A service worker file is a script that your browser runs in the background, separate from a web page, opening the door to features that don’t need a web page or user interaction. Today, it already includes features like push notifications and background sync.
The following points need to be kept in mind:
- If there are multiple service worker(sw.js) files, then only the file whose script that loads first will be active and the rest of the files will be ignored.
- If the service worker file is placed in your root directory with a different name other than sw.js, then the following step needs to be done to make sure that the .js file will work in tandem with the service. For example– If you’ve named your service worker file as “service-worker.js”, then you need to add a piece of code which looks like this-
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