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More friendly messages for non-string #1

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merged 4 commits into from
Mar 30, 2018

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Hoishin
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@Hoishin Hoishin commented Feb 14, 2018

(Originally opened at sindresorhus/parse-json#16)

When I passed undefined, the error was

TypeError: Cannot read property 'length' of undefined

For NaN, Infinity, new Set() etc,

TypeError: txt.slice is not a function

The cause was assuming the passed value is a string, so I added type check. Throws message with the type and the value converted to string if the value is not string.

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Hoishin commented Feb 19, 2018

After some discussion on sindresorhus/parse-json#16, I updated error handling.

  • If txt is an empty array [], it special-cases and says Cannot parse an empty array, since String([]) is an empty string and would be confusing.
  • Other non-strings are converted to string with String().
  • Throws TypeError

Also added a bunch of test codes to increase coverage to 100%.

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Hoishin commented Mar 30, 2018

sorry to ping @zkat , I'd appriciate if you could review this PR :)

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seems reasonable enough

@zkat zkat merged commit a476d42 into zkat:latest Mar 30, 2018
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zkat commented Mar 30, 2018

Merged and released as v1.0.2. Thanks for the contrib!

@Hoishin Hoishin deleted the fix-anbiguous-error branch March 30, 2018 18:12
iarna added a commit to npm/npm that referenced this pull request Apr 9, 2018
More friendly error messages.

PR-URL: zkat/json-parse-better-errors#1
Credit: @Hoishin
iarna added a commit to npm/npm that referenced this pull request Apr 10, 2018
More friendly error messages.

PR-URL: zkat/json-parse-better-errors#1
Credit: @Hoishin
iarna added a commit to npm/npm that referenced this pull request Apr 10, 2018
More friendly error messages.

PR-URL: zkat/json-parse-better-errors#1
Credit: @Hoishin
iarna added a commit to npm/npm that referenced this pull request Apr 11, 2018
More friendly error messages.

PR-URL: zkat/json-parse-better-errors#1
Credit: @Hoishin
iarna added a commit to npm/npm that referenced this pull request Apr 11, 2018
More friendly error messages.

PR-URL: zkat/json-parse-better-errors#1
Credit: @Hoishin
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2 participants