How CSS level 4 selectors could boost devs’ powers

What makes this selector even more useful is when we combine it with :notto identify external links:

You can even use it to add an icon to clearly indicate which links will direct the user to an external site. With CSS level 4, we can style the indeterminate state as well –

The pseudo­class can also be used to style the indeterminate state of progress element when no value attribute is included. CSS is becoming a kind of Swiss Army knife for the web. For example, if we want to apply the same link colour to the different states of an anchor, we can simply do:

This is a cleaner way of writing the same rule without :matches. So start experimenting! Times are changing. They are used for targeting time­dimensional elements such as during speech rendering of a HTML document. We can already use a range of helpful selectors such as :nth­child, :nth­of­type and :not() to target specific DOM elements. One thing to bear in mind is that only compound selectors are allowed as arguments, and you cannot use combinator selectors such as the sibling or descendant selectors. For example, if the address is and we have the following styles:

The link will be red, and will be blue. At the time of writing, these selectors haven’t yet been implemented by any browsers and the specification is constantly changing – but fear not, you can use polyfills such as Sel to get a sneak peek of what these selectors are about. She loves talking to others about CSS, which has led her to co-found the meet-up group SydCSS. The good news is you can actually try out this out now – Mozilla has implemented ­-moz-­any- ­which is the equivalent of :matches, and it’s been around since Firefox 4. Firstly, there’s the :matches pseudo­class. More power for developers
The ability to style form elements has become more powerful as well with the addition of the pseudo­class :indeterminate. With CSS level 4 selectors, there will be an extra layer of power. For example, we can use :currentto render text that is currently being rendered in HTML5 video subtitles:

If we want to target previously rendered element, we can use :past. It is used to identify internal links and you can pass in a number as a parameter to target the different levels of the URL.

Updated: 08.11.2014 — 23:56