In retrospect define4/10/2023 Now that might sound surprising – modules? If you’re importing protocol.d.ts, you can switch to tsserverlibrary.d.ts and leverage ts.server.protocol.įinally, as a contributor of TypeScript, your life will likely become a lot easier.īuild times will be a lot faster, incremental check times should be faster, and you’ll have a more familiar authoring format if you already write TypeScript code outside of our compiler. If you rely on TypeScript’s typescriptServices.js and typescriptServices.d.ts files, you’ll be able to rely on typescript.js/ typescript.d.ts instead. That means existing build scripts will still work. TypeScript won’t be shipping its API as ES modules yet, and will still provide a CommonJS-authored API. Running TypeScript will get a nice bit faster – typically cutting down build times of anywhere between 10%-25%.Īs an API consumer of TypeScript, you’ll likely be unaffected. Npm installs should go a little faster and take up less space, since the typescript package size should be reduced by about 46%. It’s good to know what this does and doesn’t mean for TypeScript 5.0.Īs a general user of TypeScript, you’ll need to be running Node.js 12 at a minimum. Now, before we dive in, we want to set expectations. In TypeScript 5.0, we restructured our entire codebase to use ECMAScript modules, and switched to a newer emit target. One of the most impactful things we’ve worked on in TypeScript 5.0 isn’t a feature, a bug fix, or a data structure optimization.
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