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Generate a sourcemap #109

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bartveneman opened this issue Dec 21, 2024 · 0 comments

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bartveneman commented Dec 21, 2024 •

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I have a use case for tracking old and new string indexes of the before + after CSS.

This could also be done via a callback, like this, but sourcemaps are more elegant, I guess?

let positions = new Map<[number, number], [number,number]>
let new_css = fomat(old_css, { 
  on_node: function (node: csstree.CssNode, start_pos: number, end_pos: number }) {
    positions.set([node.loc.start.offset, node.loc.end.offset], [start_pos, end_pos])
  })
})

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