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Allow readonly array as parameter to .aliases(), .parse(), .parseAsync() #1669

merged 2 commits into from Jan 3, 2022


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@shadowspawn shadowspawn commented Jan 2, 2022

Pull Request


readonly array cannot be passed directly as parameter to .aliases(), .parse(), or .parseAsync().

Work-around: make a modifiable copy, like by calling .slice().

Following pattern used in #1667 for .choices().


No implementation changes needed, just declaration and tests.

  • add readonly to TypeScript declaration file
  • add readonly test to TypeScript tests
  • add readonly tests of JavaScript implementation


  • changed: allow passing readonly string array to .parse()
  • changed: allow passing readonly string array to .parseAsync()
  • changed: allow passing readonly string array to .aliases()

abetomo approved these changes Jan 3, 2022
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@abetomo abetomo left a comment


@shadowspawn shadowspawn added the pending release label Jan 3, 2022
@shadowspawn shadowspawn added this to the Commander v9.0.0 milestone Jan 3, 2022
@shadowspawn shadowspawn merged commit f17ecbd into tj:release/9.x Jan 3, 2022
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@shadowspawn shadowspawn deleted the feature/more-readonly branch Jan 3, 2022
@shadowspawn shadowspawn removed the pending release label Jan 29, 2022
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2 participants