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26 lines
1.1 KiB
JavaScript
26 lines
1.1 KiB
JavaScript
// A dev-only middleware that resets service workers for the current host:port
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// This is for dealing with cases where a developer loads the dev and prod
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// versions of an app on the same host:port combination, causing the prod
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// service worker to hijack subsequent visists in dev mode.
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// Note this doesn't always immediately fix the problem - if the server used
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// to serve the production app has a long cache header for /service-worker.js,
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// this noop service worker will not be able to take effect. In such cases,
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// the developer will have to manually unregister the service worker in
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// Chrome Devtools -> Application -> Service Workers
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const fs = require('fs')
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const path = require('path')
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const resetScript = fs.readFileSync(path.resolve(__dirname, 'noopServiceWorker.js'), 'utf-8')
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module.exports = function createNoopServiceWorkerMiddleware () {
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return function noopServiceWorkerMiddleware (req, res, next) {
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if (req.url === '/service-worker.js') {
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res.setHeader('Content-Type', 'text/javascript')
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res.send(resetScript)
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} else {
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next()
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}
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}
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}
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