microsoft / microsoft/TypeScript
In JS, `object` is treated as 'any'
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checkJs
Domain: JavaScript
Domain: JSDoc
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Description
TypeScript Version: 3.0.0-dev.20180711
Code
/** @typedef {object} T */
/** @type {T} */
const x = 0;
Expected behavior:
Error at x: 0 is not an object.
Actual behavior:
No error.
Contributor guide
First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
Start by reproducing the TypeScript Version 3.0.0-dev.20180711 example with the JSDoc @typedef and @type annotations shown in the issue. Trace the JavaScript checking path for object types and compare the reported result with the expected error at x. Done means the example reports that 0 is not an object, with tests covering this behavior.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- javascript, typescript
- Domain
- compilers
- Issue type
- Bug
- Difficulty
- 3/5
- Estimated time
- 1-2 days
- Activity status
- Quiet
- Clarity
- Clearly specified
- Newbie friendliness
- 52/100