promise) { |
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return source |
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} |
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if (Array.isArray(source)) { |
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return source.map(i => deepClone(i)) |
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} |
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return Object.keys(source).reduce((obj, key) => { |
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obj[key] = deepClone(source[key]) |
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return obj |
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}, {}) |
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} |
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/** |
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* 当传入空值时，返回默认值 |
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toesbieya
6 years ago