js 深度克隆

const deepClone = function (obj) {
    // 先检测是不是数组和Object
    // let isArr = Object.prototype.toString.call(obj) === '[object Array]';
    let isArr = Array.isArray(obj);
    let isJson = Object.prototype.toString.call(obj) === '[object Object]';
    if (isArr) {
        // 克隆数组
        let newObj = [];
        for (let i = 0; i < obj.length; i++) {
            newObj[i] = deepClone(obj[i]);
        }
        return newObj;
    } else if (isJson) {
        // 克隆Object
        let newObj = {};
        for (let i in obj) {
            newObj[i] = deepClone(obj[i]);
        }
        return newObj;
    }
    // 不是引用类型直接返回
    return obj;
};

Object.prototype.deepClone = function () {
    return deepClone(this);
};
Object.defineProperty(Object.prototype, 'deepClone', { enumerable: false });