How deeply does CSS in Depth, Second Edition cover class selector?

Explains selector specificity with contrasting listings and fixes, but stops short of broader stylesheet-origin rules.

Class selector

As explained in CSS in Depth, Second Edition

A CSS class selector matches elements whose class attribute contains a specified class name.

A class selector matches elements whose class attribute contains a specified class name, such as .featured. Its declaration can still lose when another matching selector has greater specificity. section 1.1.3

When a class rule does not win, consider the specificity hierarchy:

An ID selector outranks a class selector, while a class selector outranks a tag selector. section 1.1.3

How CSS in Depth, Second Edition covers it

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Tiny CSS ProjectsA class selector is a CSS selector that matches elements having a specified class value.

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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.

This explainer was generated by Manning's knowledge graph from the text of CSS in Depth, Second Edition. The section links point to the parts of the book it draws on.