Support tables for HTML5, CSS3, etc

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Discover new discover fonts and colors

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Javascript入门文档

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阮一峰：开源的 JavaScript 语言教程

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胡子大哈

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MDN Tutorial

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You may not need jQuery

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Jeff Atwood!!!

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Mobile Speed By Google

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Online Front End Playground

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JavaScript Fiddle with boilerplate

Powerful online code editor