将css类添加到有效的html / css标记中

Question

Is adding a css class to a <b> tag valid html/css

Example, can I do this:

<b class="myclass"> Foo Bar </b>

Is this valid html/css?
I need to add a class to a b tag as an identifier so I can use it in jQuery/js. It wont have any css styles

Answer 1

Yes , b tag can have all global attributes , including class . The full list of attributes, you can add to b element:

• accesskey
• class
• contenteditable
• contextmenu
• dir
• draggable
• dropzone
• hidden
• id
• inert
• itemid
• itemprop
• itemref
• itemscope
• itemtype
• lang
• spellcheck
• style
• tabindex
• title
• translate

You can also use any custom data attributes .

Finally, you can add also ARIA role attribute.

Answer 2

Of course. There's nothing wrong with that.

However, it's generally a bad idea to use class purely for identifying an element. Consider using something like data-reference or something, as this will be more correct (and more efficient on the browser not having to keep track of a class that's not used as a class)

Answer 3

Yes, this is perfectly valid. Absolutely nothing wrong with it.

Answer 4

There's nothing strictly wrong with it, except that the <b> bold tag is deprecated, in favor of using the <strong> tag.

I never give the strong (or b) tag a class because I only use it when I want the text strong to call attention to it, similar to <em> emphasizing words in text.

If I am bolding or emphasizing the text for some other reason I use a div or span with a class — for example, it is common to italicize the title of a book or article, and in that case I do not use <em> around the title, I use <span class="title">This Is That Title</span> to semantically mark what this thing is, then use a stylesheet to say "titles are italic".

Answer 5

There are no “CSS classes”. CSS has class selectors, but that's a different issue and postulates the existence of a class attribute in a markup language. Thus, the question is meaningless as far as CSS is considered.

In HTML, the class attribute is valid (formally correct) on b elements, in any HTML version from HTML 4.0 (which introduced the attribute) onwards. Whether it makes sense or not is a different issue, but there are no formal restrictions on its use. Although class is most often used for styling, it can be used for other purposes, too, especially in scripting.