I'd like to target all h tags on a page. I know you can do it this way...

h1,
h2,
h3,
h4,
h5,
h6 {
  font: 32px/42px trajan-pro-1,trajan-pro-2;
}

but is there a more efficient way of doing this using ad开发者_运维问答vanced CSS selectors? e.g something like:

[att^=h] {
  font: 32px/42px trajan-pro-1,trajan-pro-2;
}

(but obviously this doesn't work)

No, a comma-separated list is what you want in this case.

If you're using SASS you could also use this mixin:

@mixin headings {
    h1, h2, h3,
    h4, h5, h6 {
        @content;
    }
}

Use it like so:

@include headings {
    font: 32px/42px trajan-pro-1, trajan-pro-2;
}

Edit: My personal favourite way of doing this by optionally extending a placeholder selector on each of the heading elements.

h1, h2, h3,
h4, h5, h6 {
    @extend %headings !optional;
}

Then I can target all headings like I would target any single class, for example:

.element > %headings {
    color: red;
}

The new :is() CSS pseudo-class can do it in one selector.

For example, here's how you could target all headings inside a container element:

.container :is(h1, h2, h3, h4, h5, h6)
{
    color: red;
}

Most browsers now support :is(), but keep in mind that most browsers made before 2020 didn't support it without a prefix, so be careful about using this if you need to support older browsers.

In some cases, you may instead want to use the :where() pseudo-class, which is very similar to :is() but has different specificity rules.

It's not basic css, but if you're using LESS (http://lesscss.org), you can do this using recursion:

.hClass (@index) when (@index > 0) {
    h@{index} {
        font: 32px/42px trajan-pro-1,trajan-pro-2;
    }
    .hClass(@index - 1);
}
.hClass(6);

Sass (http://sass-lang.com) will allow you to manage this, but won't allow recursion; they have @for syntax for these instances:

@for $index from 1 through 6 {
  h#{$index}{
    font: 32px/42px trajan-pro-1,trajan-pro-2;
  }
}

If you're not using a dynamic language that compiles to CSS like LESS or Sass, you should definitely check out one of these options. They can really simplify and make more dynamic your CSS development.

SCSS+Compass makes this a snap, since we're talking about pre-processors.

#{headings(1,5)} {
    //definitions
  }

You can learn about all the Compass helper selectors here:

Here is my attempt to solve this problem with (modern) CSS only.

Context : Inside of Joplin (very nice note taking app, link), there is an userfile.css in which you can write your custom CSS for display and export of markdown notes.

I wanted to target all headings directly after (adjacent sibling) certain tags, namely p, ul, ol and nav to add a margin in between. Thus :

p + h1,
p + h2,
p + h3,
p + h4,
p + h5,
p + h6,
ul + h1,
ul + h2,
ul + h3,
ul + h4,
ul + h5,
ul + h6,
ol + h1,
ol + h2,
ol + h3,
ol + h4,
ol + h5,
ol + h6,
nav + h1,
nav + h2,
nav + h3,
nav + h4,
nav + h5,
nav + h6  {
  margin-top: 2em;
}

WOW. Very long. Such selectors.

I then came here, learnt, and tried :

p   + :is(h1, h2, h3, h4, h5, h6),
ul  + :is(h1, h2, h3, h4, h5, h6),
ol  + :is(h1, h2, h3, h4, h5, h6),
nav + :is(h1, h2, h3, h4, h5, h6) {
  margin-top: 2em;
}

Hmm. Much shorter. Nice.

And then, it struck me :

:is(p, ul, ol, nav) + :is(h1, h2, h3, h4, h5, h6) {
  margin-top: 2em;
}

Yay, this also works! How amazoomble!

This might also work with :where() or other CSS combinators like ~ or even (space) to create "matrix" of CSS selectors instead of very long lists.

Credits : all the answers on this page referencing the :is() selector.

Stylus's selector interpolation

for n in 1..6
  h{n}
    font: 32px/42px trajan-pro-1,trajan-pro-2;

The jQuery selector for all h tags (h1, h2 etc) is " :header ". For example, if you wanted to make all h tags red in color with jQuery, use:

$(':header').css("color","red")

July 2022 update

The future came and the :is selector is what you're looking for as described in this answer given in 2020 by @silverwind (now the selected answer).

Original answer

To tackle this with vanilla CSS look for patterns in the ancestors of the h1..h6 elements:

<section class="row">
  <header>
    <h1>AMD RX Series</h1>
    <small>These come in different brands and types</small>
  </header>
</header>

<div class="row">
  <h3>Sapphire RX460 OC 2/4GB</h3>
  <small>Available in 2GB and 4GB models</small>
</div>

If you can spot patterns you may be able to write a selector which targets what you want. Given the above example all h1..h6 elements may be targeted by combining the :first-child and :not pseudo-classes from CSS3, available in all modern browsers, like so:

.row :first-child:not(header) { /* ... */ }

In the future advanced pseudo-class selectors like :has(), and subsequent-sibling combinators (~), will provide even more control as Web standards continue to evolve over time.

Plain CSS

With plain css you have two ways. This targets all the heading elements wherever they are inside the page (as asked).

:is(h1, h2, h3, h4, h5, h6) {}

This one does the same but keeps the specificity to 0.

:where(h1, h2, h3, h4, h5, h6) {}

With PostCSS

You can also use PostCSS and the custom selectors plugin

@custom-selector :--headings h1, h2, h3, h4, h5, h6;

:--headings {
  margin-top: 0;
}

Output:

h1,
h2,
h3,
h4,
h5,
h6 {
  margin-top: 0;
}

You could .class all the headings in Your document if You would like to target them with a single selector, as follows,

<h1 class="heading">...heading text...</h1>
<h2 class="heading">...heading text...</h2>

and in the css

.heading{
    color: #Dad;
    background-color: #DadDad;
}

I am not saying this is always best practice, but it can be useful, and for targeting syntax, easier in many ways,

so if You give all h1 through h6 the same .heading class in the html, then You can modify them for any html docs that utilize that css sheet.

upside, more global control versus "section div article h1, etc{}",

downside, instead of calling all the selectors in on place in the css, You will have much more typing in the html, yet I find that having a class in the html to target all headings can be beneficial, just be careful of precedence in the css, because conflicts could arise from

Using scss you can loop through 6 and append to an empty variable $headings using a comma separator

$headings: ();

@for $index from 1 through 6 {
  $headings: list.append($headings, h#{$index}, $separator: comma);
}

#{$headings} {
  --default: var(--dark);
  color: var(--default);
}

Thanks @steve