Hacktoberfest 2026: the issues maintainers tagged for October, open and beginner-friendly. Browse Hacktoberfest issues

[Web API type definition issue] Missed `SchedulerPostTaskCallback` payload type parameter

Open
#2,084 0 comments 0 reactions 0 assignees View on GitHub

Nobody has claimed this yet.

Assessment

Difficulty
2/5
Estimated time
1-3 hours
Newbie friendliness
45/100
Issue type
Bug
Clarity
Clearly specified
Activity status
Stale
Tech stack
typescript
Domain
api

Research direction

Start by locating the SchedulerPostTaskCallback definition and the Scheduler.postTask declaration in the DOM library generator's inputs. Update the type so its payload parameter is represented in the callback return type, then verify the generated declaration matches the expected generic form.

Written by the indexing model from the issue text.

Description

lib.d.ts bug
Summary

SchedulerPostTaskCallback should have payload type parameter

Expected vs. Actual Behavior

Payload should be used in Scheduler.postTask.

Expected:

type SchedulerPostTaskCallback<T> = () => T

Actual:

type SchedulerPostTaskCallback = () => any

Playground Link

No response

Browser Support
  • This API is supported in at least two major browser engines (not two Chromium-based browsers).
Have Tried The Latest Releases
  • This issue applies to the latest release of TypeScript.
  • This issue applies to the latest release of @types/web.
Additional Context

No response

Dominant language
TypeScript
Stars
740
Forks
474
Avg merge
2d 8h
Merged PRs (30d)
15

Contributor guide

No contributing guide indexed for this repository

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.

More from microsoft/TypeScript-DOM-lib-generator

All issues in microsoft/TypeScript-DOM-lib-generator

Similar issues

More TypeScript issues

Get new issues in your inbox

A short digest of beginner-friendly GitHub issues.