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

[jonathannorris]

Summary

Adds dual ESM/CJS output format to shared libraries and server SDKs.

Changes

• Add format: ["cjs", "esm"] to esbuild configs
• Update package.json exports with proper conditional exports (import/require)
• Use .cjs extension for CommonJS, .js for ESM
• Add webpack extensionAlias config for dev-apps

Packages Updated

• @devcycle/bucketing, @devcycle/config-manager, @devcycle/server-request, @devcycle/sse-connection, @devcycle/vercel-edge-config
• @devcycle/js-cloud-server-sdk, @devcycle/nestjs-server-sdk, @devcycle/nodejs-server-sdk
• @devcycle/openfeature-web-provider, @devcycle/openfeature-react-provider, @devcycle/openfeature-angular-provider, @devcycle/openfeature-nestjs-provider

[vercel]

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Project	Deployment	Review	Updated (UTC)
js-sdks-web-elements	Ready	Preview, Comment	Jan 9, 2026 4:28pm
js-sdks-with-provider	Ready	Preview, Comment	Jan 9, 2026 4:28pm

1 Skipped Deployment

Project	Deployment	Review	Updated (UTC)
js-sdks-next-js-page-router	Ignored		Jan 9, 2026 4:28pm

[Copilot]

Pull request overview

This PR adds dual ESM/CJS output format support to shared libraries and server SDKs, enabling better compatibility with both module systems. The changes standardize the build configuration across multiple packages by using .cjs extensions for CommonJS output and .js for ESM output, with proper conditional exports in package.json files.

• Configures esbuild to generate both ESM and CJS formats for all affected packages
• Updates package.json files with proper main, module, and conditional exports fields
• Removes explicit outExtension configuration to use esbuild defaults

Reviewed changes

Copilot reviewed 25 out of 25 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
sdk/openfeature-web-provider/project.json	Adds ESM format output and removes outExtension override
sdk/openfeature-web-provider/package.json	Updates exports with dual format entry points using .cjs/.js extensions
sdk/openfeature-react-provider/project.json	Adds ESM format output and removes outExtension override
sdk/openfeature-react-provider/package.json	Updates exports with dual format entry points using .cjs/.js extensions
sdk/openfeature-nestjs-provider/project.json	Adds ESM format output and removes outExtension override
sdk/openfeature-nestjs-provider/package.json	Updates exports with dual format entry points using .cjs/.js extensions
sdk/openfeature-angular-provider/project.json	Adds ESM format output and removes outExtension override
sdk/openfeature-angular-provider/package.json	Updates exports with dual format entry points using .cjs/.js extensions
sdk/nodejs/project.json	Adds ESM format output and removes outExtension override
sdk/nodejs/package.json	Updates exports with dual format entry points using .cjs/.js extensions
sdk/nestjs/project.json	Adds ESM format output and removes outExtension override
sdk/nestjs/package.json	Updates exports with dual format entry points using .cjs/.js extensions
sdk/js-cloud-server/project.json	Adds ESM format output and removes outExtension override
sdk/js-cloud-server/package.json	Updates exports with dual format entry points using .cjs/.js extensions
lib/shared/vercel-edge-config/project.json	Adds ESM format output and removes outExtension override
lib/shared/vercel-edge-config/package.json	Updates exports with dual format entry points, removes type field
lib/shared/sse-connection/project.json	Adds ESM format output and removes outExtension override
lib/shared/sse-connection/package.json	Updates exports with dual format entry points using .cjs/.js extensions
lib/shared/server-request/project.json	Adds ESM format output and removes outExtension override
lib/shared/server-request/package.json	Updates exports with dual format entry points using .cjs/.js extensions
lib/shared/config-manager/project.json	Adds ESM format output and removes outExtension override
lib/shared/config-manager/package.json	Updates exports with dual format entry points using .cjs/.js extensions
lib/shared/bucketing/project.json	Adds ESM format output and removes outExtension override
lib/shared/bucketing/package.json	Updates exports with dual format entry points using .cjs/.js extensions
dev-apps/js/webpack.config.js	Adds trailing blank lines (no functional changes)

Comments suppressed due to low confidence (1)

dev-apps/js/webpack.config.js:12

• Remove trailing blank lines at the end of the file.

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[Copilot]

Pull request overview

Copilot reviewed 25 out of 25 changed files in this pull request and generated 1 comment.

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[Copilot]

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.