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next.config.js
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const withPrefresh = require('@prefresh/next')
module.exports = withPrefresh({
experimental: {
modern: true,
polyfillsOptimization: true,
},
webpack(config, { dev, isServer }) {
// Move Preact into the framework chunk instead of duplicating in routes:
const splitChunks = config.optimization && config.optimization.splitChunks
if (splitChunks) {
const { cacheGroups } = splitChunks
const test = /[\\/]node_modules[\\/](preact|preact-render-to-string|preact-context-provider)[\\/]/
if (cacheGroups.framework) {
cacheGroups.preact = { ...cacheGroups.framework, test }
// if you want to merge the 2 small commons+framework chunks:
cacheGroups.commons.name = 'framework'
}
}
if (isServer) {
// mark `preact` stuffs as external for server bundle to prevent duplicate copies of preact
config.externals.push(/^(preact|preact-render-to-string|preact-context-provider)([\\/]|$)/)
}
// Install webpack aliases:
const aliases = config.resolve.alias || (config.resolve.alias = {})
aliases['react'] = 'preact/compat'
aliases['react-dom'] = 'preact/compat'
aliases['react-ssr-prepass'] = 'preact-ssr-prepass'
// inject Preact DevTools
if (dev && !isServer) {
const { entry } = config
config.entry = () =>
entry().then((entries) => {
entries['main.js'] = ['preact/debug'].concat(entries['main.js'] || [])
return entries
})
}
return config
},
poweredByHeader: false,
})