microsoft / microsoft/TypeScript

Flag for strict default function `this` types for call-site and assignability checking (`--strictThis`)

Open
#7,968 14 comments 57 reactions 0 assignees View on GitHub

Nobody has claimed this yet.

Awaiting More Feedback Suggestion
Dominant language
Go
Stars
111k
Forks
14.3k
Avg merge
2d 4h
Merged PRs (30d)
132

Description

#6018 was originally going to add a --strictThis flag that made function this types default to void or the enclosing class (instead of any) for purposes of call-site and assignability checking, but that functionality was dropped (details). This is a follow-up suggestion for the dropped functionality, whatever the flag ends up being named.

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

Start by reading issue #6018 and the linked comment describing why the original functionality was dropped. Clarify the intended strict this defaults, call-site and assignability behavior, and the eventual flag name before implementation; the issue does not identify files or tests, so completion criteria still need to be established.

Written by the indexing model from the issue text.

Assessment

Tech stack
typescript
Domain
compilers
Issue type
Feature
Difficulty
5/5
Estimated time
Over a week
Activity status
Stale
Clarity
Needs clarification
Newbie friendliness
25/100

Get new issues in your inbox

A short digest of beginner-friendly GitHub issues.