Adding sourcemaps to vue dev builds

[iloveitaly]

Super helpful for in-browser debugging.

[codecov]

Codecov Report

Merging #281 (199c0ae) into master (165ec2f) will not change coverage.
The diff coverage is n/a.

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##           master     #281   +/-   ##
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  Coverage   15.91%   15.91%           
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  Files          22       22           
  Lines        1062     1062           
  Branches      110      110           
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  Hits          169      169           
  Misses        848      848           
  Partials       45       45           

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[ErikBjare]

I'm a bit surprised that sourcemaps aren't generated by default for you. I do remember having issues with sourcemaps in the past, but can't remember if I've had any recent issues.

I found that there's a productionSourcemap option that is even set to true by default, so it seems like it should definitely be set in development builds: https://cli.vuejs.org/config/#productionsourcemap

I also skimmed vuejs/vue-cli#1806 and there seems to be quite a few common issues both with setting this (relating to performance) and with leaving the defaults, not sure what setting this actually does/improves.

Sourcemaps are indeed supposed to be enabled by default: vuejs/vue-cli#1806 (comment)

[iloveitaly]

Interesting, if you run vue-cli-service build without any arguments sourcemaps are generated. However, if you run build with --watch sourcemaps are not generated. I posted this in the issue thread to see if we get any interesting responses.

[ErikBjare]

Excellent, was just going to suggest you add this comment :)

[ErikBjare]

Merging!