Case-sensitive attribute selector

The s identifier in a CSS attribute selector matches attribute values case-sensitively in document languages like HTML where attribute values are case-insensitive.

Learning resources on MDN

• S, in Attribute selectors

Browser support

• Chrome ❌ See crbug.com/40667738
• Chrome Android ❌ See crbug.com/40667738
• Edge ❌ See crbug.com/40667738
• Firefox 66 Released on 2019-03-19
• Firefox for Android 66 Released on 2019-03-19
• Safari ❌ See webkit.org/b/272573
• Safari on iOS ❌ See webkit.org/b/272573

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