HTML元素ID的合法字符是什么? [英] What are legal characters for an HTML element id?
问题描述
我可以在HTML元素的标识符中使用哪些字符?
What characters can I use in an identifier for an HTML element?
例如:
< SPAN id =section [5] ...>
(或者我应该坚持使用某些字符来确保 id
适用于所有主流浏览器/ JavaScript引擎)。
(Or rather, should I stick to certain characters to make sure the id
works across all major browsers/JavaScript engine).
推荐答案
在HTML5中,唯一的限制是ID在文档中必须是唯一的,至少包含一个字符,空间。请参见 http://www.w3.org/TR/2014 /REC-html5-20141028/dom.html#the-id-attribute
In HTML5, the only restrictions are that the ID must be unique within the document, contain at least one character and contain no spaces. See http://www.w3.org/TR/2014/REC-html5-20141028/dom.html#the-id-attribute
如其他答案所指出的,HTML 4更具限制性,并指定
As other answers have pointed out, HTML 4 is more restrictive and specifies that
ID和NAME令牌必须以字母([A-Za-z])开头,后跟任意数量的字母,数字([0-9]),连字符( - ),下划线(_),冒号(:)和句点(。)。
ID and NAME tokens must begin with a letter ([A-Za-z]) and may be followed by any number of letters, digits ([0-9]), hyphens ("-"), underscores ("_"), colons (":"), and periods (".").
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