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next.js/server/build/plugins/dynamic-chunks-plugin.js

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export default class PagesPlugin {
apply (compiler) {
const isImportChunk = /^chunks[/\\].*\.js$/
const matchChunkName = /^chunks[/\\](.*)$/
compiler.plugin('after-compile', (compilation, callback) => {
const chunks = Object
.keys(compilation.namedChunks)
.map(key => compilation.namedChunks[key])
.filter(chunk => isImportChunk.test(chunk.name))
chunks.forEach((chunk) => {
const asset = compilation.assets[chunk.name]
if (!asset) return
const chunkName = matchChunkName.exec(chunk.name)[1]
const content = asset.source()
const newContent = `
window.__NEXT_REGISTER_CHUNK('${chunkName}', function() {
${content}
})
`
// Replace the exisiting chunk with the new content
compilation.assets[chunk.name] = {
source: () => newContent,
size: () => newContent.length
}
// This is to support, webpack dynamic import support with HMR
compilation.assets[`chunks/${chunk.id}`] = {
source: () => newContent,
size: () => newContent.length
}
})
callback()
})
}
}