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Fix exhaustiveness checking for single-member enums in switch statements

For Milestone BugPRs that fix a bug with a specific milestonePRs that fix a bug with a specific milestone

Status: Draft (not ready).

microsoft/TypeScriptnumber 62900

#62900 In microsoft/TypeScript;

· Copilot opened on Dec 15, 2025

Fix "never nullish" diagnostic missing expressions wrapped in parentheses

For Uncommitted BugPR for untriaged, rejected, closed or missing bugPR for untriaged, rejected, closed or missing bug

Status: Open (in progress).

microsoft/TypeScriptnumber 62789

#62789 In microsoft/TypeScript;

· Copilot opened on Nov 21, 2025

Fix JSX fragment children type checking in react-jsx mode

For Milestone BugPRs that fix a bug with a specific milestonePRs that fix a bug with a specific milestone

Status: Draft (not ready).

microsoft/TypeScriptnumber 62743

#62743 In microsoft/TypeScript;

· Copilot opened on Nov 10, 2025

Fix TS2878 error location reporting by adding errorNode checks

For Uncommitted BugPR for untriaged, rejected, closed or missing bugPR for untriaged, rejected, closed or missing bug

Status: Draft (not ready).

microsoft/TypeScriptnumber 62437

#62437 In microsoft/TypeScript;

· Copilot opened on Sep 11, 2025

Fix contextual typing sensitivity to binding pattern structure in destructuring

For Milestone BugPRs that fix a bug with a specific milestonePRs that fix a bug with a specific milestone

Status: Draft (not ready).

microsoft/TypeScriptnumber 62142

#62142 In microsoft/TypeScript;

· Copilot opened on Jul 28, 2025

Fix "used before being assigned" error with type assertions in LHS

For Uncommitted BugPR for untriaged, rejected, closed or missing bugPR for untriaged, rejected, closed or missing bug

Status: Open (in progress).

microsoft/TypeScriptnumber 62128

#62128 In microsoft/TypeScript;

· Copilot opened on Jul 25, 2025

Prioritize <code>case</code> and <code>default</code> keywords in switch statement completions

For Uncommitted BugPR for untriaged, rejected, closed or missing bugPR for untriaged, rejected, closed or missing bug

Status: Draft (not ready).

microsoft/TypeScriptnumber 62126

#62126 In microsoft/TypeScript;

· Copilot opened on Jul 25, 2025

Fix isolated declarations to not flag function expressions in call arguments

For Milestone BugPRs that fix a bug with a specific milestonePRs that fix a bug with a specific milestone

Status: Draft (not ready).

microsoft/TypeScriptnumber 62125

#62125 In microsoft/TypeScript;

· Copilot opened on Jul 25, 2025

Derive disposability checks from known symbols rather than global interfaces

For Uncommitted BugPR for untriaged, rejected, closed or missing bugPR for untriaged, rejected, closed or missing bug

Status: Draft (not ready).

microsoft/TypeScriptnumber 62122

#62122 In microsoft/TypeScript;

· Copilot opened on Jul 24, 2025

Enable exhaustiveness checking and never narrowing for non-union types

For Milestone BugPRs that fix a bug with a specific milestonePRs that fix a bug with a specific milestone

Status: Draft (not ready).

microsoft/TypeScriptnumber 62114

#62114 In microsoft/TypeScript;

· Copilot opened on Jul 23, 2025

Fix crash when using non-null assertion on await expressions with NODE_ENV=development

For Milestone BugPRs that fix a bug with a specific milestonePRs that fix a bug with a specific milestone

Status: Open (in progress).

microsoft/TypeScriptnumber 62074

#62074 In microsoft/TypeScript;

· Copilot opened on Jul 15, 2025

Fix false positive "no overlap" error when comparing <code>this</code> with subclass instances

For Milestone BugPRs that fix a bug with a specific milestonePRs that fix a bug with a specific milestone

Status: Open (in progress).

microsoft/TypeScriptnumber 62070

#62070 In microsoft/TypeScript;

· Copilot opened on Jul 15, 2025