They now:
- Have an all-new design that allows for a split-view (code on the left, preview on the right) when the responsive design allows.
- Can be editable.
Along with all the same great features they have always had like themes (total design control! change all your embeds at once!) and optional click-to-play (for increased performance).
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CodePen Embedded Pen Upgrades is a post from CSS-Tricks
