workbox-build: generate minified output?

[UltCombo]

Library Affected:
workbox-build, workbox-webpack-plugin

Browser & Platform:
all browsers

Issue or Feature Request Description:
Hello, I would like a way to emit minified output from workbox. I see the libraries already have a minified production version, but it seems there's no option to minify the output from workbox-build.

I'm using the Workbox Webpack plugin specifically, but I believe this option could be useful for the whole ecosystem.

[gauntface]

The webpack plugin should fit in with the build pipeline a little better in V3.

@jeffposnick, @goldhand do either of you know if this would be fixed by your changes?

[jeffposnick]

This functionality is not currently in v3. It's worth keeping open to track the request. (And PR contributions are welcome!)

[gauntface]

FYI: I'm not suggesting we build minification into workbox-build, just that we should work with a webpack setup that has minification.

[UltCombo]

should work with a webpack setup that has minification.

👍
Currently, my build script does a second Webpack run configured specifically to minify the generated service worker from the first run. Not ideal, but it suffices for the time being.

[prateekbh]

FYI: I'm not suggesting we build minification into workbox-build, just that we should work with a webpack setup that has minification.

need to check the current code. But in case we're still listening to emit event from webpack, this might need some substantial work

[gauntface]

@UltCombo is there any chance you have an example webpack config that should result in minified output?

[dyaa]

Any updates on this?

[jeffposnick]

This is now possible via terser starting in the Workbox v5 alphas, when mode: 'production':

https://github.com/GoogleChrome/workbox/blob/cff916d997600489ba48728be9ec33b28f745c6b/packages/workbox-build/src/lib/bundle.js#L50-L59