Class Selector

Basic

.classname

Selects all elements with the specified class attribute. The most commonly used selector for styling.

Example

.btn {
  padding: 8px 16px;
  border-radius: 4px;
}
.btn-primary {
  background: blue;
  color: white;
}

Specificity

0-1-0

Browser Support

All browsers

About the Class Selector

The .classname CSS selector belongs to the Basic category.Selects all elements with the specified class attribute. The most commonly used selector for styling. 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 Class Selector 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

#idname element *