Why does my create-react-app have no service workers?

I used the simplest and the dumbest command

npx create-react-app mia-app
cd mia-app
npm start

But after created the project everytime there are no serviceWorker. Can someone help me?

However, I've tried with npm create-create-app with this res.

Upvotes: 3

Answers (3)

user17783468

Reputation: 21

I had forgotten to change the call to unregister to register in serviceWorkerRegistration.ts. However, even after I did that, I didn't see a service worker show up. After looking at the register function, I realized that the service worker won't run on non-prod build so you'll have to address this issue How can i enable service worker in dev mode in create-react-app? if you want to see it with npm start. This is an unresolved issue as dev mode does not serve up service-worker.js

Upvotes: 0

James Whiteley

Reputation: 3474

serviceWorker.js is no longer included in the base template, as of create-react-app version 4.0.something.

Trawling through the create-react-app GitHub issues, two main workarounds keep popping up:

Create an app using the following template:

npx create-react-app my-app --template cra-template-pwa

or for Typescript:

npx create-react-app my-app --template cra-template-pwa-typescript

(where my-app is replaced by the name of your app)

If you already have an existing project, create a dummy app and copy over the relevant code. Don't forget to copy over the initialisation code from index.js/index.tsx if you do this too.

Upvotes: 8

Giovanni Giampaolo

Reputation: 463

For who have the same problem as suggested by James Whiteley you can use the following command

npx create-react-app my-app --template <app-name>

For more info check this github issue https://github.com/facebook/create-react-app/issues/10104

Upvotes: -1

Why does my create-react-app have no service workers?

Answers (3)

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