🏠 New in Low Baseline Support: Custom highlights

March 24, 2026

caniuse · mdn · spec

Custom highlights style arbitrary text ranges, without adding extra elements to the DOM.

Source features

• api.CSS.highlights_static [mdn]
• api.Highlight [mdn]
• api.Highlight.@@iterator [mdn]
• api.Highlight.Highlight [mdn]
• api.Highlight.add [mdn]
• api.Highlight.clear [mdn]
• api.Highlight.delete [mdn]
• api.Highlight.entries [mdn]
• api.Highlight.forEach [mdn]
• api.Highlight.has [mdn]
• api.Highlight.keys [mdn]
• api.Highlight.priority [mdn]
• api.Highlight.size [mdn]
• api.Highlight.type [mdn]
• api.Highlight.values [mdn]
• api.HighlightRegistry [mdn]
• api.HighlightRegistry.@@iterator [mdn]
• api.HighlightRegistry.clear [mdn]
• api.HighlightRegistry.delete [mdn]
• api.HighlightRegistry.entries [mdn]
• api.HighlightRegistry.forEach [mdn]
• api.HighlightRegistry.get [mdn]
• api.HighlightRegistry.has [mdn]
• api.HighlightRegistry.keys [mdn]
• api.HighlightRegistry.set [mdn]
• api.HighlightRegistry.size [mdn]
• api.HighlightRegistry.values [mdn]
• css.selectors.highlight [mdn]