Source mappings are missing for serialized properties

🔎 Search Terms

source map declaration map properties symbols navigation definition goto

🕗 Version & Regression Information

• This is the behavior in every version I tried

⏯ Playground Link

N/A

💻 Code

// api.ts
type ValidateShape<T> = {
  [K in keyof T]: T[K];
};

function test<T>(arg: ValidateShape<T>) {
  function createCaller<T>(arg: T): () => {
    [K in keyof T]: () => T[K];
  } {
    return null as any;
  }
  return {
    createCaller: createCaller(arg),
  };
}

const api = test({
  foo/*target*/: 1,
  bar: "",
});

export const createCaller = api.createCaller;

// main.ts

import { createCaller } from "./api";
const caller = createCaller();
caller.foo/*source*/;

🙁 Actual behavior

Please consider the 2 files above as 2 separate projects.

When those files are in the same project we can successfully go from the source marker to the target marker with "go to definition" and others like it. The same works with project references on.

However, when api.ts gets compiled with declaration maps and consumed through that then this navigation no longer works correctly.

🙂 Expected behavior

I'd expect this navigation to continue to work

Additional information about the issue

No response

首先使用 api.ts 和 main.ts 重现双项目场景，使用 declaration maps 编译 api.ts，并在 main.ts 中使用它。跟踪从 caller.foo 到 foo 属性的 source-map 和 go-to-definition 行为；当导航跨越生成的声明到达 target marker 时，即可认为 issue 已完成。