How do I upgrade from CommonJS to ES Modules in my Node.js project?
To upgrade, you need to change your file extensions from .js to .mjs or set "type": "module" in your package.json.
What about the import and export syntax?
You should replace require()
with import
and module.exports
with export
. For example, const x = require('x')
becomes import x from 'x';
.
Are there any compatibility issues I should be aware of?
Yes, some older packages may not support ES Modules. Check the documentation of your dependencies.
Can I mix CommonJS and ES Modules?
Yes, but it's best to keep them separate to avoid confusion. You can use dynamic imports to load CommonJS modules in ES Modules.
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