2017年4月13日 — To know what prefixes to use is based on what browsers you want to support. A good place to find out what browser versions require a prefix is caniuse.com.
2024年8月13日 — User agents based on WebKit or Blink, such as Safari and Chrome, support several special extensions to CSS. These extensions are prefixed with -webkit-.
2013年8月6日 — Typically they're used to implement new, or proprietary CSS features, prior to final clarification/definition by the W3. This allows properties ...