問題描述

var obj = {};Object.defineProperty(obj, 'name', { get : function(){ return this._name;}, set: function(val){ this._name = val;}});

那如何監聽 var string='a' 的string變量變化呢？

問題解答

Object.defineProperty(window, 'mystring', { get : function(){ console.log('get');return this._name;}, set: function(val){ console.log('set');this._name = val;}});