Fix incorrect Cache-Busting for CSS

[menthol]

Chunkhash do not work with css content.

See https://medium.com/@okonetchnikov/long-term-caching-of-static-assets-with-webpack-1ecb139adb95#.f9aon6s3b

[codecov-io]

Codecov Report

Merging #1390 into dev will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##              dev    #1390   +/-   ##
=======================================
  Coverage   92.63%   92.63%           
=======================================
  Files          12       12           
  Lines         788      788           
=======================================
  Hits          730      730           
  Misses         58       58

Impacted Files	Coverage Δ
lib/common/options.js	89.13% <ø> (ø)	⬆️

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[pi0]

Hi. Thanks for the PR and tip. Seems contenthash is only specific to extractTextPlugin. Also vue-hacker-news uses chunkhash for css assets too.
What's your idea adding a condition to use chunkhash when extractCSS is false?

UPDATE Never mind :D that's not even needed as this name is only used for this plugin :))

[lock]

This thread has been automatically locked since there has not been any recent activity after it was closed. Please open a new issue for related bugs.