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fix(@angular/build): disable TypeScript removeComments option #29474

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Merged
merged 1 commit into from
Jan 24, 2025

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Disables TypeScript's removeComments option to ensure important annotations like /* @__PURE__ */ and /* vite-ignore */ are preserved. TypeScript's comment removal can be too aggressive, potentially stripping out critical information needed by bundlers for dead code elimination. Non-essential comments will be handled by the bundler, so removing them in TypeScript isn't necessary and could lead to an increase in the final bundle size.

Closes #29470

Disables TypeScript's `removeComments` option to ensure important annotations like `/* @__PURE__ */`
and `/* vite-ignore */` are preserved. TypeScript's comment removal can be too aggressive,
potentially stripping out critical information needed by bundlers for dead code elimination.
Non-essential comments will be handled by the bundler, so removing them in TypeScript isn't necessary
and could lead to an increase in the final bundle size.

Closes angular#29470
@alan-agius4 alan-agius4 requested a review from clydin January 24, 2025 10:40
@alan-agius4 alan-agius4 added action: review The PR is still awaiting reviews from at least one requested reviewer target: patch This PR is targeted for the next patch release labels Jan 24, 2025
@alan-agius4 alan-agius4 added action: merge The PR is ready for merge by the caretaker and removed action: review The PR is still awaiting reviews from at least one requested reviewer labels Jan 24, 2025
@alan-agius4 alan-agius4 merged commit 1a3ef3b into angular:main Jan 24, 2025
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@alan-agius4 alan-agius4 deleted the remove-comments-false branch January 24, 2025 12:20
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The changes were merged into the following branches: main, 19.1.x

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Bunch of warnings: "The above dynamic import cannot be analyzed by Vite."
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