New way to highlight text in the browser with CSS Highlights API
Learn how the CSS Custom Highlight API works and why it can make text highlighting faster, cleaner, and easier to maintain in modern web apps.
This short frontend development explainer shows how to highlight text ranges without wrapping content in extra DOM elements. We look at how the Custom Highlight API uses the JavaScript Range API, why it can be better than adding spans, and where it helps in real interfaces like code editors, markdown previews, search results, comments, annotations, form validation, docs, and debugging tools.
You will learn:
What the CSS Custom Highlight API is
How custom highlights work with JavaScript ranges
Why highlighting text without changing the DOM improves UI performance
How this browser API helps with code highlighting, inline notes, Find on Page, and error hints
When frontend developers should consider using it
More short explainers about CSS, JavaScript, browser APIs, frontend performance, and modern web development are coming soon.
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