Unique Selector Customization

Question

Unique Selector Customization

Is there a way to style all custom elements in CSS? I am looking to make custom elements default to block display (as most browsers render them inline by default) and then adjust as needed.

A potential rule I have in mind is:

*::custom {
    display: block;
}

Since all custom elements contain dashes in the name convention, I could create a rule based on that. However, this approach may be slower on current browsers due to regular expressions. It would be more efficient if there were a built-in selector for this purpose.

html css css-selectors custom-element

Answer 1

Answer №1

Unfortunately, there is no pseudo selector available for that.

An alternative solution, albeit not the most efficient one, would be to implement CSS like this:

:not(html, head, body, h1, h2, h3, h4, h5, h6, div, ...) {
  /* Your code here */
}

This method will get the job done, but it does come with a downside - you'll need to manually add any new elements if they are added in the future. It's a bit of a hassle!

^.^

Answer 2

Unfortunately, there is no pseudo selector available for that.

An alternative solution, albeit not the most efficient one, would be to implement CSS like this:

:not(html, head, body, h1, h2, h3, h4, h5, h6, div, ...) {
  /* Your code here */
}

This method will get the job done, but it does come with a downside - you'll need to manually add any new elements if they are added in the future. It's a bit of a hassle!

^.^

Answer 3

Answer №2

Enhance your custom elements with a unique attribute:

<some-element special-elem /> <other-element special-elem />
<script> 
  var specials = document.querySelectorAll( "*[special-elem]" )
</script>
<style>
    *[special-elem] { display: flex ; }
</style>

Answer 4

Enhance your custom elements with a unique attribute:

<some-element special-elem /> <other-element special-elem />
<script> 
  var specials = document.querySelectorAll( "*[special-elem]" )
</script>
<style>
    *[special-elem] { display: flex ; }
</style>

Answer 5

Answer №3

Here is a solution inspired by Florrie's response:

:not(html):not(head):not(title):not(base):not(link):not(meta):not(style):not(body):not(article):not(section):not(nav):not(aside):not(h1):not(h2):not(h3):not(h4):not(h5):not(h6):not(hgroup):not(header):not(footer):not(address):not(p):not(hr):not(pre):not(blockquote):not(ol):not(ul):not(li):not(dl):not(dt):not(dd):not(figure):not(figcaption):not(div):not(main):not(a):not(em):not(strong):not(small):not(s):not(cite):not(q):not(dfn):not(abbr):not(data):not(time):not(code):not(var):not(samp):not(kbd):not(sub):not(sup):not(i):not(b):not(u):not(mark):not(ruby):not(rb):not(rt):not(rtc):not(rp):not(bdi):not(bdo):not(span):not(br):not(wbr):not(ins):not(del):not(picture):not(img):not(iframe):not(embed):not(object):not(param):not(video):not(audio):not(source):not(track):not(map):not(area):not(math):not(svg):not(table):not(caption):not(colgroup):not(col):not(tbody):not(thead):not(tfoot):not(tr):not(td):not(th):not(form):not(label):not(input):not(button):not(select):not(datalist):not(optgroup):not(option):not(textarea):not(keygen):not(output):not(progress):not(meter):not(fieldset):not(legend):not(script):not(noscript):not(template):not(canvas

Furthermore, it will be necessary to take into consideration SVG and MathML namespaces.

One approach could involve including their tags in a similar fashion.
In specific scenarios (e.g., ad-blocking), it may suffice to include a few potential parent elements before the selector to prevent <svg> and <math> children. For instance,
```
:-webkit-any(body, div) > :not(...
```
. Refer to :is(), :matches(), :any().
Once implemented, Selectors Level 4 should permit something like :not(math *, svg *).

@namespace can also be utilized, such as

@namespace xhtml "http://www.w3.org/1999/xhtml"; xhtml|*:not(...

.

Answer 6

Here is a solution inspired by Florrie's response:

:not(html):not(head):not(title):not(base):not(link):not(meta):not(style):not(body):not(article):not(section):not(nav):not(aside):not(h1):not(h2):not(h3):not(h4):not(h5):not(h6):not(hgroup):not(header):not(footer):not(address):not(p):not(hr):not(pre):not(blockquote):not(ol):not(ul):not(li):not(dl):not(dt):not(dd):not(figure):not(figcaption):not(div):not(main):not(a):not(em):not(strong):not(small):not(s):not(cite):not(q):not(dfn):not(abbr):not(data):not(time):not(code):not(var):not(samp):not(kbd):not(sub):not(sup):not(i):not(b):not(u):not(mark):not(ruby):not(rb):not(rt):not(rtc):not(rp):not(bdi):not(bdo):not(span):not(br):not(wbr):not(ins):not(del):not(picture):not(img):not(iframe):not(embed):not(object):not(param):not(video):not(audio):not(source):not(track):not(map):not(area):not(math):not(svg):not(table):not(caption):not(colgroup):not(col):not(tbody):not(thead):not(tfoot):not(tr):not(td):not(th):not(form):not(label):not(input):not(button):not(select):not(datalist):not(optgroup):not(option):not(textarea):not(keygen):not(output):not(progress):not(meter):not(fieldset):not(legend):not(script):not(noscript):not(template):not(canvas

Furthermore, it will be necessary to take into consideration SVG and MathML namespaces.

One approach could involve including their tags in a similar fashion.
In specific scenarios (e.g., ad-blocking), it may suffice to include a few potential parent elements before the selector to prevent <svg> and <math> children. For instance,
```
:-webkit-any(body, div) > :not(...
```
. Refer to :is(), :matches(), :any().
Once implemented, Selectors Level 4 should permit something like :not(math *, svg *).

@namespace can also be utilized, such as

@namespace xhtml "http://www.w3.org/1999/xhtml"; xhtml|*:not(...

.

Answer 7

Answer №4

If you're looking to style all custom elements on a page, you can achieve this by tweaking code inspired by this Stack Overflow answer that retrieves all registered custom tag names:

function findCustomElements() {
    const allElements = document.getElementsByTagName("*");
    let elementTags = [].map.call(allElements, el => el.nodeName.toLowerCase())
    elementTags = [...new Set(elementTags)];
    return elementTags.filter(tag => customElements.get(tag));
}

Once you have the list of custom elements, you can then apply styling to each one like so:

const customElementSelector = findCustomElements().join();
document.querySelectorAll(customElementSelector).forEach(el => {
    el.style.border = "solid";
});

Answer 8

If you're looking to style all custom elements on a page, you can achieve this by tweaking code inspired by this Stack Overflow answer that retrieves all registered custom tag names:

function findCustomElements() {
    const allElements = document.getElementsByTagName("*");
    let elementTags = [].map.call(allElements, el => el.nodeName.toLowerCase())
    elementTags = [...new Set(elementTags)];
    return elementTags.filter(tag => customElements.get(tag));
}

Once you have the list of custom elements, you can then apply styling to each one like so:

const customElementSelector = findCustomElements().join();
document.querySelectorAll(customElementSelector).forEach(el => {
    el.style.border = "solid";
});

Answer 9

Answer №5

Opting for custom tags over using div:

:where(:not(:defined)) { 
    display: block; 
}

The selector :not(:defined) targets elements that are not native or defined with customElements.define().

By applying :where, we maintain low specificity to prevent disrupting grid, flow, and display:inline.

This adjustment does not alter the default inline display of custom elements registered via customElements.define(). Overall, it shouldn't be burdensome given that specific code is typically written for these elements.

Answer 10

Opting for custom tags over using div:

:where(:not(:defined)) { 
    display: block; 
}

The selector :not(:defined) targets elements that are not native or defined with customElements.define().

By applying :where, we maintain low specificity to prevent disrupting grid, flow, and display:inline.

This adjustment does not alter the default inline display of custom elements registered via customElements.define(). Overall, it shouldn't be burdensome given that specific code is typically written for these elements.

Answer 11

Answer №6

This code snippet utilizes JavaScript to generate an array containing custom HTML elements.

Array.from(document.querySelectorAll('*')).filter(el => el.tagName.includes('-'))

Answer 12

This code snippet utilizes JavaScript to generate an array containing custom HTML elements.

Array.from(document.querySelectorAll('*')).filter(el => el.tagName.includes('-'))

Answer 13

Answer №7

To achieve the desired styling, you can utilize CSS in the following way:

custom-element{
    background-color: blue;
    padding: 10px;
}

After conducting tests in both Firefox and Chrome, I can confirm that this code works properly. However, it is recommended to test it on various environments for full compatibility.

Answer 14

To achieve the desired styling, you can utilize CSS in the following way:

custom-element{
    background-color: blue;
    padding: 10px;
}

After conducting tests in both Firefox and Chrome, I can confirm that this code works properly. However, it is recommended to test it on various environments for full compatibility.

Unique Selector Customization

Answer №1

Answer №2

Answer №3

Answer №4

Answer №5

Answer №6

Answer №7

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