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breaking change!: only ship ESM (and drop Node 18) #264

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Merged
dimitropoulos merged 3 commits into from
Aug 27, 2025
+6 −10
Merged

breaking change!: only ship ESM (and drop Node 18) #264

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8d5e97e
remove node 18 support
dimitropoulos Aug 27, 2025
46a71ae
only ship esm
dimitropoulos Aug 27, 2025
b1bbfb8
remove `main` field
dimitropoulos Aug 27, 2025
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2 changes: 1 addition & 1 deletion .github/workflows/test.yml
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Original file line number Diff line number Diff line change
Expand Up @@ -13,7 +13,7 @@ jobs:
strategy:
fail-fast: false
matrix:
node: [18, 20, 22, 24]
node: [20, 22, 24]
task: [test:nodejs, test:edge]

steps:
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12 changes: 4 additions & 8 deletions package.json
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Original file line number Diff line number Diff line change
Expand Up @@ -6,25 +6,21 @@
"type": "git",
"url": "git+https://github.com/vercel/ms.git"
},
"main": "./dist/index.cjs",
"types": "./dist/index.d.cts",
"types": "./dist/index.d.ts",
"type": "module",
"exports": {
".": {
"import": {
"types": "./dist/index.d.ts",
"default": "./dist/index.js"
},
"require": {
"types": "./dist/index.d.cts",
"default": "./dist/index.cjs"
}
"default": "./dist/index.js"
}
},
"sideEffects": false,
"license": "MIT",
"engines": {
"node": ">=18"
"node": ">=20"
},
"packageManager": "pnpm@10.14.0-0+sha512.2cd47a0cbf5f1d1de7693a88307a0ede5be94e0d3b34853d800ee775efbea0650cb562b77605ec80bc8d925f5cd27c4dfe8bb04d3a0b76090784c664450d32d6",
"files": [
Expand All @@ -38,7 +34,7 @@
"lint": "biome lint",
"format": "biome format",
"typecheck": "tsc --noEmit",
"attw": "pnpm build && attw --pack .",
"attw": "pnpm build && attw --pack --profile esm-only .",
"precommit": "lint-staged",
"prepare": "husky"
},
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2 changes: 1 addition & 1 deletion tsdown.config.ts
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Expand Up @@ -2,7 +2,7 @@ import { defineConfig } from 'tsdown';

export default defineConfig({
entry: ['src/index.ts'],
format: ['cjs', 'esm'],
format: ['esm'],
dts: true,
sourcemap: true,
clean: true,
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