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
.script('/js/jquery.js').wait()
.script('/js/jquery-ui.js')
.script('/js/vapor.js');
</script>
這段範例程式碼裡的所有 script 檔案，都會以並行傳輸的方式載入網頁，不過 LABjs 能
保證
jquery.js
一定會比
jquery-ui.js
和
vapor.js
先被執行。這套 API 非常簡潔，如果想知
道更多進階功能（像是支援 inline scripts），可以閱讀官方網站所提供的說明文件（
http://
labjs.com/documentation.php
)。
一閃而過的網頁素顏（FUBC）
在使用上述任一種 script 載入器時，都需要特別注意一個地方：使用者可能會在載入
網頁的過程中，看到「一閃而過的網頁素顏」（Flash of Unbehaviored Content，簡稱
FUBC）—也就是說，在還沒開始執行任何 JavaScript 程式碼之前，未經任何程式處理
過的網頁，可能會很短暫的出現在使用者眼前。如果沒有透過任何 JavaScript 程式調整
網頁元件的 CSS 樣式或其他內容，可以不用擔心這種狀況。不過如果有，倒也不是沒有
辦法解決。可以先替網頁元件設定一些初始的 CSS 樣式，也可以在載入網頁時隱藏一些
網頁元件，或是在載入網頁時，讓使用者看到一個呈現「載入中」的畫面。
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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.
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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.