请尝试
http://jsfiddle.net/bpH6Z/4/。
我已经在Object.prototype.__watch中更新了您重新定义的getter/setter,同时目前您的处理程序需要返回新值。
更新:现在您的处理程序不需要返回新设置的值。
当前代码:
Object.defineProperty(Object.prototype, "__watch", {
enumerable: false,
configurable: true,
writable: false,
value: function(prop, handler) {
var val = this[prop],
getter = function() {
return val;
},
setter = function(newval) {
val = newval;
handler.call(this, prop, newval);
return newval;
};
if (delete this[prop]) {
Object.defineProperty(this, prop, {
get: getter,
set: setter,
enumerable: true,
configurable: true
});
}
}
});
var Controller = function () {
this._bind = function (DOMelement, propertyName) {
var _ctrl = this;
$(DOMelement).on("change input propertyChange", function(e) {
e.preventDefault();
_ctrl[propertyName] = DOMelement.val();
});
};
this._watch = function(DOMelement, propertyName) {
this.__watch(propertyName, function(property, value) {
$(DOMelement).val(value);
});
};
};
var ctrl = new Controller();
ctrl.secret = 'null';
ctrl._bind($('#text1'), 'secret');
ctrl._watch($('#text2'), 'secret');
$('#button1').click(function() {
$('#output').html('Secret is : ' + ctrl.secret);
});
当前的HTML:
<html>
<head></head>
<body>
value: <input type="text" id="text1" /><br />
copy: <input type="text" id="text2" /><br />
<input type="button" id="button1" value="View value"><br />
<span id="output"></span>
</body>
</html>