183

Is it possible to have pseudo-classes using inline styles?


Example:

<a href="http://www.google.com" style="hover:text-decoration:none;">Google</a>

I know the above HTML won't work but is there something similar that will?

P.S. I know I should use an external style sheet, and I do. I was just curious if this could be done using inline styles.

0

3 Answers 3

143

No, this is not possible. In documents that make use of CSS, an inline style attribute can only contain property declarations; the same set of statements that appears in each ruleset in a stylesheet. From the Style Attributes spec:

The value of the style attribute must match the syntax of the contents of a CSS declaration block (excluding the delimiting braces), whose formal grammar is given below in the terms and conventions of the CSS core grammar:

declaration-list
  : S* declaration? [ ';' S* declaration? ]*
  ;

Neither selectors (including pseudo-elements), nor at-rules, nor any other CSS construct are allowed.

Think of inline styles as the styles applied to some anonymous super-specific ID selector: those styles only apply to that one very element with the style attribute. (They take precedence over an ID selector in a stylesheet too, if that element has that ID.) Technically it doesn't work like that; this is just to help you understand why the attribute doesn't support pseudo-class or pseudo-element styles (it has more to do with how pseudo-classes and pseudo-elements provide abstractions of the document tree that can't be expressed in the document language).

Note that inline styles participate in the same cascade as selectors in rule sets, and take highest precedence in the cascade (!important notwithstanding). So they take precedence even over pseudo-class states. Allowing pseudo-classes or any other selectors in inline styles would possibly introduce a new cascade level, and with it a new set of complications.

Note also that very old revisions of the Style Attributes spec did originally propose allowing this, however it was scrapped, presumably for the reason given above, or because implementing it was not a viable option.

Sign up to request clarification or add additional context in comments.

Comments

57

Not CSS, but inline:

<a href="#" 
   onmouseover = "this.style.textDecoration = 'none'"
   onmouseout  = "this.style.textDecoration = 'underline'">Hello</a>

See example →

10 Comments

Yeah, I guess that is another option. It's not CSS but it works for :hover using mouseover and mouseout, :focus using onfocus and onblur, and :active using onclick.
Would this count as javascript? I have a project that requires inline CSS and no Javascript.
Yes this is javascript.
This is a good option. Using an external CSS sheet is against OO(object oriented) principle. An element's style should be put together with the element.
@Evan胡孝义 what if I want this same appearance on several elements. Then the DRY principle of OO suggests extracting it out.... external style sheets! Separating style from structure is not inconsistent with OO.
|
40

Rather than needing inline you could use Internal CSS

<a href="http://www.google.com" style="hover:text-decoration:none;">Google</a>

You could have:

<a href="http://www.google.com" id="gLink">Google</a>
<style>
  #gLink:hover {
     text-decoration: none;
  }
</style>

3 Comments

Is it acceptable to use internal css outside head element?
@Thaina It is now, in HTML5: html5doctor.com/the-scoped-attribute
@Thaina Funny, ran into another question where I decided to do such a thing and found out the scoped attribute has been removed from the specs....developer.mozilla.org/en/docs/Web/HTML/Element/style

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.

Start asking to get answers

Find the answer to your question by asking.

Ask question

Explore related questions

See similar questions with these tags.