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$ curl repovive.com/roadmaps/javascript/modules-imports/module-file-extensions

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$ curl repovive.com/roadmaps/javascript/modules-imports/module-file-extensions

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Module File Extensions

.js vs .mjs

In Node.js, use .mjs extension or set "type": "module" in package.json to use ES modules.

// package.json
{
  "type": "module"
}

With this setting, .js files are treated as ES modules. Without it, use .mjs extension explicitly.