js深度克隆对象

js深度克隆对象简单的记录一下,如下代码：

var obj = {  typeOf: function(obj) {    const toString = Object.prototype.toString;    const map = {      '[object Boolean]': 'boolean',      '[object Number]': 'number',      '[object String]': 'string',      '[object Function]': 'function',      '[object Array]': 'array',      '[object Date]': 'date',      '[object RegExp]': 'regExp',      '[object Undefined]': 'undefined',      '[object Null]': 'null',      '[object Object]': 'object'    };    return map[toString.call(obj)];  },  deepCopy(data) {    const t = this.typeOf(data);    let o,      i;    if (t === 'array') {      o = [];    } else if (t === 'object') {      o = {};    } else {      return data;    }    if (t === 'array') {      for (let i = 0; i < data.length; i++) {        o.push(this.deepCopy(data[i]));      }    } else if (t === 'object') {      for (i in data) {        o[i] = this.deepCopy(data[i]);      }    }    return o;  }};