Microsoft shipped the latest iteration of its type-infused superset of JavaScript, TypeScript 5.5, introducing inferred type predicates, control flow narrowing, JSDoc @import and other enhancements.

TypeScript 3.8, a new version of Microsoft’s typed superset of JavaScript, is now available as a production release. The latest TypeScript upgrade emphasizes type-only imports and exports and ...

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With any major version release, it is not unexpected for breaking changes to be introduced and that's certainly the case for TypeScript 3.0. One obvious change is that with "unknown" becoming a new ...