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Generated lib*.d.ts files differ from the files in TypeScript SDK #41597

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Generated lib*.d.ts files differ from the files in TypeScript SDK#41597
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BugA bug in TypeScriptDomain: lib.d.tsThe issue relates to the different libraries shipped with TypeScriptEffort: ModerateRequires experience with the TypeScript codebase, but feasible. Harder than "Effort: Casual".Help WantedYou can do this
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Backlog

Description

@deniskovalchuk
Denis Kovalchuk (deniskovalchuk)
opened on Nov 19, 2020

TypeScript Version: at least 3.9.7 and 4.0.5

The lib/lib*.d.ts and built/local/lib*.d.ts files contain mixed line breaks (LF/CRLF) and differ from the files in the TypeScript SDK, which contain only LF.

Steps to reproduce

Build LKG or local on any operating system.

git clone --config core.autocrlf=input https://github.com/microsoft/TypeScript.git
cd TypeScript
npm ci
gulp LKG

Expected behavior:

Consistent line breaks in lib*.d.ts files and no differences from the TypeScript SDK.

Actual behavior:

Mixed line breaks.

actual-line-breaks

Activity

  1. Ryan Cavanaugh (RyanCavanaugh)
    added
    BugA bug in TypeScript
    on Nov 20, 2020
  2. Ryan Cavanaugh (RyanCavanaugh)
    added this to the Backlog milestone on Nov 20, 2020
  3. Daniel Rosenwasser (DanielRosenwasser)
    added
    Domain: lib.d.tsThe issue relates to the different libraries shipped with TypeScript
    Help WantedYou can do this
    Effort: ModerateRequires experience with the TypeScript codebase, but feasible. Harder than "Effort: Casual".
    on Nov 20, 2020

  4. jakebailey commented on Jul 5, 2023

    @jakebailey
    Jake Bailey (jakebailey)
    on Jul 5, 2023
    Member

    Post #51387, this one is definitely fixed as the problem here was the way we combined things with gulp (among other things). In the new build, the entirety of built and lib now consistently use LF line endings.

  5. Jake Bailey (jakebailey)
    closed this as completedon Jul 5, 2023

  6. deniskovalchuk commented on Jul 6, 2023

    @deniskovalchuk
    Denis Kovalchuk (deniskovalchuk)
    on Jul 6, 2023
    Author

    Jake Bailey (@jakebailey), I've tested TypeScript 5.1.6 and can confirm that this problem has been fixed. Thank you!

  7. microsoft
    locked as resolved and limited conversation to collaborators on Oct 21, 2025
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    BugA bug in TypeScriptDomain: lib.d.tsThe issue relates to the different libraries shipped with TypeScriptEffort: ModerateRequires experience with the TypeScript codebase, but feasible. Harder than "Effort: Casual".Help WantedYou can do this

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