You can now use Stylus to preprocess CSS.
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Rust code now can be ran in a sandbox and CodePan gives you its standard output.
Try it here: https://codepan.net/boilerplate/rust
SASS is used by A LOT OF people, so we finally support it now!
Try it here: https://codepan.net/gist/c7106bee324ff711824ad3aeedf14a61