@intlify/core

The intlify core module for i18n

Which dist file to use?

core(.runtime).global(.prod).js:
- For direct use via <script src="..."> in the browser. Exposes the IntlifyCore global
- Note that global builds are not UMD builds. They are built as IIFEs and is only meant for direct use via <script src="...">
- In-browser locale messages compilation:
  - core.global.js is the "full" build that includes both the compiler and the runtime so it supports compiling locale messages on the fly
  - core.runtime.global.js contains only the runtime and requires locale messages to be pre-compiled during a build step
- Inlines internal the bellow packages - i.e. it’s a single file with no dependencies on other files. This means you must import everything from this file and this file only to ensure you are getting the same instance of code
  - @intlify/shared
  - @intlify/message-resolver
  - @intlify/message-compiler
- Contains hard-coded prod/dev branches, and the prod build is pre-minified. Use the *.prod.js files for production
core(.runtime).esm-browser(.prod).js:
- For usage via native ES modules imports (in browser via <script type="module">)
- Shares the same runtime compilation, dependency inlining and hard-coded prod/dev behavior with the global build

core(.runtime).esm-bundler.js:
- For use with bundlers like webpack, rollup and parcel
- Leaves prod/dev branches with process.env.NODE_ENV guards (must be replaced by bundler)
- Does not ship minified builds (to be done together with the rest of the code after bundling)
- Imports dependencies (e.g. @intlify/message-compiler, @intlify/message-resolver)
  - Imported dependencies are also esm-bundler builds and will in turn import their dependencies (e.g. @intlify/message-compiler imports @intlify/shared)
  - This means you can install/import these deps individually without ending up with different instances of these dependencies, but you must make sure they all resolve to the same version
- In-browser locale messages compilation:
  - core.runtime.esm-bundler.js (default) is runtime only, and requires all locale messages to be pre-compiled. This is the default entry for bundlers (via module field in package.json) because when using a bundler templates are typically pre-compiled (e.g. in *.json files)
  - core.esm-bundler.js: includes the runtime compiler. Use this if you are using a bundler but still want locale messages compilation (e.g. templates via inline JavaScript strings)

core.cjs(.prod).js:
- For use in Node.js via require()
- If you bundle your app with webpack with target: 'node' and properly externalize @intlify/core, this is the build that will be loaded
- The dev/prod files are pre-built, but the appropriate file is automatically required based on process.env.NODE_ENV