The required pseudo-class

The required pseudo-class specifies the style of the input that has the required attribute, i.e. this pseudo-class applies to required inputs.

Syntax

cssselector:required {}

Example

Let's give the required input a blue background:

html<form>
  <p>
    <label>Enter number</label>
    <input type="number" required>
  </p>
  <p>
    <label>Enter text</label>
    <input type="text">
  </p>
</form>

cssinput:required {
  background-color: #C2DDFD;
}

Результат:

See also