microsoft / microsoft/TypeScript

Missing `Go to definition` links when accessing properties after `jsdoc` typecast

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Description

🔎 Search Terms

jsdoc typecast, typecast property access, jsdoc go to definition

🕗 Version & Regression Information
  • This is the behavior in every version I tried, and I reviewed the FAQ for entries about jsdoc, typecast
⏯ Playground Link

https://www.typescriptlang.org/play/?ts=5.6.3&filetype=js#code/PQKhAIAEBcE8AcCmATRAzcBvT4B2BDAW0QC5wBnaAJwEtcBzcAXyfADEB7D8EYAKD4BjDrkrgOAIwBW4ALzhQEGAkRZOHVrwAUmJgEoA3H2DBwACQ4A3RFXAB3GtAAW4AAaDqAG1fjrt1+o+EoieHHbgyByI5LgA5NDgVIjC9Lg0AF6qzlkqEeh0jjQiQiJiklIAjHIKYFBwSGpcmsA6+gB0BMRGwqIJ5QBM1Yp1uZjqza16ANqxnYixALpGfEA

💻 Code
/** @typedef {{ name: string }} Foo */

const obj = /** @type {Foo} */({});
// Hover with `ctrl` over `Foo` below doesn't recognize the type definition
const obj1 = /** @type {Foo} */({}).name;
const obj2 = /** @type {Foo} */({})['name'];
🙁 Actual behavior

Hovering over Foo with ctrl pressed doesn't recognize the type definition

🙂 Expected behavior

Hovering over Foo with ctrl pressed recognizes the type definition

Additional information about the issue

No response

Contributor guide

Open the contributing guide

First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Reproduce the missing go-to-definition behavior in the linked TypeScript Playground using the JSDoc typecast examples, then trace the language-service handling for the typecast followed by .name and ['name'] access. Done means Ctrl-hovering Foo in both property-access forms recognizes and links to the typedef.

Written by the indexing model from the issue text.

Assessment

Tech stack
javascript, typescript
Domain
developer-experience
Issue type
Bug
Difficulty
4/5
Estimated time
3-5 days
Activity status
Stale
Clarity
Mostly clear
Newbie friendliness
45/100

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