Attribute Contains Substring

Attribute

[attr*="value"]

Selects elements where the attribute value contains the specified substring anywhere.

Example

a[href*="youtube"] {
  color: red;
}
img[src*="avatar"] {
  border-radius: 50%;
}

Specificity

0-1-0

Browser Support

All browsers

About the Attribute Contains Substring

The [attr*="value"] CSS selector belongs to the Attribute category.Selects elements where the attribute value contains the specified substring anywhere. 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 Attribute Contains Substring 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

[attr^="value"][attr$="value"][attr="value"]