About the Stylus to SASS Converter
This is the smallest jump you can make away from Stylus. Both languages are whitespace driven, so the shape of every file stays recognisable and a code review shows only the token changes. Bare variable assignments such as brand = #f25f1e pick up a dollar sign and a colon to become $brand: #f25f1e, and every reference in a value is updated to match.
Declarations written without a colon are normalised. Stylus lets you write padding 12px, which the indented Sass parser would reject, so the converter inserts the colon while leaving the value exactly as it was. Interpolation moves from {name} to #{$name}, the form Sass resolves in selectors, property names and values.
Mixin handling uses the compact indented spellings. A Stylus definition panel(pad = 24px) becomes =panel($pad: 24px), and a bare call such as panel(20px) becomes +panel(20px), so both halves stay short. Guarded assignment with ?= maps onto the !default flag, which behaves the same way when a partial is imported after an override. What does not translate is anything drawing on the Stylus standard library or its hash literals, and those lines are copied through for you to rewrite. Compile the finished file with the SASS Compiler to see the CSS.
How to use
- Paste your Stylus source into the left pane.
- Keep the indent width the same as the original so the diff stays readable.
- Convert, then rename the file to .sass and point your build at Dart Sass.
- Compile once to catch any line that was copied through untranslated.
Common questions
- Does the colon get added automatically?
- Yes. Stylus makes the colon optional but indented Sass requires it, so every declaration is written out in the punctuated form.
- How is ?= translated?
- It becomes the !default flag on the assignment, which tells Sass to skip the assignment when the variable already holds a value.
- Can I keep using my existing folder structure?
- Yes. Rename each file and prefix partials with an underscore so Sass does not compile them on their own, then update the import lines.
- Is Sass a safer long term choice than Stylus?
- Dart Sass ships regular releases and is the default in most bundlers, while Stylus updates are sporadic, so most teams treat the move as reducing risk.