refactor: functional filename should be called from webpack

[clarkdo]

@Atinux Improvement for #3787

[codecov-io]

Codecov Report

Merging #3788 into dev will increase coverage by <.01%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##              dev    #3788      +/-   ##
==========================================
+ Coverage   97.84%   97.84%   +<.01%     
==========================================
  Files          18       18              
  Lines        1158     1159       +1     
  Branches      312      312              
==========================================
+ Hits         1133     1134       +1     
  Misses         24       24              
  Partials        1        1

Impacted Files	Coverage Δ
lib/builder/webpack/base.js	98.36% <100%> (+0.02%)	⬆️

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