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// 判断arr是否为一个数组,返回一个bool值
function isArray (arr) { return Object.prototype.toString.call(arr) === '[object Array]'; }
// 深度克隆
function deepClone (obj) { // 对常见的“非”值,直接返回原来值
if([null, undefined, NaN, false].includes(obj)) return obj; if(typeof obj !== "object" && typeof obj !== 'function') { //原始类型直接返回
return obj; } var o = isArray(obj) ? [] : {}; for(let i in obj) { if(obj.hasOwnProperty(i)){ o[i] = typeof obj[i] === "object" ? deepClone(obj[i]) : obj[i]; } } return o; }
export default deepClone;
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