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Support .js imports from typescript #510

Merged
merged 3 commits into from
Feb 21, 2020
Merged

Support .js imports from typescript #510

merged 3 commits into from
Feb 21, 2020

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guybedford
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@guybedford guybedford commented Feb 20, 2020

This resolves #508 in allowing the pattern for TypeScript code using .js extensions to reference other TypeScript files.

This is currently recommended by the TypeScript team (microsoft/TypeScript#16577 (comment)) as an approach for writing TypeScript that will include the file extensions in the output files when using tsc manually, resulting in Node.js and browser compatibility for the output.

With this PR, ncc doesn't have to break enabling this workflow for users, while remaining backwards compatible with the previous behaviour so it would be fine to release this as a minor.

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@styfle
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styfle commented Feb 20, 2020

@guybedford Do we also need too add this behavior to node-file-trace?

@styfle styfle changed the title Support .js ts imports Support .js imports from typescript Feb 20, 2020
@guybedford
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@styfle thanks for the quick review. Yes ideally node-file-trace would include the same (if it doesn't support it already), and this is something I'd recommend checking in other workflows too.

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Ok, I've included a guard that this extension fallback only happens when importing from another TypeScript file, and I also added a test here for nested imports of .ts.

@guybedford guybedford requested a review from styfle February 20, 2020 15:43
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Thanks!

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Supporting .js imports for TypeScript
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