When should you include vendor prefixes and which properties commonly require them?

When should you include vendor prefixes and which properties commonly require them?

• A. For modern browsers; fonts and shadows
• B. For older browsers; transforms, transitions, gradients; Autoprefixer.
• C. Always add prefixes manually for all properties
• D. They are deprecated and unnecessary

Answer: (D)

Vendor prefixes exist to let browsers experiment with new CSS features and ensure older or non-standard implementations work alongside the standard one. The practical takeaway is that you prefix mainly to support older browsers, and only for features that historically needed prefixes. In practice, transforms, transitions, and gradients are the kinds of properties that often required prefixes in earlier years. Today, with modern browsers, those properties usually work without prefixes, but if you need to support older browser versions, you’d rely on a tool like Autoprefixer to add the necessary prefixes automatically based on your target browsers. That way you don’t manually prefix every property, and you keep compatibility without extra work. The statement that prefixes are deprecated and unnecessary isn’t accurate. They aren’t deprecated, but their use is mostly limited to legacy support; modern workflows typically rely on tooling to insert prefixes only when a target browser list requires them.

Vendor prefixes exist to let browsers experiment with new CSS features and ensure older or non-standard implementations work alongside the standard one. The practical takeaway is that you prefix mainly to support older browsers, and only for features that historically needed prefixes.

In practice, transforms, transitions, and gradients are the kinds of properties that often required prefixes in earlier years. Today, with modern browsers, those properties usually work without prefixes, but if you need to support older browser versions, you’d rely on a tool like Autoprefixer to add the necessary prefixes automatically based on your target browsers. That way you don’t manually prefix every property, and you keep compatibility without extra work.

The statement that prefixes are deprecated and unnecessary isn’t accurate. They aren’t deprecated, but their use is mostly limited to legacy support; modern workflows typically rely on tooling to insert prefixes only when a target browser list requires them.