CSS Pseudo-classes with inline styles
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.
Is it possible to create inline pseudo styles?
Unfortunately no, you can't implement hover effects using inline CSS.
A (poor) work-around for this problem is to have your controls render style blocks when they are rendered. For example, your control could render as:
<style type="text/css">
.custom-class { background-color:green; }
.custom-class:hover { background-color:Red; }
</style>
<a href="#" class="custom-class">Coding Horror</a>
If you could force your users to drop a "style control" at the top of their pages you could render all your custom classes there instead of rendering them next to each control, which would be a very, very bad thing (browsers will restart rendering every time they come across a style block, having a lot of style blocks scattered around your page will cause slow rendering).
Unfortunately there's no elegant solution to this problem.
how to create inline style with :before and :after
You can't. With inline styles you are targeting the element directly. You can't use other selectors there.
What you can do however is define different classes in your stylesheet that define different colours and then add the class to the element.
CSS pseudo-element in inline attribute style
It’s not possible. The working draft you are referring to is over 12 years old. Click on the link “Latest version” in it, and you’ll find the CSS Style Attributes, a W3C Recommendation (“W3C standard”). It was approved recently. It contains no changes to the style
attribute as in HTML specs, and this is indeed the message: the attribute has not been enhanced, and there are no plans to do so.
The conclusions depend on why you would use the construct. Normally, just assign an id
attribute to the element and use an id
selector in CSS.
CSS Pseudo-classes with inline styles in react.js
In HTML & CSS
.testAfter::after { content: "->" }
<div class="testAfter">Something</div>
Use :after selective for inline style setting
You cannot add pseudo
operator inline Style
, because Pseudo
operators are only workable in CSS classes
and Ids
and you are taking about adding pseudo
operator with style
attribute, which is not possible,
For more information visit this article. this will help you
https://www.w3.org/TR/css-style-attr/
Adding CSS pseudo elements inline
No, it is not possible to apply pseudo selectors via inline CSS, that's only possible from within <style></style>
blocks or external stylesheet file.
Imagine constructing an email template with inline pseudo selector that uses content
property, bad guys could have done the harm I suppose. So it is not possible.
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