A CSS class is a reusable label on an element. During virtual DOM reconciliation, its class names are compared separately from ordinary attributes, styles, and event handlers. section 8.2.5
CSS class
A CSS class is a reusable label assigned to elements so stylesheet rules can select and style them.
How Build a Frontend Web Framework (From Scratch) covers it
- How deep it goes
- Explains conversion, diffing, addition, and removal, while deferring the complete class-value conversion implementation.
- Examples
- Uses patchClasses(), arraysDiff(), classList.add(), classList.remove(), and blank-string filtering as implementation examples.
- What you can do after
- Build it from scratch as an incremental class-list patcher for a virtual DOM renderer.
- How it connects
- Connects CSS classes with virtual DOM nodes, DOM attributes, inline styles, event handlers, and reconciliation.
Also explained in
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WordPress Power Toolkit: Harness AI to build next-level websitesA CSS class is a reusable identifier assigned to HTML elements so that shared CSS style declarations can be applied to them.
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Web Components in ActionA CSS class is a named classification applied to elements so that matching CSS rules can style them.
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React in DepthA CSS class is a named selector target that associates one or more style rules with elements carrying that class name.
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Tiny CSS ProjectsA class name is an identifier assigned to an HTML element's class attribute for grouping elements and targeting them with CSS.
Compare how 5 books explain CSS class →
Related concepts
- BEMconfigured by · BEM, or Block-Element-Modifier, is a CSS naming methodology that organizes classes around reusable blocks, their elements, and their modifiers.
- CSShakeused by · CSShake is a CSS library that provides animation classes for making elements appear to shake.
- style attributealternative to · The style attribute is an HTML or SVG attribute whose value contains CSS declarations applied directly to that element.
This explainer was generated by Manning's knowledge graph from the text of Build a Frontend Web Framework (From Scratch). The section links point to the parts of the book it draws on.