javascript 深拷貝

標籤：

 1 //isActiveClone防止循環參考 2 function clone(obj) { 3     if (obj === null || typeof obj !== ‘object‘ || ‘isActiveClone‘ in obj) { 4         return obj; 5     } 6  7     var temp = obj.constructor(); //使temp的prototype與obj的相同 8  9     for (var key in obj) {10         if (Object.prototype.hasOwnProperty.call(obj, key)) {11             obj[‘isActiveClone‘] = null;12             temp[key] = clone(obj[key]);13             delete obj[‘isActiveClone‘];14         }15     }16     return temp;17 }

 

javascript 深拷貝