The container-name CSS property specifies a list of query container names used by the @container at-rule in a container query. A container query will apply styles to elements based on the size or scroll-state of the nearest ancestor with a containment context. When a containment context is given a name, it can be specifically targeted using the @container at-rule instead of the nearest ancestor with containment.

Syntax

container-name: none;

/* A single name */
container-name: my-layout;

/* Multiple names */
container-name: my-page-layout my-component-library;

/* Global Values */
container-name: inherit;
container-name: initial;
container-name: revert;
container-name: revert-layer;
container-name: unset;

Values

none

Default value. The query container has no name.

<custom-ident>

A case-sensitive string that is used to identify the container. The following conditions apply:

• The name must not equal or, and, not, or default.
• The name value must not be in quotes.
• The dashed ident intended to denote author-defined identifiers (e.g., --container-name) is permitted.
• A list of multiple names separated by a space is allowed.

Formal definition

Formal syntax

container-name = 
  none             |
  <custom-ident>+  

Examples

Using a container name

Given the following HTML example which is a card component with a title and some text:

<div class="card">
  <div class="post-meta">
    <h2>Card title</h2>
    <p>My post details.</p>
  </div>
  <div class="post-excerpt">
    <p>
      A preview of my <a href="https://example.com">blog post</a> about cats.
    </p>
  </div>
</div>

To create a containment context, add the container-type property to an element in CSS. The following example creates two containment contexts, one for the card meta information and one for the post excerpt:

.post-meta {
  container-type: inline-size;
}

.post-excerpt {
  container-type: inline-size;
  container-name: excerpt;
}

Writing a container query via the @container at-rule will apply styles to the elements of the container when the query evaluates to true. The following example has two container queries, one that will apply only to the contents of the .post-excerpt element and one that will apply to both the .post-meta and .post-excerpt contents:

@container excerpt (width >= 400px) {
  p {
    visibility: hidden;
  }
}

@container (width >= 400px) {
  p {
    font-size: 2rem;
  }
}

For more information on writing container queries, see the CSS Container Queries page.

Using multiple container names

You can also provide multiple names to a container context separated by a space:

.post-meta {
  container-type: inline-size;
  container-name: meta card;
}

This will allow you to target the container using either name in the @container at-rule. This is useful if you want to target the same container with multiple container queries where either condition could be true:

@container meta (width <= 500px) {
  p {
    visibility: hidden;
  }
}

@container card (width <= 200px) {
  h2 {
    font-size: 1.5em;
  }
}

Specifications

Browser compatibility

See also

• CSS container queries
• Using container size and style queries
• Using container scroll-state queries
• @container at-rule
• CSS container shorthand property
• CSS container-type property
• CSS content-visibility property