So what's CodePen 2.0? Why is it better? Chris Coyier tells you all about it.

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CodePen co-founder Chris Coyier announces CodePen 2.0, now in public beta. The redesigned platform unifies multiple editors into one flexible system that retains the classic three-box layout while adding support for multiple files, various preprocessors like Svelte, and an extensible architecture designed to accommodate future processors and tools. The rebuild prioritized backwards compatibility with all existing pens while future-proofing the platform.