@smashercosmo sorry, I missed this issue.

This code works without any problem:

let autoprefixer = require('.')
let postcss = require('postcss')

let css = `
@supports (grid-template-columns: 1fr) {
  .columns {
    grid-template-columns: 1fr;
  }
}`

console.log(postcss([autoprefixer({ grid: 'autoplace' })]).process(css).css)

Maybe the bug was fixed? Can you check it again? If the issue is still actual, can you give me full stack trace?

If you paste this code into https://autoprefixer.github.io/ you'll get this error (but it's possible that this service uses the old version of autoprefxer)

Yes, it uses [email protected]

I got the correct output in the online tool too. What browsers do you have there?

You will see this error if you set last 4 version in the filter field

Fixed cc827ab

👍👍👍 thx

Released in 9.7