JavaScript浅层克隆与深度克隆实现原理及代码示例

var obj = {
        name : 'xiaoming',
        age : 12,
        children : ['mimi','lili','rokey']
      }
      var obj2 = {};

      function clone(origin, target) {
        var target = target || {};
         for(var prop in origin) {
           target[prop] = origin[prop];
         }
         return target;
      }

      clone(obj, obj2);

function deepClone(origin, target) {
        var target = target || {},
          toStr = Object.prototype.toString,
          arrStr = '[object Array]';
        for(var prop in origin) {
          if(origin.hasOwnProperty(prop)) {   //判断是不是对象自带的属性
            if(origin[prop] !== 'null' && typeof(origin[prop]) == 'object') {
              if(toStr.call(origin[prop]) == arrStr) {
                target[prop] = [];
              }else {
                target[prop] = {};
              }
              deepClone(origin[prop], target[prop]);
            }else {
              target[prop] = origin[prop];
            }
          }
        }
        return target;
      }