@esbuild-kit/cjs-loader is an npm package that allows you to use ES modules (ESM) in CommonJS (CJS) environments. It leverages esbuild to transpile ESM to CJS on the fly, enabling seamless integration of modern JavaScript modules in older Node.js projects.
What are @esbuild-kit/cjs-loader's main functionalities?
Transpile ESM to CJS
This feature allows you to transpile ES modules to CommonJS on the fly. By registering the loader, you can require ESM files in a CJS environment.
You can customize the loader options such as the target ECMAScript version and the output format. This provides flexibility in how the ESM is transpiled to CJS.
The 'esm' package allows you to use ES modules in Node.js without the need for a build step. It provides a seamless way to load ESM in a CJS environment, similar to @esbuild-kit/cjs-loader, but without leveraging esbuild for transpilation.
The 'babel-register' package hooks into Node.js require to transpile files on the fly using Babel. It supports a wide range of JavaScript syntax transformations, including ESM to CJS, but may have a larger performance overhead compared to @esbuild-kit/cjs-loader.
The 'ts-node' package allows you to run TypeScript files directly in Node.js. It can also handle ESM to CJS transpilation when used with appropriate TypeScript configurations. It is more focused on TypeScript but can be used for similar purposes.
Warning: When set to preserve, the JSX syntax will remain untransformed. To prevent Node.js from throwing a syntax error, chain another Node.js loader that can transform JSX to JS.
Modules transformations are cached in the system cache directory (TMPDIR). Transforms are cached by content hash so duplicate dependencies are not re-transformed.
Set environment variable ESBK_DISABLE_CACHE to a truthy value to disable the cache:
We found that @esbuild-kit/cjs-loader demonstrated a healthy version release cadence and project activity because the last version was released less than a year ago.It has 1 open source maintainer collaborating on the project.
Last updated on 14 Sep 2023
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