Where

Pseudo-class

:where(selector)

Like :is() but with zero specificity. Ideal for reset stylesheets and defaults.

Example

:where(h1, h2, h3) {
  margin-top: 0;
}
:where(.card, .panel) > p {
  color: inherit;
}

Specificity

0-0-0

Browser Support

All modern browsers

About the Where

The :where(selector) CSS selector belongs to the Pseudo-class category.Like :is() but with zero specificity. Ideal for reset stylesheets and defaults. Understanding CSS selector specificity and combinators is essential for writing maintainable stylesheets that behave predictably.

The specificity of this selector is 0-0-0. 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 Where is: All modern 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

:is(selector):not(selector):has(selector)