To add a preprocessor to your Pen, click the settings “gear” icon at the top of the CSS editor panel . The Pen Settings will open with the CSS tab automatically selected. You can also open Pen Settings from the button in the header.
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The gist of it is open source. Anyone can use the code you put on CodePen for whatever they wish – but if they do – that code also must have this same license . This is to encourage open sharing of code. Remember that any code you post on CodePen should be compatible with this license or it is subject to removal.
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