:has – CSS-Tricks

Taming the Cascade With BEM and Modern CSS Selectors

Liam Johnston — Mon, 21 Nov 2022 13:59:15 +0000

BEM. Like seemingly all techniques in the world of front-end development, writing CSS in a BEM format can be polarizing. But it is – at least in my Twitter bubble – one of the better-liked CSS methodologies.

Personally, I think BEM is good, and I think you should use it. But I also get why you might not.

Regardless of your opinion on BEM, it offers several benefits, the biggest being that it helps avoid specificity clashes in the CSS Cascade. That’s because, if used properly, any selectors written in a BEM format should have the same specificity score (0,1,0). I’ve architected the CSS for plenty of large-scale websites over the years (think government, universities, and banks), and it’s on these larger projects where I’ve found that BEM really shines. Writing CSS is much more fun when you have confidence that the styles you’re writing or editing aren’t affecting some other part of the site.

There are actually exceptions where it is deemed totally acceptable to add specificity. For instance: the :hover and :focus pseudo classes. Those have a specificity score of 0,2,0. Another is pseudo elements — like ::before and ::after — which have a specificity score of 0,1,1. For the rest of this article though, let’s assume we don’t want any other specificity creep. 🤓

But I’m not really here to sell you on BEM. Instead, I want to talk about how we can use it alongside modern CSS selectors — think :is(), :has(), :where(), etc. — to gain even more control of the Cascade.

What’s this about modern CSS selectors?

The CSS Selectors Level 4 spec gives us some powerful new(ish) ways to select elements. Some of my favorites include :is(), :where(), and :not(), each of which is supported by all modern browsers and is safe to use on almost any project nowadays.

:is() and :where() are basically the same thing except for how they impact specificity. Specifically, :where() always has a specificity score of 0,0,0. Yep, even :where(button#widget.some-class) has no specificity. Meanwhile, the specificity of :is() is the element in its argument list with the highest specificity. So, already we have a Cascade-wrangling distinction between two modern selectors that we can work with.

The incredibly powerful :has() relational pseudo-class is also rapidly gaining browser support (and is the biggest new feature of CSS since Grid, in my humble opinion). However, at time of writing, browser support for :has() isn’t quite good enough for use in production just yet.

Lemme stick one of those pseudo-classes in my BEM and…

/* ❌ specificity score: 0,2,0 */
.something:not(.something--special) {
  /* styles for all somethings, except for the special somethings */
}

Whoops! See that specificity score? Remember, with BEM we ideally want our selectors to all have a specificity score of 0,1,0. Why is 0,2,0 bad? Consider a similar example, expanded:

.something:not(a) {
  color: red;
}
.something--special {
  color: blue;
}

Even though the second selector is last in the source order, the first selector’s higher specificity (0,1,1) wins, and the color of .something--special elements will be set to red. That is, assuming your BEM is written properly and the selected element has both the .something base class and .something--special modifier class applied to it in the HTML.

Used carelessly, these pseudo-classes can impact the Cascade in unexpected ways. And it’s these sorts of inconsistencies that can create headaches down the line, especially on larger and more complex codebases.

Dang. So now what?

Remember what I was saying about :where() and the fact that its specificity is zero? We can use that to our advantage:

/* ✅ specificity score: 0,1,0 */
.something:where(:not(.something--special)) {
  /* etc. */
}

The first part of this selector (.something) gets its usual specificity score of 0,1,0. But :where() — and everything inside it — has a specificity of 0, which does not increase the specificity of the selector any further.

`:where()` allows us to nest

Folks who don’t care as much as me about specificity (and that’s probably a lot of people, to be fair) have had it pretty good when it comes to nesting. With some carefree keyboard strokes, we may wind up with CSS like this (note that I’m using Sass for brevity):

.card { ... }

.card--featured {
  /* etc. */  
  .card__title { ... }
  .card__title { ... }
}

.card__title { ... }
.card__img { ... }

In this example, we have a .card component. When it’s a “featured” card (using the .card--featured class), the card’s title and image needs to be styled differently. But, as we now know, the code above results in a specificity score that is inconsistent with the rest of our system.

A die-hard specificity nerd might have done this instead:

.card { ... }
.card--featured { ... }
.card__title { ... }
.card__title--featured { ... }
.card__img { ... }
.card__img--featured { ... }

That’s not so bad, right? Frankly, this is beautiful CSS.

There is a downside in the HTML though. Seasoned BEM authors are probably painfully aware of the clunky template logic that’s required to conditionally apply modifier classes to multiple elements. In this example, the HTML template needs to conditionally add the --featured modifier class to three elements (.card, .card__title, and .card__img) though probably even more in a real-world example. That’s a lot of if statements.

The :where() selector can help us write a lot less template logic — and fewer BEM classes to boot — without adding to the level of specificity.

.card { ... }
.card--featured { ... }

.card__title { ... }
:where(.card--featured) .card__title { ... }

.card__img { ... }
:where(.card--featured) .card__img { ... }

Here’s same thing but in Sass (note the trailing ampersands):

.card { ... }
.card--featured { ... }
.card__title { 
  /* etc. */ 
  :where(.card--featured) & { ... }
}
.card__img { 
  /* etc. */ 
  :where(.card--featured) & { ... }
}

Whether or not you should opt for this approach over applying modifier classes to the various child elements is a matter of personal preference. But at least :where() gives us the choice now!

What about non-BEM HTML?

We don’t live in a perfect world. Sometimes you need to deal with HTML that is outside of your control. For instance, a third-party script that injects HTML that you need to style. That markup often isn’t written with BEM class names. In some cases those styles don’t use classes at all but IDs!

Once again, :where() has our back. This solution is slightly hacky, as we need to reference the class of an element somewhere further up the DOM tree that we know exists.

/* ❌ specificity score: 1,0,0 */
#widget {
  /* etc. */
}

/* ✅ specificity score: 0,1,0 */
.page-wrapper :where(#widget) {
  /* etc. */
}

Referencing a parent element feels a little risky and restrictive though. What if that parent class changes or isn’t there for some reason? A better (but perhaps equally hacky) solution would be to use :is() instead. Remember, the specificity of :is() is equal to the most specific selector in its selector list.

So, instead of referencing a class we know (or hope!) exists with :where(), as in the above example, we could reference a made up class and the tag.

/* ✅ specificity score: 0,1,0 */
:is(.dummy-class, body) :where(#widget) {
  /* etc. */
}

The ever-present body will help us select our #widget element, and the presence of the .dummy-class class inside the same :is() gives the body selector the same specificity score as a class (0,1,0)… and the use of :where() ensures the selector doesn’t get any more specific than that.

That’s it!

That’s how we can leverage the modern specificity-managing features of the :is() and :where() pseudo-classes alongside the specificity collision prevention that we get when writing CSS in a BEM format. And in the not too distant future, once :has() gains Firefox support (it’s currently supported behind a flag at the time of writing) we’ll likely want to pair it with :where() to undo its specificity.

Whether you go all-in on BEM naming or not, I hope we can agree that having consistency in selector specificity is a good thing!

Taming the Cascade With BEM and Modern CSS Selectors originally published on CSS-Tricks, which is part of the DigitalOcean family. You should get the newsletter.

Creating Animated, Clickable Cards With the :has() Relational Pseudo Class

Brecht De Ruyte — Tue, 25 Oct 2022 14:15:17 +0000

The CSS :has() pseudo class is rolling out in many browsers with Chrome and Safari already fully supporting it. It’s often referred to it as “the parent selector” — as in, we can select style a parent element from a child selector — but there is so much more that :has() can help us solve. One of those things is re-inventing the clickable card pattern many of us love to use from time to time.

We’ll take a look at how :has() can help us handle linked cards, but first…

What is this `:has()` pseudo class?

There is already a bunch of great posts floating around that do an excellent job explaining what :has() is and what it’s used for, but it’s still new enough that we ought to say a few words about it here as well.

:has() is a relational pseudo class that’s part of the W3C Selectors Level 4 working draft. That’s what the parentheses are all about: matching elements that are related to — or, more accurately, contain — certain child elements.

/* Matches an article element that contains an image element */
article:has(img) { }

/* Matches an article element with an image contained immediately within it */
article:has(> img) { }

So, you can see why we might want to call it a “parent” selector. But we can also combine it with other functional pseudo classes to get more specific. Say we want to style articles that do not contain any images. We can combine the relational powers of :has() with the negation powers of :not() to do that:

/* Matches an article without images  */
article:not(:has(img)) { }

But that’s just the start of how we can combine powers to do more with :has(). Before we turn specifically to solving the clickable card conundrum, let’s look at a few ways we currently approach them without using :has().

How we currently handle clickable cards

There are three main approaches on how people create a fully clickable card these days and to fully understand the power of this pseudo class, it’s nice to have a bit of a round-up.

The “Link as a Wrapper” approach

This approach is something used quite frequently. I never use this approach but I created a quick demo to demonstrate it:

CodePen Embed Fallback

There are a lot of concerns here, especially when it comes to accessibility. When users navigate your website using the rotor function, they will hear the full text inside of that element — the heading, the text, and the link. Someone might not want to sit through all that. We can do better. Since HTML5, we can nest block elements inside of an element. But it never feels right to me, especially for this reason.

Pros:

Quick to implement
Semantically correct

Cons:

Accessibility concerns
Text not selectable
A lot of hassle to overwrite styles that you used on your default links

The JavaScript method

Using JavaScript, we can attach a link to our card instead of writing it in the markup. I found this great CodePen demo by costdev who also made the card text selectable in the process:

CodePen Embed Fallback

This approach has a lot of benefits. Our links are accessible on focus and we can even select text. But there are some drawbacks when it comes to styling. If we want to animate those cards, for example, we would have to add :hover styles on our main .card wrapper instead of the link itself. We also would not benefit from the animations when the links are in focus from keyboard tabbing.

Pros:

Can be made perfectly accessible
Ability to select text

Cons:

Requires JavaScript
Right clicking not possible (although could be fixed with some extra scripting)
Will require a lot of styling on the card itself which would not work when focussing the link

The `::after` selector approach

This method requires us to set the card with relative positioning, then set absolute positioning on the link’s ::after pseudo selector of a link. This doesn’t require any JavaScript and is pretty easy to implement:

CodePen Embed Fallback

There are a few drawbacks here, especially when it comes to selecting text. Unless you provide a higher z-index on your card-body, you won’t be able to select text but if you do, be warned that clicking the text will not activate your link. Whether or not you want selectable text is up to you. I think it can be a UX issue, but it depends on the use-case. The text is still accessible to screen readers but my main problem with the method is the lack of animation possibilities.

Pros:

Easy to implement
Accessible link without bloated text
Works on hover and focus

Cons:

Text is not selectable
You can only animate the link as this is the element you’re hovering.

A new approach: Using `::after` with `:has()`

Now that we’ve established the existing approaches for clickable cards, I want to show how introducing :has() to the mix solves most of those shortcomings.

In fact, let’s base this approach on the last one we looked at using ::after on the link element. We can actually use :has() there to overcome that approach’s animation constraints.

Let’s start with the markup:


  
    
  
  
    Some Heading
    Curabitur convallis ac quam vitae laoreet. Nulla mauris ante, euismod sed lacus sit amet, congue bibendum eros. Etiam mattis lobortis porta. Vestibulum ultrices iaculis enim imperdiet egestas.
    
      Read more

I will be keeping things as simple as possible by targeting elements in the CSS instead of classes.

For this demo, we’re going to add an image zoom and shadow to the card on hover, and animate the link with an arrow popping up and while changing the link’s text color. To make this easy, we’re going to add some custom properties scoped on our card. Here’s the basic styling:

/* The card element */
article {
  --img-scale: 1.001;
  --title-color: black;
  --link-icon-translate: -20px;
  --link-icon-opacity: 0;

  position: relative;
  border-radius: 16px;
  box-shadow: none;
  background: #fff;
  transform-origin: center;
  transition: all 0.4s ease-in-out;
  overflow: hidden;
}
/* The link's ::after pseudo */
article a::after {
  content: "";
  position: absolute;
  inset-block: 0;
  inset-inline: 0;
  cursor: pointer;
}

Great! We added an initial scale for the image (--img-scale: 1.001), the initial color of the card heading (--title-color: black) and some extra properties we will use to make our arrow pop out of the link. We’ve also set an empty state of the box-shadow declaration in order to animate it later . This sets up what we need for the clickable card right now, so let’s add some resets and styling to it by adding those custom properties to the elements we want to animate:

article h2 {
  margin: 0 0 18px 0;
  font-family: "Bebas Neue", cursive;
  font-size: 1.9rem;
  letter-spacing: 0.06em;
  color: var(--title-color);
  transition: color 0.3s ease-out;
}
article figure {
  margin: 0;
  padding: 0;
  aspect-ratio: 16 / 9;
  overflow: hidden;
}
article img {
  max-width: 100%;
  transform-origin: center;
  transform: scale(var(--img-scale));
  transition: transform 0.4s ease-in-out;
}
article a {
  display: inline-flex;
  align-items: center;
  text-decoration: none;
  color: #28666e;
}
article a:focus {
  outline: 1px dotted #28666e;
}
article a .icon {
  min-width: 24px;
  width: 24px;
  height: 24px;
  margin-left: 5px;
  transform: translateX(var(--link-icon-translate));
  opacity: var(--link-icon-opacity);
  transition: all 0.3s;
}

.article-body {
  padding: 24px;
}

Let’s be kind to people and also add a screen reader class hidden behind the link:

.sr-only:not(:focus):not(:active) {
  clip: rect(0 0 0 0); 
  clip-path: inset(50%);
  height: 1px;
  overflow: hidden;
  position: absolute;
  white-space: nowrap; 
  width: 1px;
}

Our card is starting to look pretty sweet. It’s time to add a bit of magic to it. With the :has() pseudo class, we can now check if our link is hovered or focused, then update our custom properties and add a box-shadow. With this little chunk of CSS our card really comes to life:

/* Matches an article element that contains a hover or focus state */
article:has(:hover, :focus) {
  --img-scale: 1.1;
  --title-color: #28666e;
  --link-icon-translate: 0;
  --link-icon-opacity: 1;

  box-shadow: rgba(0, 0, 0, 0.16) 0px 10px 36px 0px, rgba(0, 0, 0, 0.06) 0px 0px 0px 1px;
}

See what’s up there? Now we get the updated styles if any child element in the card is hovered or focused. And even though the link element is the only thing that can contain a hover or focus state in the ::after clickable card approach, we can use that to match the parent element and apply the transitions.

And there you have it. Just another powerful use case for the :has() selector. Not only can we match a parent element by declaring other elements as arguments, but we can match also use pseudos to match and style parents as well.

Pros:

Accessible
Animatable
No JavaScript needed
Uses :hover on the correct element

Cons:

Text is not easily selectable.
Browser support is limited to Chrome and Safari (it’s supported in Firefox behind a flag).

Here is a demo using this technique. You might notice an extra wrapper around the card, but that’s just me playing around with container queries, which is just one of those other fantastic things rolling out in all major browsers.

CodePen Embed Fallback

Got some other examples you wish to share? Other solutions or ideas are more than welcome in the comment section.

Creating Animated, Clickable Cards With the :has() Relational Pseudo Class originally published on CSS-Tricks, which is part of the DigitalOcean family. You should get the newsletter.

Implicit Grids, Repeatable Layout Patterns, and Danglers

Geoff Graham — Tue, 02 Aug 2022 13:10:49 +0000

Dave Rupert with some modern CSS magic that tackles one of those classic conundrums: what happens when the CSS for component is unable to handle the content we throw at it?

The specific situation is when a layout grid expects an even number of items, but is supplied with an odd number instead. We’re left with a “dangling” element at the end that throws off the layout. Sounds like what’s needed is some Defensive CSS and Dave accomplishes it.

He reaches for :has() to write a nifty selector that sniffs out the last item in a grid that contains an odd number of items:

.items:has(.item:last-of-type:nth-of-type(odd)) .item:first-of-type { }

Breaking that down:

We have a parent container of .items.
If the container :has() an .item child that is the last of its type,
…and that .item happens to be an odd-numbered instance,
…then select the first .item element of that type and style it!

In this case, that last .item can be set to go full-width to prevent holes in the layout.

If… then… CSS has conditional logic powers! We’re only talking about support for Safari TP and Edge/Chrome Canary at the moment, but that’s pretty awesome.

As chance has it, Temani Afif recently shared tricks he learned while experimenting with implicit grids. By taking advantage of CSS Grid’s auto-placement algorithm, we don’t even have to explicitly declare a fixed number of columns and rows for a grid — CSS will create them for us if they’re needed!

No, Temani’s techniques aren’t alternative solutions to Dave’s “dangler” dilemma. But combining Temani’s approach to repeatable grid layout patterns with Dave’s defensive CSS use of :has(), we get a pretty powerful and complex-looking grid that’s lightweight and capable of handling any number of items while maintaining a balanced, repeatable pattern.

CodePen Embed Fallback

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Meet `:has`, A Native CSS Parent Selector

Chris Coyier — Mon, 12 Jul 2021 19:45:00 +0000

The reasons that are often cited that make container queries difficult or impossible is things like infinite loops—e.g. changing the width of an element, invalidating a container query, which changes the width again, which makes the container query take effect, etc. But that was solved with containment. A “parent selector”, or :has as it is now been officially dubbed (I like it, that’s how jQuery rolled, although Adrian pointed out a tweet noting that it’s more versatile), has traditionally had similar problems. Things like requiring “multiple pass” rendering which is too slow to be acceptable.

Brian Kardell says:

Primarily, even without :has() it’s pretty hard to live up to performance guarantees of CSS, where everything continue to evaluate and render “live” at 60fps. If you think, mathematically, about just how much work is conceptually involved in applying hundreds or thousands of rules as the DOM changes (including as it is parsing), it’s quite a feat as is.

Engines have figured out how to optimize this based on clever patterns and observations that avoid the work that is conceptually necessary – and a lot of that is sort of based on these subject invariants that has() would appear to throw to the wind.

The fact that there is a spec now is super encouraging, and that it has Igalia’s eye on it. Apparently, some of the performance problems have either been surmounted or, through testing, determined to be negligible enough to remain a shippable feature.

Adrian Bece digs into it all!

The team at Igalia has worked on some notable web engine features like CSS grid and container queries, so there is a chance for :has selector to see the light of day, but there is still a long way to go.
What makes relational selector one of the most requested features in the past few years and how are the developers working around the missing selector? In this article, we’re going to answer those questions and check out the early spec of :has selector and see how it should improve the styling workflow once it’s released.

Let’s cross our fingers. I’ve been watching this for 10 years and trying to document use cases.

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Can I :has()

Chris Coyier — Fri, 04 Jun 2021 14:37:59 +0000

I just joked that we’re basically getting everything we want in CSS super fast (mostly referring to container queries, my gosh, can you imagine they are actually coming?). Now we might actually get parent selectors?! As in .parent:has(.child) { }. Traditionally it’s been nope, too slow, browsers can’t do it. Brian Kardell:

Igalia engineers have been looking into this problem. We’ve been having discussions with Chromium developers, looking into Firefox and WebKit codebases and doing some initial protypes and tests to really get our heads around it. Through this, we’ve provided lots of data about performance of what we have already and where we believe challenges and possibilities lie. We’ve begun sketching out an explainer with all of our design notes and questions linked up

Like I said in 2010: Want!

Here’s some other use cases in the blog post and comment section.

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The CSS :has Selector (and 4+ Examples)

Robin Rendle — Wed, 17 Mar 2021 18:40:16 +0000

The CSS :has selector helps you select elements that contain elements that match the selector you pass into the :has() function. It’s essentially a “parent” selector, although far more useful than just that. For example, imagine being able to select all

s but only when they contain a

. That’s what we can do:

div:has(p) {
  background: red;
}
/*
   
     
  

  
 
   
    
  
*/

Although it’s not supported in any browser as I write, it has now dropped in Safari Technical Preview 137, so it’s starting to happen!

Pretty darn handy right! Here’s another example. Say you want space after your headers. Of course! A bit of margin-block-end on your h2 should do it. But… what if there is a subtitle? Now we can select a parent on the condition a subtitle is present and adjust the spacing.

h2,
.subtitle {
  margin: 0 0 1.5rem 0;
}
.header-group:has(h2):has(.subtitle) h2 {
  margin: 0 0 0.2rem 0; /* reduce spacing on header, because subtitle will handle it */
}

/*
  
    Blog Post Title
 
  

  
    Blog Post Title
     
      This is a subtitle
    
  
*/

On the left, the main spacing happens after the h2, on the right, the main spacing happens after the subtitle.

The way I think about :has is this: it’s a parent selector pseudo-class. That is CSS-speak for “it lets you change the parent element if it has a child or another element that follows it.” This might feel weird! It might break your mental model of how CSS works. This is how I’m used to thinking about CSS:

.parent .child {
  color: red;
}

You can only style down, from parent to child, but never back up the tree. :has completely changes this because up until now there have been no parent selectors in CSS and there are some good reasons why. Because of the way in which browsers parse HTML and CSS, selecting the parent if certain conditions are met could lead to all sorts of performance concerns.

If I sit down and think about all the ways I might use :has today, I sort of get a headache. It would open up this pandora’s box of opportunities that have never been possible with CSS alone.

Another example: let’s say we want to only apply styles to links that have images in them:

a:has(> img) {
  border: 20px solid white;
}

This would be helpful from time to time. I can also see :has being used for conditionally adding margin and padding to elements depending on their content. That would be neat.

The :has selector is part of the CSS Selectors Level 4 specification which is the same spec that has the extremely useful :not pseudo-class.

You could argue that the CSS :has selector is more powerful than just a “parent” selector, which is exactly what Bramus has done! Like in the subheadings example above, you aren’t necessarily ultimately selecting the parent, you might select the parent in a has-condition, but then ultimately select a child element from there.

/*  Matches  elements that have a  as a child element */
figure:has(figcaption) { … }

/* Matches  elements that is a child of a  that contains a  child element */
figure:has(figcaption) img { … }

There you can quickly see that the second selector is selecting a child , not just the parent of the

Selector List

You can chain it:

article:has(h2):has(ul) {

}

Or give it a selector list:

article:has(h2, ul) {

}

~~And the list is forgiving:~~ The list is no longer “forgiving” after the W3C adopted a resolution in December 2020 in response to a reported issue. So, if the selector list contains even one invalid argument, the entire list is ignored:

/* 👎 */
article:has(h2, ul, ::-blahdeath) {
  /* ::blahdeath is invalid, making the entire selector invalid. */
}

A workaround is to nest a more forgiving selector in there, such as :is() or :where():

/* 👍 */
article:has(:where(h2, ul, ::-blahdeath)) {
  /* :where is a forgiving selector, making this valid. */
}

Testing for Support

@supports(selector(:has(p))) {
  /* Supported! */
}

The `:not()` selector is part of the same spec…

Unlike :has, :not does have pretty decent browser support and I used it for the first time the other day:

ul li:not(:first-of-type) {
  color: red;
}

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That’s great I also love how gosh darn readable it is; you don’t ever have to have seen this line of code to understand what it does.

Another way you can use :not is for margins:

ul li:not(:last-of-type) {
  margin-bottom: 20px;
}

So every element that is not the last item gets a margin. This is useful if you have a bunch of elements in a card, like this:

CodePen Embed Fallback

… and also `:is()` and `:where()`

CSS Selectors Level 4 is also the same spec that has the :is selector that can be used like this today in a lot of browsers:

:is(section, article, aside, nav) :is(h1, h2, h3, h4, h5, h6) {
  color: #BADA55;
}

/* ... which would be the equivalent of: */
section h1, section h2, section h3, section h4, section h5, section h6, 
article h1, article h2, article h3, article h4, article h5, article h6, 
aside h1, aside h2, aside h3, aside h4, aside h5, aside h6, 
nav h1, nav h2, nav h3, nav h4, nav h5, nav h6 {
  color: #BADA55;
}

More Info

So that’s it! :has should be quite useful to use soon, and its cousins :is and :not can be fabulously helpful already and that’s only a tiny glimpse — just three CSS pseudo-classes — that are available in this new spec.

Adrian Bece — Meet :has, A Native CSS Parent Selector (And More)
Bramus Van Damme — The CSS :has() selector is way more than a “Parent Selector”
Michelle Barker — :has() Has Landed in Safari

The CSS :has Selector (and 4+ Examples) originally published on CSS-Tricks, which is part of the DigitalOcean family. You should get the newsletter.

:has – CSS-Tricks

Taming the Cascade With BEM and Modern CSS Selectors

What’s this about modern CSS selectors?

Dang. So now what?

:where() allows us to nest

What about non-BEM HTML?

That’s it!

Creating Animated, Clickable Cards With the :has() Relational Pseudo Class

What is this :has() pseudo class?

How we currently handle clickable cards

The “Link as a Wrapper” approach

The JavaScript method

The ::after selector approach

A new approach: Using ::after with :has()

Some Heading

Implicit Grids, Repeatable Layout Patterns, and Danglers

Meet `:has`, A Native CSS Parent Selector

Can I :has()

The CSS :has Selector (and 4+ Examples)

Blog Post Title

Blog Post Title

Selector List

Testing for Support

The :not() selector is part of the same spec…

… and also :is() and :where()

More Info

`:where()` allows us to nest

What is this `:has()` pseudo class?

The `::after` selector approach

A new approach: Using `::after` with `:has()`

The `:not()` selector is part of the same spec…

… and also `:is()` and `:where()`