This property is a shorthand for the following CSS properties:

• container-name
• container-type

<container-name>

A case-sensitive name for the containment context. More details on the syntax are covered in the container-name property page.

<container-type>

The type of containment context. More details on the syntax are covered in the container-type property page.

container = 
  <'container-name'> [ / <'container-type'> ]?  

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

<div class="post">
  <div class="card">
    <h2>Card title</h2>
    <p>Card content</p>
  </div>
</div>

The explicit way to create a container context is to declare a container-type with an optional container-name:

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

The container shorthand is intended to make this simpler to define in a single declaration:

.post {
  container: sidebar / inline-size;
}

You can then target that container by name using the @container at-rule:

@container sidebar (min-width: 400px) {
  /* <stylesheet> */
}

• CSS container queries
• @container at-rule
• CSS contain property
• CSS container-type property
• CSS container-name property
• CSS content-visibility property