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Enable <code>--strict</code> by default

Breaking ChangeWould introduce errors in existing codeWould introduce errors in existing code

CommittedThe team has roadmapped this issueThe team has roadmapped this issue

Fix AvailableA PR has been opened for this issueA PR has been opened for this issue

SuggestionAn idea for TypeScriptAn idea for TypeScript

Status: Open.

#62333 In microsoft/TypeScript;

· DanielRosenwasser opened on Aug 25, 2025

Change default of <code>types</code> to <code>[]</code> in <code>tsconfig.json</code>

Breaking ChangeWould introduce errors in existing codeWould introduce errors in existing code

CommittedThe team has roadmapped this issueThe team has roadmapped this issue

Fix AvailableA PR has been opened for this issueA PR has been opened for this issue

SuggestionAn idea for TypeScriptAn idea for TypeScript

Status: Open.

#62195 In microsoft/TypeScript;

· DanielRosenwasser opened on Aug 4, 2025

Assume <code>"use strict"</code> everywhere by default

Breaking ChangeWould introduce errors in existing codeWould introduce errors in existing code

CommittedThe team has roadmapped this issueThe team has roadmapped this issue

Fix AvailableA PR has been opened for this issueA PR has been opened for this issue

SuggestionAn idea for TypeScriptAn idea for TypeScript

Status: Open.

#62213 In microsoft/TypeScript;

· DanielRosenwasser opened on Aug 5, 2025

<code>lib.d.ts</code> Updates for TypeScript 6.0

BugA bug in TypeScriptA bug in TypeScript

Domain: lib.d.tsThe issue relates to the different libraries shipped with TypeScriptThe issue relates to the different libraries shipped with TypeScript

Status: Open.

#62215 In microsoft/TypeScript;

· DanielRosenwasser opened on Aug 6, 2025

Declaration file emits symbol property keys without importing them

BugA bug in TypeScriptA bug in TypeScript

Domain: Declaration EmitThe issue relates to the emission of d.ts filesThe issue relates to the emission of d.ts files

Fix AvailableA PR has been opened for this issueA PR has been opened for this issue

Status: Open.

#62257 In microsoft/TypeScript;

· privatenumber opened on Aug 11, 2025

6.0 Deprecation Candidates

DiscussionIssues which may not have code impactIssues which may not have code impact

Fix AvailableA PR has been opened for this issueA PR has been opened for this issue

Status: Open.

#54500 In microsoft/TypeScript;

· RyanCavanaugh opened on Jun 2, 2023

Deprecate alwaysStrict: false in TypeScript 6.0

Breaking ChangeWould introduce errors in existing codeWould introduce errors in existing code

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 63030

#63030 In microsoft/TypeScript;

· Copilot opened on Jan 21, 2026