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feat: add ESM output format to shared libs and server SDKs #1200

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feat: add ESM output format to shared libs and server SDKs #1200

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b151e86
Cursor: Apply local changes for cloud agent
jonathannorris Dec 31, 2025
1ef9f51
feat: Add ESM support and update package exports
cursoragent Dec 31, 2025
be512a6
Refactor: Remove ESM from bucketing-test-data build
cursoragent Jan 2, 2026
59276a7
fix: correct ESM export paths and bundle lodash in bucketing
jonathannorris Jan 2, 2026
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9 changes: 8 additions & 1 deletion dev-apps/js/webpack.config.js
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Original file line number Diff line number Diff line change
@@ -1,3 +1,10 @@
const { composePlugins, withNx, withWeb } = require('@nx/webpack')

module.exports = composePlugins(withNx(), withWeb(), (config) => config)
module.exports = composePlugins(withNx(), withWeb(), (config) => {
config.resolve.extensionAlias = {
'.js': ['.ts', '.js'],
'.mjs': ['.mts', '.mjs'],
'.cjs': ['.cts', '.cjs'],
}
return config
})
12 changes: 10 additions & 2 deletions lib/shared/bucketing/package.json
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Expand Up @@ -8,8 +8,16 @@
"murmurhash": "^2.0.1",
"ua-parser-js": "^1.0.40"
},
"types": "src/index.d.ts",
"main": "src/index.js",
"main": "./index.cjs",
"module": "./index.js",
"types": "./src/index.d.ts",
"exports": {
".": {
"types": "./src/index.d.ts",
"import": "./index.js",
"require": "./index.cjs"
}
},
"repository": {
"type": "git",
"url": "git://github.com/DevCycleHQ/js-sdks.git"
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9 changes: 3 additions & 6 deletions lib/shared/bucketing/project.json
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Expand Up @@ -26,9 +26,10 @@
"outputPath": "dist/lib/shared/bucketing",
"main": "lib/shared/bucketing/src/index.ts",
"tsConfig": "lib/shared/bucketing/tsconfig.lib.json",
"format": ["cjs"],
"format": ["cjs", "esm"],
"platform": "node",
"bundle": true,
"thirdParty": true,
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Copilot AI Jan 9, 2026

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The thirdParty: true option was added, and lodash was removed from the external array. This will cause lodash to be bundled into the output. However, lodash is still listed as a dependency in package.json. Consider either: 1) keeping lodash in the external array if consumers should provide it, or 2) removing it from package.json dependencies if it's being bundled. Bundling lodash while keeping it as a dependency creates ambiguity about whether consumers need to install it separately.

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"declaration": true,
"sourcemap": true,
"assets": [
Expand All @@ -37,13 +38,9 @@
],
"external": [
"@devcycle/types",
"lodash",
"murmurhash",
"ua-parser-js"
],
"esbuildOptions": {
"outExtension": { ".js": ".js" }
}
]
}
},
"lint": {
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12 changes: 10 additions & 2 deletions lib/shared/config-manager/package.json
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Expand Up @@ -2,8 +2,16 @@
"name": "@devcycle/config-manager",
"version": "1.0.0",
"license": "MIT",
"main": "src/index.js",
"types": "src/index.d.ts",
"main": "./index.cjs",
"module": "./index.js",
"types": "./src/index.d.ts",
"exports": {
".": {
"types": "./src/index.d.ts",
"import": "./index.js",
"require": "./index.cjs"
}
},
"repository": {
"type": "git",
"url": "git://github.com/DevCycleHQ/js-sdks.git"
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7 changes: 2 additions & 5 deletions lib/shared/config-manager/project.json
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Expand Up @@ -11,7 +11,7 @@
"outputPath": "dist/lib/shared/config-manager",
"main": "lib/shared/config-manager/src/index.ts",
"tsConfig": "lib/shared/config-manager/tsconfig.lib.json",
"format": ["cjs"],
"format": ["cjs", "esm"],
"platform": "node",
"bundle": true,
"declaration": true,
Expand All @@ -25,10 +25,7 @@
"cross-fetch",
"fetch-retry",
"eventsource"
],
"esbuildOptions": {
"outExtension": { ".js": ".js" }
}
]
}
},
"lint": {
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12 changes: 10 additions & 2 deletions lib/shared/server-request/package.json
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Expand Up @@ -2,8 +2,16 @@
"name": "@devcycle/server-request",
"version": "1.0.0",
"license": "MIT",
"main": "src/index.js",
"types": "src/index.d.ts",
"main": "./index.cjs",
"module": "./index.js",
"types": "./src/index.d.ts",
"exports": {
".": {
"types": "./src/index.d.ts",
"import": "./index.js",
"require": "./index.cjs"
}
},
"repository": {
"type": "git",
"url": "git://github.com/DevCycleHQ/js-sdks.git"
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7 changes: 2 additions & 5 deletions lib/shared/server-request/project.json
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Expand Up @@ -11,7 +11,7 @@
"outputPath": "dist/lib/shared/server-request",
"main": "lib/shared/server-request/src/index.ts",
"tsConfig": "lib/shared/server-request/tsconfig.lib.json",
"format": ["cjs"],
"format": ["cjs", "esm"],
"platform": "node",
"bundle": true,
"declaration": true,
Expand All @@ -20,10 +20,7 @@
"lib/shared/server-request/*.md",
"lib/shared/server-request/package.json"
],
"external": ["cross-fetch", "fetch-retry"],
"esbuildOptions": {
"outExtension": { ".js": ".js" }
}
"external": ["cross-fetch", "fetch-retry"]
}
},
"lint": {
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12 changes: 10 additions & 2 deletions lib/shared/sse-connection/package.json
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Expand Up @@ -5,8 +5,16 @@
"dependencies": {
"eventsource": "^2.0.2"
},
"types": "src/index.d.ts",
"main": "src/index.js",
"main": "./index.cjs",
"module": "./index.js",
"types": "./src/index.d.ts",
"exports": {
".": {
"types": "./src/index.d.ts",
"import": "./index.js",
"require": "./index.cjs"
}
},
"repository": {
"type": "git",
"url": "git://github.com/DevCycleHQ/js-sdks.git"
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7 changes: 2 additions & 5 deletions lib/shared/sse-connection/project.json
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Expand Up @@ -11,7 +11,7 @@
"outputPath": "dist/lib/shared/sse-connection",
"main": "lib/shared/sse-connection/src/index.ts",
"tsConfig": "lib/shared/sse-connection/tsconfig.lib.json",
"format": ["cjs"],
"format": ["cjs", "esm"],
"platform": "node",
"bundle": true,
"declaration": true,
Expand All @@ -20,10 +20,7 @@
"lib/shared/sse-connection/*.md",
"lib/shared/sse-connection/package.json"
],
"external": ["@devcycle/types", "eventsource"],
"esbuildOptions": {
"outExtension": { ".js": ".js" }
}
"external": ["@devcycle/types", "eventsource"]
}
},
"lint": {
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13 changes: 10 additions & 3 deletions lib/shared/vercel-edge-config/package.json
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Expand Up @@ -8,9 +8,16 @@
"dependencies": {
"class-transformer": "^0.5.1"
},
"type": "commonjs",
"main": "./src/index.js",
"typings": "./src/index.d.ts",
"main": "./index.cjs",
"module": "./index.js",
"types": "./src/index.d.ts",
"exports": {
".": {
"types": "./src/index.d.ts",
"import": "./index.js",
"require": "./index.cjs"
}
},
"repository": {
"type": "git",
"url": "git://github.com/DevCycleHQ/js-sdks.git"
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7 changes: 2 additions & 5 deletions lib/shared/vercel-edge-config/project.json
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Expand Up @@ -11,7 +11,7 @@
"outputPath": "dist/lib/shared/vercel-edge-config",
"main": "lib/shared/vercel-edge-config/src/index.ts",
"tsConfig": "lib/shared/vercel-edge-config/tsconfig.lib.json",
"format": ["cjs"],
"format": ["cjs", "esm"],
"platform": "node",
"bundle": true,
"declaration": true,
Expand All @@ -24,10 +24,7 @@
"@devcycle/types",
"@vercel/edge-config",
"class-transformer"
],
"esbuildOptions": {
"outExtension": { ".js": ".js" }
}
]
}
},
"lint": {
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12 changes: 10 additions & 2 deletions sdk/js-cloud-server/package.json
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Expand Up @@ -24,6 +24,14 @@
"fetch-retry": "^5.0.6",
"lodash": "^4.17.21"
},
"main": "index.js",
"types": "src/index.d.ts"
"main": "./index.cjs",
"module": "./index.js",
"types": "./src/index.d.ts",
"exports": {
".": {
"types": "./src/index.d.ts",
"import": "./index.js",
"require": "./index.cjs"
}
}
}
9 changes: 2 additions & 7 deletions sdk/js-cloud-server/project.json
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Expand Up @@ -46,7 +46,7 @@
"outputPath": "dist/sdk/js-cloud-server",
"tsConfig": "sdk/js-cloud-server/tsconfig.lib.json",
"main": "sdk/js-cloud-server/src/index.ts",
"format": ["cjs"],
"format": ["cjs", "esm"],
"platform": "node",
"bundle": true,
"declaration": true,
Expand All @@ -60,12 +60,7 @@
"cross-fetch",
"fetch-retry",
"lodash"
],
"esbuildOptions": {
"outExtension": {
".js": ".js"
}
}
]
}
},
"npm-publish": {
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12 changes: 10 additions & 2 deletions sdk/nestjs/package.json
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Expand Up @@ -30,6 +30,14 @@
"engines": {
"node": ">=16.0.0"
},
"main": "index.js",
"types": "src/index.d.ts"
"main": "./index.cjs",
"module": "./index.js",
"types": "./src/index.d.ts",
"exports": {
".": {
"types": "./src/index.d.ts",
"import": "./index.js",
"require": "./index.cjs"
}
}
}
7 changes: 2 additions & 5 deletions sdk/nestjs/project.json
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Expand Up @@ -41,7 +41,7 @@
"outputPath": "dist/sdk/nestjs",
"tsConfig": "sdk/nestjs/tsconfig.lib.json",
"main": "sdk/nestjs/src/index.ts",
"format": ["cjs"],
"format": ["cjs", "esm"],
"platform": "node",
"bundle": true,
"declaration": true,
Expand All @@ -52,10 +52,7 @@
"@devcycle/types",
"nestjs-cls",
"@nestjs/*"
],
"esbuildOptions": {
"outExtension": { ".js": ".js" }
}
]
}
},
"npm-publish": {
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13 changes: 7 additions & 6 deletions sdk/nodejs/package.json
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Expand Up @@ -44,18 +44,19 @@
"engines": {
"node": ">=16.0.0"
},
"main": "src/index.js",
"types": "src/index.d.ts",
"main": "./src/index.cjs",
"module": "./src/index.js",
"types": "./src/index.d.ts",
"exports": {
".": {
"types": "./src/index.d.ts",
"import": "./src/index.js",
"require": "./src/index.js",
"types": "./src/index.d.ts"
"require": "./src/index.cjs"
},
"./openfeature-strategy": {
"types": "./openfeature-strategy.d.ts",
"import": "./openfeature-strategy.js",
"require": "./openfeature-strategy.js",
"types": "./openfeature-strategy.d.ts"
"require": "./openfeature-strategy.cjs"
}
}
}
9 changes: 2 additions & 7 deletions sdk/nodejs/project.json
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Expand Up @@ -49,7 +49,7 @@
"tsConfig": "sdk/nodejs/tsconfig.lib.json",
"main": "sdk/nodejs/src/index.ts",
"additionalEntryPoints": ["sdk/nodejs/openfeature-strategy.ts"],
"format": ["cjs"],
"format": ["cjs", "esm"],
"platform": "node",
"bundle": true,
"declaration": true,
Expand All @@ -64,12 +64,7 @@
"cross-fetch",
"eventsource",
"fetch-retry"
],
"esbuildOptions": {
"outExtension": {
".js": ".js"
}
}
]
}
},
"npm-publish": {
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11 changes: 7 additions & 4 deletions sdk/openfeature-angular-provider/package.json
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Expand Up @@ -32,16 +32,19 @@
"optional": true
}
},
"main": "./src/index.cjs",
"module": "./src/index.js",
"types": "./src/index.d.ts",
"exports": {
".": {
"types": "./src/index.d.ts",
"import": "./src/index.js",
"require": "./src/index.js",
"types": "./src/index.d.ts"
"require": "./src/index.cjs"
},
"./strategy": {
"types": "./strategy.d.ts",
"import": "./strategy.js",
"require": "./strategy.js",
"types": "./strategy.d.ts"
"require": "./strategy.cjs"
}
}
}
7 changes: 2 additions & 5 deletions sdk/openfeature-angular-provider/project.json
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Expand Up @@ -13,7 +13,7 @@
"additionalEntryPoints": [
"sdk/openfeature-angular-provider/strategy.ts"
],
"format": ["cjs"],
"format": ["cjs", "esm"],
"platform": "browser",
"bundle": true,
"declaration": true,
Expand All @@ -26,10 +26,7 @@
"@devcycle/js-client-sdk",
"@devcycle/openfeature-web-provider",
"@openfeature/*"
],
"esbuildOptions": {
"outExtension": { ".js": ".js" }
}
]
}
},
"lint": {
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