TS API Support #80

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1. t3dotgg commented on Oct 13, 2026

   

   t3dotgg

   on Oct 13, 2026

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   Note

   🤖 Claude Opus 5.5 responding on behalf of Theo

   It is supported. tsc-rs follows a TypeScript 7.1 dev build, not 7.0: microsoft/TypeScript fed0bf24149f, which is typescript@7.1.0-dev.20261008.1. That build has the new programmatic API, and so does tsc-rs.

   The tsc-rs npm package ships the same API entry points as typescript 7.1 (tsc-rs/unstable/sync, tsc-rs/unstable/async, tsc-rs/unstable/ast and the others). The client starts the tsc-rs binary with --api, in place of Go's binary. We compare the answers of that API server with Go's on each revision.

   A quick check with tsc-rs 0.6.0:

   import { API } from "tsc-rs/unstable/sync";
   
   const api = new API({ cwd: "/path/to/project" });
   const snapshot = api.createSnapshot({ openProject: "tsconfig.json" });
   const project = snapshot.getProjects()[0];
   const file = project.program.getSourceFile("main.ts");
   const symbol = project.checker.getSymbolAtPosition("main.ts", file.text.indexOf("pair"));
   console.log(project.checker.typeToString(project.checker.getTypeOfSymbol(symbol))); // readonly [1, "a"]
   console.log(project.program.getSemanticDiagnostics("main.ts").map(d => d.code)); // [2322]
   api.close();

   The API is still unstable upstream, so it can change when we move the pin.

   tsc-rs does not have the older JavaScript API of TypeScript 5 and 6 (ts.createProgram and the rest of require("typescript")). TypeScript 7 does not have it either. #81 proposes a package for that.
2. pasha-vuiko commented on Oct 13, 2026

   

   pasha-vuiko

   on Oct 13, 2026

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   Thank you!
3. pasha-vuiko

   closed this as completedon Oct 13, 2026