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extract: Add a performant indexOf escape #2

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extract: Add a performant indexOf escape #2

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3 changes: 3 additions & 0 deletions index.js
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Original file line number Diff line number Diff line change
Expand Up @@ -44,6 +44,9 @@ function cssExtract (bundle, opts) {
// extract css from chunks
// obj -> str
function extract (chunk) {
// Do a performant check before building the ast
if (String(chunk.source).indexOf('insert-css') === -1) return ''

const css = []
const ast = falafel(chunk.source, { ecmaVersion: 6 }, walk)
chunk.source = ast.toString()
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