fix(web-components): Fix build errors in TypeScript 5.3.3#30815
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behowell wants to merge 2 commits intomicrosoft:masterfrom
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fix(web-components): Fix build errors in TypeScript 5.3.3#30815behowell wants to merge 2 commits intomicrosoft:masterfrom
behowell wants to merge 2 commits intomicrosoft:masterfrom
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This was referenced Mar 18, 2024
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📊 Bundle size report🤖 This report was generated against 5e690201797c6b1ce34ac59638fd4a77a0f5a2b3 |
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This was referenced Mar 18, 2024
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Previous Behavior
TypeScript 5 introduced some breaking changes to the way that implicit type coercion happens in templates, as well as a few other breaking changes. Although we don't currently use TypeScript 5.3.3 in the repo, experimental work in the
xplatbranch requires building against TypesScript 5+. There are also customers using TypeScript 5+, who are seeing build errors when importing FluentUI.New Behavior
Fix build errors seen if the repo is updated to TypeScript 5.3.3. This is part of a set of PRs intending to fix all build errors when building against TypeScript 5.3.3.
The fixes in this PR are all caused by:
{}.extends {}constraint to template types that previously had no constraint (effectivelyextends unknown). The new constraint disallowsnullandundefinedas template parameters, which were never valid values for these type parameters anyways.ℹ️ Note: This is NOT updating the project to use TypeScript 5.3.3, and an update to the TypeScript version is not planned as part of this change. It is only fixing build errors that would occur if it were built against TypeScript 5.3.3.
Related Issue(s)
This PR was split out from a monolith PR that contains all of the changes. I'm not going to publish the monolith PR, but in case it helps to see all of the changes in one place:
Here are all of the split-out PRs: