Class selector
A class selector is a CSS selector that matches elements whose class attribute contains a specified class name.
CSS in Depth, Second Edition
A CSS class selector matches elements whose class attribute contains a specified class name.
- How it is used
- Styles marked elements and demonstrates how class-based rules participate in resolving conflicting CSS declarations.
- How deep it goes
- Explains selector specificity with contrasting listings and fixes, but stops short of broader stylesheet-origin rules.
- Examples
- Uses featured links, navigation selectors, specificity listings, and alternative fixes involving !important and targeted selectors.
- What you can do after
- Apply it via CSS by diagnosing why a class rule loses and choosing a more targeted selector when appropriate.
Read how CSS in Depth, Second Edition explains class selector →
Tiny CSS Projects
A class selector is a CSS selector that matches elements having a specified class value.
- How it is used
- Applies shared CSS declarations to multiple HTML elements grouped by a class value.
- How deep it goes
- Explains class attributes, naming, reuse, specificity, and a shared-versus-specific card layout, stopping short of selector internals.
- Examples
- Uses small-heading elements and the front-and-back sides of a virtual credit card as concrete class-selector examples.
- What you can do after
- Apply shared and side-specific CSS styles while choosing maintainable class names and anticipating specificity conflicts.
Related concepts
- CSS selectorkind of · A CSS selector is a pattern that identifies document elements by their names, attributes, relationships, states, or other conditions.
- ID selectorcontrasts with · An ID selector is a CSS selector that matches an element by the value of its id attribute.
- CSS classuses · A name assigned to one or more document elements through a class attribute, allowing CSS selectors to match them and apply shared style declarations.
- pseudo-classequivalent to · A CSS pseudo-class is a selector construct that matches elements according to a state, condition, or structural relationship.
- specificitymeasures · CSS specificity is the priority assigned to a selector that helps determine which matching declaration takes precedence in the cascade when styles conflict.
- descendant selectorcontrasts with · A descendant selector is a CSS selector relationship that matches elements nested at any depth within an element matched by another selector.
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