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[gatsby] don't run service-workers outside of https or localhost #3502

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1 change: 1 addition & 0 deletions CONTRIBUTING.md
Original file line number Diff line number Diff line change
Expand Up @@ -34,6 +34,7 @@ The usual contributing steps are:
build of all packages and then watch for changes to packages' source code and
compile these changes on-the-fly as you work.
* Install [gatsby-dev-cli](/packages/gatsby-dev-cli/) globally: `yarn global add gatsby-dev-cli`
* Run `yarn install` in each of the sites you're testing with.
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If you run yarn install first, then gatsby-dev will copy over correctly all your source updates.

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👍

* For each of your Gatsby test sites, run the `gatsby-dev` command there to copy
the built files from your cloned copy of Gatsby. It'll watch for your changes
to Gatsby packages and copy them into the site. For more detailed instructions
Expand Down
9 changes: 8 additions & 1 deletion packages/gatsby/cache-dir/app.js
Original file line number Diff line number Diff line change
Expand Up @@ -24,7 +24,7 @@ apiRunnerAsync(`onClientEntry`).then(() => {
*
* Let's unregister the service workers in development, and tidy up a few errors.
*/
if (`serviceWorker` in navigator) {
if (supportsServiceWorkers(location, navigator)) {
navigator.serviceWorker.getRegistrations().then(registrations => {
for (let registration of registrations) {
registration.unregister()
Expand Down Expand Up @@ -69,3 +69,10 @@ apiRunnerAsync(`onClientEntry`).then(() => {
})
}
})

function supportsServiceWorkers(location, navigator){
if (location.hostname === `localhost` || location.protocol === `https:`){
return `serviceWorker` in navigator
}
return false
}