Service worker not being injected about jekyll-pwa

[jizusun]

@Rubyjunk

Are you experimenting with GitHub Pages or local Jekyll?

For me, the local Jekyll would successfully inject the service worker,
while the GitHub Pages would not.

This is because (according to Jekyll docs)

Plugins on GitHub Pages
GitHub Pages is powered by Jekyll. However, all Pages sites are generated using the --safe option to disable custom plugins for security reasons. Unfortunately, this means your plugins won’t work if you’re deploying to GitHub Pages.
You can still use GitHub Pages to publish your site, but you’ll need to convert the site locally and push the generated static files to your GitHub repository instead of the Jekyll source files.

[Rubydesic]

@jizusun Local jekyll with gitlab pages