Integration with Chrome Devtools Coverage

[jackyef]

Chrome Devtools Coverage

Summary
Is it possible for to make lighthouse integrate with Chrome Devtools Coverage?
Basically, this is how I imagine it would be:

1. Run lighthouse against an url, like usual
2. Along with the usual outputs, lighthouse will also output a coverage.json from Chrome devtools
3. Lighthouse can use this information to show the unused codes in each assets in its report
4. Bonus: Lighthouse could show a visualisation from the coverage json using available source map (if exists), like what source-map-explorer did recently.

I couldn't find if it's actually possible currently to do this. Apologies if it already exists 🙏

[connorjclark]

We have the unused-javascript audit, which shows how much code is unused. It's not granular yet, but #10090 is working on that.

re: 4- #10064 is a preview of what we're doing with source maps. We have a working demo for using source-map-explorer, with plans to show coverage data too.

[jackyef]

Whoa, that is awesome! Can't wait to see it live!