June 2014
Intermediate to advanced
488 pages
9h 56m
Chinese
Content preview from MOBILE HTML5學習手冊
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26
|
第二章
有一些屬性幾乎可讓所有 HTML 元素使用—包括核心或全域的屬性，以及國際化
（internationalization）的屬性（於下一節討論），有一些屬性屬於某些元素，我們會在
第三章討論它們。
全域與國際化屬性
HTML5 加入一些幾乎可套用到所有元素的國際化及核心屬性。
id
、
class
、
title
、
style
、
lang
，與
dir
屬性仍然可支援所有元素。HTML5 的核心屬性加入了
accesskey
、
hidden
與
tabindex
以及五種推薦的互動屬性：
contenteditable
、
contextmenu
、
spellcheck
、
draggable
與
dropzone
。接下來將會討論這些屬性。
除了全域屬性之外，所有元素都可以使用 microdata（微資料）屬性、WIA-ARIA 角色
與
aria-
屬性，以及自訂資料屬性，它們的寫法是
data-*
，其中的
*
由你建立，是你自
創的屬性。HTML5 加入了
data-
前置詞來讓開發人員建立不會與未來版的 HTML 衝突
的屬性。第 33 頁將會討論
data-*
屬性。microdata 與 ARIA 存取屬性會在第六章討論。
id
id
屬性是獨一無二的識別符。在同一個文件中，不能有兩個元素擁有同樣的
id
，而且元
素最多只能有一個
id
。在 HTML5，
id
值必須至少有一個字元，而且不能有空格。這與
之前的版本不同，在之前的版本中，
id
值必須以 A-Z 或 a-z 的字母開頭，之後可有字母
（A-Za-z）、數字（0-9）、連字號（-）、底線（ ...
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