January 2013
Intermediate to advanced
332 pages
5h 23m
Chinese
Content preview from JAVASCRIPT網頁應用程式設計
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第六章
雖然
utils
模組會被用到兩次（一次是在
require.ensure()
函式裡，一次是透過
application
模組），不過 script 程式很聰明，它只會載入一次模組。別忘了，模組需要
用到的相依模組，都要列進傳輸格式包裝裡面。
RequireJS
除了 Yabble 之 外，RequireJS（
http://requirejs.org
）也是一套非常受歡迎的載入器。
RequireJS 載入模組的做法有些微的不同—它採用的是一種稱為非同步式模組定義
（Asynchronous Module Definition，簡稱 AMD）的格式（
http://wiki.commonjs.org/wiki/
Modules/AsynchronousDefinition
）。會需要特別注意的差異在於：這套 API 是採用 eagerly
模式來取得相依模組，而非 lazily 模式。RequireJS 基本上完全相容於 CommonJS 模組，
只不過它在包裝模組時用的是不同的傳輸格式。
如果要載入 JavaScript 檔案，只要把檔案路徑傳入
require()
函式，再設定一組回叫函
式就可以了。當所有的相依檔案都載入完成之後，就會呼叫這組回叫函式：
<script>
require(["lib/application", "lib/utils"], function(application, utils) {
// 載入完成！
});
</script>
從這段範例程式碼可以看出，載入完成後呼叫的回叫函式 ...
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.