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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相依性管理（Dependency Management）
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93
目前 CommonJS 的模組傳輸格式仍在演進中，有很多的提案都還處於審查階段。因
此目前並沒有一套「正式版」的模組傳輸格式。現今最常被使用的兩種格式，分別是
Transport C（
http://wiki.commonjs.org/wiki/Modules/AsynchronousDefinition
）和 Transport D
（
http://wiki.commonjs.org/wiki/Modules/Transport/D
）。無論你選用的是本章稍後介紹的哪
一種包裝工具，都得要仔細確認它所用的格式是否有被你所使用的載入器支援。不過倒
也不用太擔心，很多模組載入器都會隨附可相容的包裝工具，即使沒有，通常也會在說
明文件中註明他們所支援的傳輸格式版本為何。
Yabble
Yabble（
https://github.com/jbrantly/yabble
）是一套非常好用，而且輕薄短小的模組載入
器。它提供了兩種載入模組的設定方式：XHR，以及 script 標籤。使用 XHR 載入模組
的好處，是不需要將模組包裝成傳輸格式。不過它的缺點是必須要透過
eval()
來執行，
這會讓 JavaScript 程式變得非常難以除錯。此外，使用 XHR 跨網域載入模組也會有問
題（特別是如果你有使用 CDN 的話）。一般建議最好只在私底下開發一些簡單快速的小
程式時使用 XHR，別在正式環境上使用：
<script src="https://github.com/jbrantly/yabble/raw/master/lib/yabble.js"> ...
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I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
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.