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next.config.js
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next.config.js
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const withOffline = require("next-offline");
const nextConfig = {
target: "serverless",
transformManifest: (manifest) => ["/"].concat(manifest), // add the homepage to the cache
// Trying to set NODE_ENV=production when running yarn dev causes a build-time error so we
// turn on the SW in dev mode so that we can actually test it
generateInDevMode: true,
workboxOpts: {
swDest: process.env.NEXT_EXPORT
? "service-worker.js"
: "static/service-worker.js",
runtimeCaching: [
{
urlPattern: /^https?.*/,
handler: "NetworkFirst",
options: {
cacheName: "https-calls",
networkTimeoutSeconds: 15,
expiration: {
maxEntries: 150,
maxAgeSeconds: 30 * 24 * 60 * 60, // 1 month
},
cacheableResponse: {
statuses: [0, 200],
},
},
},
{
urlPattern: /.(?:png|webp|svg)$/,
handler: "CacheFirst",
},
],
},
experimental: {
rewrites() {
return [
{
source: "/service-worker.js",
destination: "/_next/static/service-worker.js",
},
];
},
headers() {
return [
{
source: "/service-worker.js",
headers: [
{
key: "Cache-Control",
value: "public, max-age=43200, immutable",
},
{
key: "Service-Worker-Allowed",
value: "/",
},
],
},
];
},
},
};
module.exports =
process.env.NODE_ENV === "development"
? nextConfig
: withOffline(nextConfig);