Typescript 5.8

Creator

Creator

Seonglae Cho

Created

Created

2025 Jul 16 13:51

Editor

Editor

Seonglae Cho

Edited

Edited

2026 Jun 24 16:9

Refs

Refs

ReScript

TypeScript 5.8 Ships --erasableSyntaxOnly To Disable Enums

TypeScript 5.8's new erasableSyntaxOnly flag enforces pure type annotations by disabling enums, namespaces, and parameter properties.

https://www.totaltypescript.com/erasable-syntax-only

TypeScript 5.8 Ships --erasableSyntaxOnly To Disable Enums

Erasable Syntax Only

From the start, allow only TypeScript syntax that has no runtime meaning:

TSConfig Reference - Docs on every TSConfig option

From allowJs to useDefineForClassFields the TSConfig reference includes information about all of the active compiler flags setting up a TypeScript project.

https://www.typescriptlang.org/tsconfig/#erasableSyntaxOnly

Recommendations

//////////