Some new features CSS in 4

In this article we will explore some new CSS features in 2024.

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1. CSS container queries

Container queries allow you to apply a style to an item depending on the size of the item's container.Container queries work like media queries.

Using container queries

Using container queries, you can dynamically adjust the style of child elements within a parent element according to their size.

To do this, you must first define a container context for the parent element. You specify this with the container-type property.

• container-type: size; When set to , you can query by both width and height values.

• container-type: inline-size; When set to , query is made only on width (horizontal dimension).

Thanks to this feature, the style properties of child elements can be changed depending on the size of the parent element.

Examples :

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

.post {
    container-type: size;
  }

  .card h2 {
    font-size: 1em;
    color: blue;
  }

  @container (min-width: 700px) {
    .card h2 {
      font-size: 5em;
      color: purple;
    }
  }

Output :

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2. Css Nesting

With CSS nesting, you can place one rule inside another. This is especially useful for managing styles that are context-dependent. For example, if you have a .container class and want to style its .item elements, you can write the .item rules directly inside the .container rule. CSS Nesting is parsed directly by the browser. This means you don’t need a preprocessor to compile nested rules; they work natively in the browser.

Examples :

Name: Surname:

 input {

    border: red 2px solid;
  }
  label {
    font-family: system-ui;
    font-size: 1.25rem;
    & input {

      border: purple 2px solid;
    }
  }

Output :

---

3. :scope Pseudo Class

The Scope Selector is used to define the scope for styles in CSS.

Usage :

• If :scope is at the root level of a css, it is equivalent to :root

Examples :

:scope {
  background-color: orange;
}

Output :

---

• Using :scope within @scope blocks allows for clear and targeted styling based on the context defined by the class names.

Examples :

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

.post {
    container-type: size;
  }

  .card h2 {
    font-size: 1em;
    color: blue;
  }

  @container (min-width: 700px) {
    .card h2 {
      font-size: 5em;
      color: purple;
    }
  }

Output :

---

4. :has() Pseudo Class

The :has() selector in CSS allows you to style a parent element if it contains a specific child element.

Examples :

Name: Surname:

 input {

    border: red 2px solid;
  }
  label {
    font-family: system-ui;
    font-size: 1.25rem;
    & input {

      border: purple 2px solid;
    }
  }

Output :

---

5. Color Functions

You can have much more control over the tones and contrasts of colors with new color functions such as color-mix() and color-contrast()

Examples :

---

6. Anchor Positioning

The CSS anchor positioning module defines features that allow you to tether elements together. Certain elements are defined as anchor elements; anchor-positioned elements can then have their size and position set based on the size and location of the anchor elements to which they are bound.

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Conclusion

In this article, we explored some new features CSS in 2024. You can use this features for app.

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