Myth

I thought I'd weigh in here...

1. Calling it a "postprocessor" is weird. It gets parsed into CSS before the browser sees it, so it's a preprocessor. If something parses the CSS out from the browser, it can be a postprocessor, ala -prefix-free.
2. I really love the idea of authoring as if vendor prefixes never existed and letting software fix it up for you. This is what Autoprefixer does. It might just use that internally?
3. The whole point of calc()
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Myth is a post from CSS-Tricks