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JAVASCRIPT網頁應用程式設計
book

JAVASCRIPT網頁應用程式設計

by Alex MacCaw
January 2013
Intermediate to advanced
332 pages
5h 23m
Chinese
GoTop Information, Inc.
Content preview from JAVASCRIPT網頁應用程式設計
檢視器(View)與模版(Template
|
87
object.change(function(){
console.log("Changed!", this);
// 更新檢視器內容
});
object.change();
object.name = "Bar";
object.change();
設定好物件的
change()
回叫函式後,就可以透過它來繫結、觸發
change
事件。
繫結模型
讓我們再改良一下先前的範例程式,把繫結模型的概念也加進去。每當有人新增、修改
或刪除模型裡的資料時,就觸發
change
事件並重新產生檢視器的內容。此外,還要新增
一組
User
類別,替它設定事件繫結和觸發機制、讓它監聽
change
事件。這麼一來,只
change
事件被觸發,就會重新產生檢視器的內容:
<script>
var User = function(name){
this.name = name;
};
User.records = []
User.bind = function(ev, callback) {
var calls = this._callbacks || (this._callbacks = {});
(this._callbacks[ev] || (this._callbacks[ev] = [])).push(callback);
};
User.trigger = function(ev) {
var list, calls, i, l;
if (!(calls ...
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Publisher Resources

ISBN: 9789862766811