microsoft / microsoft/TypeScript
Hovering `function` and `class` shows their type, but hovering `type`, `var`, `let` and `const` does not
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Domain: LS: Quick Info
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Description
TS stable and nightly
// # Shows type on hover
function foo() {}
// ^?
// function foo(): void
class Foo {}
// ^?
// class Foo
// # Shows nothing on hover
type bar = () => void;
// ^?
const bar = () => {};
// ^?
let leet = () => {};
// ^?
var teel = () => {};
// ^?
Expected to see type of variable when hovering statement
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 with the linked TypeScript Playground reproduction and compare hover behavior for function, class, type, const, let, and var declarations in stable and nightly. Trace the language-service hover path for these declarations; the issue is done when variable and type declarations show their types on hover consistently with the expected examples.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- typescript
- Domain
- developer-experience
- Issue type
- Bug
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Activity status
- Stale
- Clarity
- Clearly specified
- Newbie friendliness
- 35/100