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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 | 10x 10x 4x 1x 3x 3x 2x 1x 3x 10x 10x 10x 6x | function hasPrefetchComment(node) {
const { leadingComments } = node
return (leadingComments || []).some(comment =>
comment.value.includes('webpackPrefetch'),
)
}
module.exports = ({ version }) => {
const babelVersion = Number(version.split('.')[0])
let dynamicImportPlugin
if (babelVersion >= 7) {
dynamicImportPlugin = require('@babel/plugin-syntax-dynamic-import').default
} else {
dynamicImportPlugin = require('babel-plugin-syntax-dynamic-import')
}
return {
inherits: dynamicImportPlugin,
visitor: {
CallExpression(path) {
Eif (path.node.callee.type === 'Import') {
const args = path.get('arguments')
if (hasPrefetchComment(args[0].node)) return
args[0].addComment('leading', ' webpackPrefetch: true ')
}
},
},
}
}
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