Default `target` to "latest standard", deprecate ES5 by jakebailey · Pull Request #63067 · microsoft/TypeScript

Jake Bailey (jakebailey) · 2026-01-30T03:37:34Z

target now defaults to ScriptTarget.LatestStandard, which is an alias to the most recent standardized ES version, currently ES2024 (until we add ES2025).

target=ES5 is now deprecated.

#63066 got most tests ready, but a few unit tests still needed to be updated. Individual commits may be a better way to review this.

Fixes#62196
Fixes#62198

TypeScript Bot (typescript-bot) · 2026-01-30T03:38:00Z

Thanks for the PR! It looks like you've changed the TSServer protocol in some way. Please ensure that any changes here don't break consumers of the current TSServer API. For some extra review, we'll ping Sheetal Nandi (@sheetalkamat), Matt Bierner (@mjbvz), and Joaquin Jares (@joj) for you. Feel free to loop in other consumers/maintainers if necessary.

TypeScript Bot (typescript-bot) · 2026-01-30T03:38:01Z

Looks like you're introducing a change to the public API surface area. If this includes breaking changes, please document them on our wiki's API Breaking Changes page.

Also, please make sure Daniel Rosenwasser (@DanielRosenwasser) and Ryan Cavanaugh (@RyanCavanaugh) are aware of the changes, just as a heads up.

Jake Bailey (jakebailey) · 2026-01-30T03:38:19Z

TypeScript Bot (@typescript-bot) test it
TypeScript Bot (@typescript-bot) pack this

TypeScript Bot (typescript-bot) · 2026-01-30T03:38:24Z

Starting jobs; this comment will be updated as builds start and complete.

Command	Status	Results
`pack this`	✅ Started	✅ Results
`test top400`	✅ Started	👀 Results
`user test this`	✅ Started	👀 Results
`run dt`	✅ Started	👀 Results
`perf test this faster`	✅ Started	👀 Results

TypeScript Bot (typescript-bot) · 2026-01-30T03:42:49Z

Hey Jake Bailey (@jakebailey), I've packed this into an installable tgz. You can install it for testing by referencing it in your package.json like so:

{
"devDependencies": {
"typescript": "https://typescript.visualstudio.com/cf7ac146-d525-443c-b23c-0d58337efebc/_apis/build/builds/167004/artifacts?artifactName=tgz&fileId=EF769C50B14300245DEC1C19259502941AC541B769FEE5839095048E28F6936902&fileName=/typescript-6.0.0-insiders.20260130.tgz"
}
}

and then running npm install.

There is also a playground for this build and an npm module you can use via "typescript": "npm:@typescript-deploys/pr-build@6.0.0-pr-63067-4".;

Jake Bailey (jakebailey) · 2026-01-30T03:45:38Z

 computeValue: (compilerOptions): ModuleKind => {
 return typeof compilerOptions.module === "number" ?
 compilerOptions.module :
 _computedOptions.target.computeValue(compilerOptions) >= ScriptTarget.ES2015 ? ModuleKind.ES2015 : ModuleKind.CommonJS;


In a later PR, I will update this to set other ModuleKinds based on the target.

TypeScript Bot (typescript-bot) · 2026-01-30T04:08:14Z

Jake Bailey (@jakebailey) Here are the results of running the user tests with tsc comparing main and refs/pull/63067/merge:

There were infrastructure failures potentially unrelated to your change:

1 instance of "Package install failed"
1 instance of "Git clone failed"

Otherwise...

Something interesting changed - please have a look.

Details

acorn

/mnt/ts_downloads/_/m/acorn/tsconfig.json

[NEW] error TS1202: Import assignment cannot be used when targeting ECMAScript modules. Consider using 'import * as ns from "mod"', 'import {a} from "mod"', 'import d from "mod"', or another module format instead.
- /mnt/ts_downloads/_/m/acorn/index.ts(1,1)

adonis-framework

/mnt/ts_downloads/_/m/adonis-framework/tsconfig.json

[NEW] error TS1202: Import assignment cannot be used when targeting ECMAScript modules. Consider using 'import * as ns from "mod"', 'import {a} from "mod"', 'import d from "mod"', or another module format instead.
- /mnt/ts_downloads/_/m/adonis-framework/index.ts(1,1)

ajv

/mnt/ts_downloads/_/m/ajv/tsconfig.json

[NEW] error TS1202: Import assignment cannot be used when targeting ECMAScript modules. Consider using 'import * as ns from "mod"', 'import {a} from "mod"', 'import d from "mod"', or another module format instead.
- /mnt/ts_downloads/_/m/ajv/index.ts(1,1)

antd

/mnt/ts_downloads/_/m/antd/tsconfig.json

[NEW] error TS1202: Import assignment cannot be used when targeting ECMAScript modules. Consider using 'import * as ns from "mod"', 'import {a} from "mod"', 'import d from "mod"', or another module format instead.
- /mnt/ts_downloads/_/m/antd/index.ts(1,1)

assert

/mnt/ts_downloads/_/m/assert/tsconfig.json

[NEW] error TS1202: Import assignment cannot be used when targeting ECMAScript modules. Consider using 'import * as ns from "mod"', 'import {a} from "mod"', 'import d from "mod"', or another module format instead.
- /mnt/ts_downloads/_/m/assert/index.ts(1,1)

async

/mnt/ts_downloads/_/m/async/tsconfig.json

[NEW] error TS1202: Import assignment cannot be used when targeting ECMAScript modules. Consider using 'import * as ns from "mod"', 'import {a} from "mod"', 'import d from "mod"', or another module format instead.
- /mnt/ts_downloads/_/m/async/index.ts(1,1)

axios

/mnt/ts_downloads/_/m/axios/tsconfig.json

[NEW] error TS1202: Import assignment cannot be used when targeting ECMAScript modules. Consider using 'import * as ns from "mod"', 'import {a} from "mod"', 'import d from "mod"', or another module format instead.
- /mnt/ts_downloads/_/m/axios/index.ts(1,1)

bcryptjs

/mnt/ts_downloads/_/m/bcryptjs/tsconfig.json

[NEW] error TS1202: Import assignment cannot be used when targeting ECMAScript modules. Consider using 'import * as ns from "mod"', 'import {a} from "mod"', 'import d from "mod"', or another module format instead.
- /mnt/ts_downloads/_/m/bcryptjs/index.ts(1,1)

bignumber.js

/mnt/ts_downloads/_/m/bignumber.js/tsconfig.json

[NEW] error TS1202: Import assignment cannot be used when targeting ECMAScript modules. Consider using 'import * as ns from "mod"', 'import {a} from "mod"', 'import d from "mod"', or another module format instead.
- /mnt/ts_downloads/_/m/bignumber.js/index.ts(1,1)

bluebird

/mnt/ts_downloads/_/m/bluebird/tsconfig.json

[NEW] error TS1202: Import assignment cannot be used when targeting ECMAScript modules. Consider using 'import * as ns from "mod"', 'import {a} from "mod"', 'import d from "mod"', or another module format instead.
- /mnt/ts_downloads/_/m/bluebird/index.ts(1,1)

clear-require

/mnt/ts_downloads/_/m/clear-require/tsconfig.json

[NEW] error TS1202: Import assignment cannot be used when targeting ECMAScript modules. Consider using 'import * as ns from "mod"', 'import {a} from "mod"', 'import d from "mod"', or another module format instead.
- /mnt/ts_downloads/_/m/clear-require/index.ts(1,1)

clone

/mnt/ts_downloads/_/m/clone/tsconfig.json

[NEW] error TS1202: Import assignment cannot be used when targeting ECMAScript modules. Consider using 'import * as ns from "mod"', 'import {a} from "mod"', 'import d from "mod"', or another module format instead.
- /mnt/ts_downloads/_/m/clone/index.ts(1,1)

content-disposition

/mnt/ts_downloads/_/m/content-disposition/tsconfig.json

[NEW] error TS1202: Import assignment cannot be used when targeting ECMAScript modules. Consider using 'import * as ns from "mod"', 'import {a} from "mod"', 'import d from "mod"', or another module format instead.
- /mnt/ts_downloads/_/m/content-disposition/index.ts(1,1)

debug

/mnt/ts_downloads/_/m/debug/tsconfig.json

[NEW] error TS1202: Import assignment cannot be used when targeting ECMAScript modules. Consider using 'import * as ns from "mod"', 'import {a} from "mod"', 'import d from "mod"', or another module format instead.
- /mnt/ts_downloads/_/m/debug/index.ts(1,1)

discord.js

/mnt/ts_downloads/_/m/discord.js/tsconfig.json

[NEW] error TS1202: Import assignment cannot be used when targeting ECMAScript modules. Consider using 'import * as ns from "mod"', 'import {a} from "mod"', 'import d from "mod"', or another module format instead.
- /mnt/ts_downloads/_/m/discord.js/index.ts(1,1)

electron

/mnt/ts_downloads/_/m/electron/tsconfig.json

[NEW] error TS1202: Import assignment cannot be used when targeting ECMAScript modules. Consider using 'import * as ns from "mod"', 'import {a} from "mod"', 'import d from "mod"', or another module format instead.
- /mnt/ts_downloads/_/m/electron/index.ts(1,1)

eventemitter2

/mnt/ts_downloads/_/m/eventemitter2/tsconfig.json

[NEW] error TS1202: Import assignment cannot be used when targeting ECMAScript modules. Consider using 'import * as ns from "mod"', 'import {a} from "mod"', 'import d from "mod"', or another module format instead.
- /mnt/ts_downloads/_/m/eventemitter2/index.ts(1,1)

eventemitter3

/mnt/ts_downloads/_/m/eventemitter3/tsconfig.json

[NEW] error TS1202: Import assignment cannot be used when targeting ECMAScript modules. Consider using 'import * as ns from "mod"', 'import {a} from "mod"', 'import d from "mod"', or another module format instead.
- /mnt/ts_downloads/_/m/eventemitter3/index.ts(1,1)

firebase

/mnt/ts_downloads/_/m/firebase/tsconfig.json

[NEW] error TS1202: Import assignment cannot be used when targeting ECMAScript modules. Consider using 'import * as ns from "mod"', 'import {a} from "mod"', 'import d from "mod"', or another module format instead.
- /mnt/ts_downloads/_/m/firebase/index.ts(1,1)

follow-redirects

/mnt/ts_downloads/_/m/follow-redirects/tsconfig.json

[NEW] error TS1202: Import assignment cannot be used when targeting ECMAScript modules. Consider using 'import * as ns from "mod"', 'import {a} from "mod"', 'import d from "mod"', or another module format instead.
- /mnt/ts_downloads/_/m/follow-redirects/index.ts(1,1)

fp-ts

tsconfig.json

[NEW] error TS5107: Option 'target=ES5' is deprecated and will stop functioning in TypeScript 7.0. Specify compilerOption '"ignoreDeprecations": "6.0"' to silence this error.
- tsconfig.json#L5

tsconfig.build-es6.json

[NEW] error TS5107: Option 'target=ES5' is deprecated and will stop functioning in TypeScript 7.0. Specify compilerOption '"ignoreDeprecations": "6.0"' to silence this error.
- tsconfig.build-es6.json#L3

examples/tsconfig.json

[NEW] error TS5107: Option 'target=ES5' is deprecated and will stop functioning in TypeScript 7.0. Specify compilerOption '"ignoreDeprecations": "6.0"' to silence this error.
- examples/tsconfig.json#L3

dtslint/tsconfig.json

[NEW] error TS5107: Option 'target=ES5' is deprecated and will stop functioning in TypeScript 7.0. Specify compilerOption '"ignoreDeprecations": "6.0"' to silence this error.
- dtslint/tsconfig.json#L4

graceful-fs

/mnt/ts_downloads/_/m/graceful-fs/tsconfig.json

[NEW] error TS1202: Import assignment cannot be used when targeting ECMAScript modules. Consider using 'import * as ns from "mod"', 'import {a} from "mod"', 'import d from "mod"', or another module format instead.
- /mnt/ts_downloads/_/m/graceful-fs/index.ts(1,1)

immutable

/mnt/ts_downloads/_/m/immutable/tsconfig.json

[NEW] error TS1202: Import assignment cannot be used when targeting ECMAScript modules. Consider using 'import * as ns from "mod"', 'import {a} from "mod"', 'import d from "mod"', or another module format instead.
- /mnt/ts_downloads/_/m/immutable/index.ts(1,1)

isobject

/mnt/ts_downloads/_/m/isobject/tsconfig.json

[NEW] error TS1202: Import assignment cannot be used when targeting ECMAScript modules. Consider using 'import * as ns from "mod"', 'import {a} from "mod"', 'import d from "mod"', or another module format instead.
- /mnt/ts_downloads/_/m/isobject/index.ts(1,1)

jimp

/mnt/ts_downloads/_/m/jimp/tsconfig.json

[NEW] error TS1202: Import assignment cannot be used when targeting ECMAScript modules. Consider using 'import * as ns from "mod"', 'import {a} from "mod"', 'import d from "mod"', or another module format instead.
- /mnt/ts_downloads/_/m/jimp/index.ts(1,1)

jsonschema

/mnt/ts_downloads/_/m/jsonschema/tsconfig.json

[NEW] error TS1202: Import assignment cannot be used when targeting ECMAScript modules. Consider using 'import * as ns from "mod"', 'import {a} from "mod"', 'import d from "mod"', or another module format instead.
- /mnt/ts_downloads/_/m/jsonschema/index.ts(1,1)

keycode

/mnt/ts_downloads/_/m/keycode/tsconfig.json

[NEW] error TS1202: Import assignment cannot be used when targeting ECMAScript modules. Consider using 'import * as ns from "mod"', 'import {a} from "mod"', 'import d from "mod"', or another module format instead.
- /mnt/ts_downloads/_/m/keycode/index.ts(1,1)

localforage

/mnt/ts_downloads/_/m/localforage/tsconfig.json

[NEW] error TS1202: Import assignment cannot be used when targeting ECMAScript modules. Consider using 'import * as ns from "mod"', 'import {a} from "mod"', 'import d from "mod"', or another module format instead.
- /mnt/ts_downloads/_/m/localforage/index.ts(1,1)

lodash

/mnt/ts_downloads/_/m/lodash/tsconfig.json

[NEW] error TS1202: Import assignment cannot be used when targeting ECMAScript modules. Consider using 'import * as ns from "mod"', 'import {a} from "mod"', 'import d from "mod"', or another module format instead.
- /mnt/ts_downloads/_/m/lodash/index.ts(1,1)

log4js

/mnt/ts_downloads/_/m/log4js/tsconfig.json

[NEW] error TS1202: Import assignment cannot be used when targeting ECMAScript modules. Consider using 'import * as ns from "mod"', 'import {a} from "mod"', 'import d from "mod"', or another module format instead.
- /mnt/ts_downloads/_/m/log4js/index.ts(1,1)

minimatch

/mnt/ts_downloads/_/m/minimatch/tsconfig.json

[NEW] error TS1202: Import assignment cannot be used when targeting ECMAScript modules. Consider using 'import * as ns from "mod"', 'import {a} from "mod"', 'import d from "mod"', or another module format instead.
- /mnt/ts_downloads/_/m/minimatch/index.ts(1,1)

mobx

/mnt/ts_downloads/_/m/mobx/tsconfig.json

[NEW] error TS1202: Import assignment cannot be used when targeting ECMAScript modules. Consider using 'import * as ns from "mod"', 'import {a} from "mod"', 'import d from "mod"', or another module format instead.
- /mnt/ts_downloads/_/m/mobx/index.ts(1,1)

moment

/mnt/ts_downloads/_/m/moment/tsconfig.json

[NEW] error TS1202: Import assignment cannot be used when targeting ECMAScript modules. Consider using 'import * as ns from "mod"', 'import {a} from "mod"', 'import d from "mod"', or another module format instead.
- /mnt/ts_downloads/_/m/moment/index.ts(1,1)

mqtt

/mnt/ts_downloads/_/m/mqtt/tsconfig.json

[NEW] error TS1202: Import assignment cannot be used when targeting ECMAScript modules. Consider using 'import * as ns from "mod"', 'import {a} from "mod"', 'import d from "mod"', or another module format instead.
- /mnt/ts_downloads/_/m/mqtt/index.ts(1,1)

npmlog

/mnt/ts_downloads/_/m/npmlog/tsconfig.json

[NEW] error TS1202: Import assignment cannot be used when targeting ECMAScript modules. Consider using 'import * as ns from "mod"', 'import {a} from "mod"', 'import d from "mod"', or another module format instead.
- /mnt/ts_downloads/_/m/npmlog/index.ts(1,1)

octokit-rest

/mnt/ts_downloads/_/m/octokit-rest/tsconfig.json

[NEW] error TS1202: Import assignment cannot be used when targeting ECMAScript modules. Consider using 'import * as ns from "mod"', 'import {a} from "mod"', 'import d from "mod"', or another module format instead.
- /mnt/ts_downloads/_/m/octokit-rest/index.ts(1,1)

portfinder

/mnt/ts_downloads/_/m/portfinder/tsconfig.json

[NEW] error TS1202: Import assignment cannot be used when targeting ECMAScript modules. Consider using 'import * as ns from "mod"', 'import {a} from "mod"', 'import d from "mod"', or another module format instead.
- /mnt/ts_downloads/_/m/portfinder/index.ts(1,1)

protobufjs

/mnt/ts_downloads/_/m/protobufjs/tsconfig.json

[NEW] error TS1202: Import assignment cannot be used when targeting ECMAScript modules. Consider using 'import * as ns from "mod"', 'import {a} from "mod"', 'import d from "mod"', or another module format instead.
- /mnt/ts_downloads/_/m/protobufjs/index.ts(1,1)

redux

/mnt/ts_downloads/_/m/redux/tsconfig.json

[NEW] error TS1202: Import assignment cannot be used when targeting ECMAScript modules. Consider using 'import * as ns from "mod"', 'import {a} from "mod"', 'import d from "mod"', or another module format instead.
- /mnt/ts_downloads/_/m/redux/index.ts(1,1)

reselect

/mnt/ts_downloads/_/m/reselect/tsconfig.json

[NEW] error TS1202: Import assignment cannot be used when targeting ECMAScript modules. Consider using 'import * as ns from "mod"', 'import {a} from "mod"', 'import d from "mod"', or another module format instead.
- /mnt/ts_downloads/_/m/reselect/index.ts(1,1)

rxjs

/mnt/ts_downloads/_/m/rxjs/tsconfig.json

[NEW] error TS1202: Import assignment cannot be used when targeting ECMAScript modules. Consider using 'import * as ns from "mod"', 'import {a} from "mod"', 'import d from "mod"', or another module format instead.
- /mnt/ts_downloads/_/m/rxjs/index.ts(1,1)

should

/mnt/ts_downloads/_/m/should/tsconfig.json

[NEW] error TS1202: Import assignment cannot be used when targeting ECMAScript modules. Consider using 'import * as ns from "mod"', 'import {a} from "mod"', 'import d from "mod"', or another module format instead.
- /mnt/ts_downloads/_/m/should/index.ts(1,1)

sift

/mnt/ts_downloads/_/m/sift/tsconfig.json

[NEW] error TS1202: Import assignment cannot be used when targeting ECMAScript modules. Consider using 'import * as ns from "mod"', 'import {a} from "mod"', 'import d from "mod"', or another module format instead.
- /mnt/ts_downloads/_/m/sift/index.ts(1,1)

soap

/mnt/ts_downloads/_/m/soap/tsconfig.json

[NEW] error TS1202: Import assignment cannot be used when targeting ECMAScript modules. Consider using 'import * as ns from "mod"', 'import {a} from "mod"', 'import d from "mod"', or another module format instead.
- /mnt/ts_downloads/_/m/soap/index.ts(1,1)

sugar

/mnt/ts_downloads/_/m/sugar/tsconfig.json

[NEW] error TS1202: Import assignment cannot be used when targeting ECMAScript modules. Consider using 'import * as ns from "mod"', 'import {a} from "mod"', 'import d from "mod"', or another module format instead.
- /mnt/ts_downloads/_/m/sugar/index.ts(1,1)

tslint

/mnt/ts_downloads/_/m/tslint/tsconfig.json

[NEW] error TS1202: Import assignment cannot be used when targeting ECMAScript modules. Consider using 'import * as ns from "mod"', 'import {a} from "mod"', 'import d from "mod"', or another module format instead.
- /mnt/ts_downloads/_/m/tslint/index.ts(1,1)

uglify-js

/mnt/ts_downloads/_/m/uglify-js/tsconfig.json

[NEW] error TS1202: Import assignment cannot be used when targeting ECMAScript modules. Consider using 'import * as ns from "mod"', 'import {a} from "mod"', 'import d from "mod"', or another module format instead.
- /mnt/ts_downloads/_/m/uglify-js/index.ts(1,1)

url-search-params

/mnt/ts_downloads/_/m/url-search-params/tsconfig.json

[NEW] error TS1202: Import assignment cannot be used when targeting ECMAScript modules. Consider using 'import * as ns from "mod"', 'import {a} from "mod"', 'import d from "mod"', or another module format instead.
- /mnt/ts_downloads/_/m/url-search-params/index.ts(1,1)

util

/mnt/ts_downloads/_/m/util/tsconfig.json

[NEW] error TS1202: Import assignment cannot be used when targeting ECMAScript modules. Consider using 'import * as ns from "mod"', 'import {a} from "mod"', 'import d from "mod"', or another module format instead.
- /mnt/ts_downloads/_/m/util/index.ts(1,1)

vue

/mnt/ts_downloads/_/m/vue/tsconfig.json

[NEW] error TS1202: Import assignment cannot be used when targeting ECMAScript modules. Consider using 'import * as ns from "mod"', 'import {a} from "mod"', 'import d from "mod"', or another module format instead.
- /mnt/ts_downloads/_/m/vue/index.ts(1,1)

vuex

/mnt/ts_downloads/_/m/vuex/tsconfig.json

[NEW] error TS1202: Import assignment cannot be used when targeting ECMAScript modules. Consider using 'import * as ns from "mod"', 'import {a} from "mod"', 'import d from "mod"', or another module format instead.
- /mnt/ts_downloads/_/m/vuex/index.ts(1,1)

webpack

tsconfig.hot.json

[NEW] error TS5107: Option 'target=ES5' is deprecated and will stop functioning in TypeScript 7.0. Specify compilerOption '"ignoreDeprecations": "6.0"' to silence this error.
- tsconfig.hot.json#L3

xlsx

/mnt/ts_downloads/_/m/xlsx/tsconfig.json

[NEW] error TS1202: Import assignment cannot be used when targeting ECMAScript modules. Consider using 'import * as ns from "mod"', 'import {a} from "mod"', 'import d from "mod"', or another module format instead.
- /mnt/ts_downloads/_/m/xlsx/index.ts(1,1)

xpath

/mnt/ts_downloads/_/m/xpath/tsconfig.json

[NEW] error TS1202: Import assignment cannot be used when targeting ECMAScript modules. Consider using 'import * as ns from "mod"', 'import {a} from "mod"', 'import d from "mod"', or another module format instead.
- /mnt/ts_downloads/_/m/xpath/index.ts(1,1)

TypeScript Bot (typescript-bot) · 2026-01-30T05:01:42Z

Jake Bailey (@jakebailey) Here are the results of running the top 400 repos with tsc comparing main and refs/pull/63067/merge:

Something interesting changed - please have a look.

Details

apitable/apitable

14 of 15 projects failed to build with the old tsc and were ignored

packages/databus-client/tsconfig.json

error TS5107: Option 'target=ES5' is deprecated and will stop functioning in TypeScript 7.0. Specify compilerOption '"ignoreDeprecations": "6.0"' to silence this error.
- packages/databus-client/tsconfig.json#L4

basarat/typescript-book

10 of 15 projects failed to build with the old tsc and were ignored

code/async-await/es5/tsconfig.json

error TS5107: Option 'target=ES5' is deprecated and will stop functioning in TypeScript 7.0. Specify compilerOption '"ignoreDeprecations": "6.0"' to silence this error.
- code/async-await/es5/tsconfig.json#L3

compiler-explorer/compiler-explorer

4 of 7 projects failed to build with the old tsc and were ignored

tsconfig.frontend.tests.json

error TS5107: Option 'target=ES5' is deprecated and will stop functioning in TypeScript 7.0. Specify compilerOption '"ignoreDeprecations": "6.0"' to silence this error.
- Project Scope

faker-js/faker

1 of 2 projects failed to build with the old tsc and were ignored

cypress/tsconfig.json

error TS5107: Option 'target=ES5' is deprecated and will stop functioning in TypeScript 7.0. Specify compilerOption '"ignoreDeprecations": "6.0"' to silence this error.
- cypress/tsconfig.json#L3

radix-ui/primitives

64 of 68 projects failed to build with the old tsc and were ignored

cypress/tsconfig.json

error TS5107: Option 'target=ES5' is deprecated and will stop functioning in TypeScript 7.0. Specify compilerOption '"ignoreDeprecations": "6.0"' to silence this error.
- cypress/tsconfig.json#L3

Ryan Cavanaugh (RyanCavanaugh)

Overall LGTM, I am OK with any proposed name for the "current" target version

Jake Bailey (jakebailey) · 2026-01-31T01:23:26Z

TypeScript Bot (@typescript-bot) run dt

TypeScript Bot (typescript-bot) · 2026-01-31T01:23:30Z

Starting jobs; this comment will be updated as builds start and complete.

Command	Status	Results
`run dt`	✅ Started	✅ Results

Daniel Rosenwasser (DanielRosenwasser) · 2026-01-31T01:22:24Z

 );
 const reportDiagnostic = ts.createDiagnosticReporter(system);
- const parsedConfig = ts.parseConfigFileWithSystem("tsconfig.json", {}, /*extendedConfigCache*/ undefined, /*watchOptionsToExtend*/ undefined, system, reportDiagnostic)!;
+ const parsedConfig = ts.parseConfigFileWithSystem("tsconfig.json", { target: ts.ScriptTarget.ES5, module: ts.ModuleKind.AMD }, /*extendedConfigCache*/ undefined, /*watchOptionsToExtend*/ undefined, system, reportDiagnostic)!;


I see you're still using ES5 here - are you just doing this to avoid churning baselines?

Ryan asked me about this one too. Yes, this is to avoid churning baselines.

Daniel Rosenwasser (DanielRosenwasser) · 2026-01-31T01:22:55Z

 compilerOptions: {
 incremental: true,
- target: "es5",
+ target: "es2015",


But so why is this one ES2015?

I changed most tests that broke to es2015 first, and then flipped things back. In this case I'm sure I did it to avoid a deprecation error that messes up the incremental test.

TypeScript Bot (typescript-bot) · 2026-01-31T01:45:00Z

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Jake Bailey (jakebailey) commented Jan 30, 2026
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Jake Bailey (jakebailey) mentioned this pull request Jan 30, 2026
Change all target=es5 to target=es6 DefinitelyTyped/DefinitelyTyped#74421
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Ryan Cavanaugh (RyanCavanaugh) previously requested changes Jan 30, 2026
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Jake Bailey (jakebailey) mentioned this pull request Jan 30, 2026
Be more lenient about iteration when lib=es5 / noLib#63070
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Jake Bailey (jakebailey)force-pushed the es-current-year branch from d912f0e to 4f65b2bCompare January 30, 2026 22:02

Jake Bailey (jakebailey) changed the title ~~Default target to "current year", deprecate ES5~~Default target to "latest standard", deprecate ES5Jan 30, 2026

Jake Bailey (jakebailey) added 2 commits January 30, 2026 14:55

dtsBundler target
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Force ES5 in convertToAsyncFunction tests
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Jake Bailey (jakebailey) requested a review from Ryan Cavanaugh (RyanCavanaugh)January 31, 2026 00:31

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Jake Bailey (jakebailey) mentioned this pull request Jan 31, 2026
Try and fix react ModernComponent test for TS 6.0, take 2 DefinitelyTyped/DefinitelyTyped#74431
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Daniel Rosenwasser (DanielRosenwasser) reviewed Jan 31, 2026
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Jake Bailey (jakebailey) requested a review from Daniel Rosenwasser (DanielRosenwasser)January 31, 2026 01:55

Daniel Rosenwasser (DanielRosenwasser) approved these changes Jan 31, 2026
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Jake Bailey (jakebailey) added the Breaking Change Would introduce errors in existing code label Jan 31, 2026

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Merged via the queue into microsoft:main with commit 95e3aaaJan 31, 2026
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Jake Bailey (jakebailey) deleted the es-current-year branch January 31, 2026 05:22

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Jake Bailey (jakebailey) mentioned this pull request Jan 31, 2026
Remove ES5 references, misc cleanup #63075
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Jake Bailey (jakebailey) mentioned this pull request Feb 14, 2026
Error on ES5, fix skipped tests microsoft/typescript-go#2787
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Nato Boram (NatoBoram) mentioned this pull request Feb 26, 2026
♻️ Modernize client NatoBoram/gigachads.ts#76
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Matt Kantor (mkantor) mentioned this pull request Apr 1, 2026
[V6] module defaults is not esnext#63330
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Levyn (ly-schneider) mentioned this pull request Apr 15, 2026
chore(deps-dev): bump typescript from 5.9.3 to 6.0.2 in /bfs-docs ly-schneider/bless2n-food-system#316
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Richard (Shoonkey) mentioned this pull request May 3, 2026
dtslint Github workflow is currently broken emotion-js/emotion#3375
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coderabbitaiBot mentioned this pull request Jul 6, 2026
chore(deps): update all non-major dependencies niklhut/libroo-website#72
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Jon Koops (jonkoops) mentioned this pull request Jul 9, 2026
Update module default value in tsconfigRules microsoft/TypeScript-Website#3608
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TypeScript Bot (typescript-bot) commented Jan 30, 2026

/mnt/ts_downloads/_/m/acorn/tsconfig.json

/mnt/ts_downloads/_/m/adonis-framework/tsconfig.json

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/mnt/ts_downloads/_/m/bluebird/tsconfig.json

/mnt/ts_downloads/_/m/clear-require/tsconfig.json

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/mnt/ts_downloads/_/m/content-disposition/tsconfig.json

/mnt/ts_downloads/_/m/debug/tsconfig.json

/mnt/ts_downloads/_/m/discord.js/tsconfig.json

/mnt/ts_downloads/_/m/electron/tsconfig.json

/mnt/ts_downloads/_/m/eventemitter2/tsconfig.json

/mnt/ts_downloads/_/m/eventemitter3/tsconfig.json

/mnt/ts_downloads/_/m/firebase/tsconfig.json

/mnt/ts_downloads/_/m/follow-redirects/tsconfig.json

/mnt/ts_downloads/_/m/graceful-fs/tsconfig.json

/mnt/ts_downloads/_/m/immutable/tsconfig.json

/mnt/ts_downloads/_/m/isobject/tsconfig.json

/mnt/ts_downloads/_/m/jimp/tsconfig.json

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/mnt/ts_downloads/_/m/localforage/tsconfig.json

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/mnt/ts_downloads/_/m/minimatch/tsconfig.json

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/mnt/ts_downloads/_/m/moment/tsconfig.json

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/mnt/ts_downloads/_/m/rxjs/tsconfig.json

/mnt/ts_downloads/_/m/should/tsconfig.json

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/mnt/ts_downloads/_/m/soap/tsconfig.json

/mnt/ts_downloads/_/m/sugar/tsconfig.json

/mnt/ts_downloads/_/m/tslint/tsconfig.json

/mnt/ts_downloads/_/m/uglify-js/tsconfig.json

/mnt/ts_downloads/_/m/url-search-params/tsconfig.json

/mnt/ts_downloads/_/m/util/tsconfig.json

/mnt/ts_downloads/_/m/vue/tsconfig.json

/mnt/ts_downloads/_/m/vuex/tsconfig.json

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