433: CodePen 2.0 is Backward Compatible with Any Classic Pen or Project

433: CodePen 2.0 is Backward Compatible with Any Classic Pen or Project

July 7, 2026

About this episode

The episode discusses the backward compatibility of CodePen 2.0 with existing Pens and Projects, highlighting the engineering challenges faced during its development.

When we set out to build the 2.0 editor, another editor in the CodePen cannon, the goal was actually to reduce the number of editors we have and support. Ideally, reduce it to one. The trick is that anything an existing Pen or Project can do, this new editor needs to be able to do as well. All while making sure it's forever future extensible. That was the wild engineering task in front of us, and we're happy to report it's done. To be clear, at the time of publishing: all Projects have been converted to 2.0 Pens, so Projects doesn't even exist anymore. Someday we'll convert Pens too, but not particularly soon. Instead, you can choose to convert Classic Pens (with a button click under the Save menu) if you want to. Sponsor: Notion With the recent launch of Custom Agents, Notion became the collaborative AI workspace where teams and agents work side by side. And now, their new Developer Platform is turning that workspace into infrastructure developers can build on. Time Jumps

Sponsors

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