排版引擎（layout engine），俗称浏览器内核，是还显（render）网页个计算机程序。
常见引擎
- Trident：顶早用于Internet Explorer
- EdgeHTML：顶早用于Microsoft Edge
- Tasman：顶早用于Internet Explorer for Mac
- KHTML：顶早用于Konqueror
- WebKit：顶早用于Safari
- Blink：顶早用于Chromium
- WebKit：顶早用于Safari
- Gecko：顶早用于网景
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