Focus

Pseudo-class

:focus

Applies styles when an element receives focus, typically via keyboard navigation or click.

Example

input:focus {
  outline: 2px solid blue;
  border-color: blue;
}
button:focus {
  ring: 2px solid blue;
}

Specificity

0-1-0

Browser Support

All browsers

About the Focus

The :focus CSS selector belongs to the Pseudo-class category.Applies styles when an element receives focus, typically via keyboard navigation or click. Understanding CSS selector specificity and combinators is essential for writing maintainable stylesheets that behave predictably.

The specificity of this selector is 0-1-0. CSS specificity determines which styles are applied when multiple rules target the same element. Higher specificity values take precedence. The specificity hierarchy from lowest to highest is: universal (*) → type/element → class/attribute/pseudo-class → ID → inline styles → !important.

Browser support for Focus is: All browsers. When using newer CSS selectors like :has(), :is(), or CSS nesting, consider providing fallback styles for older browsers. Use @supports to progressively enhance your stylesheets with modern features while maintaining backward compatibility.

Related Selectors

:hover :focus-visible :focus-within