How to Use ECMAScript Modules in Node.js

How to Use ECMAScript Modules in Node.js

Learn how to ese ECMAScript modules in Node.js - The ECMAScript modules (in short ES modules) is a JavaScript modules format that use import and export. Starting version 13.2.0, Node.js has stable support ES modules. The default format of modules in Node.js is the CommonJS. To make Node.js understand ES modules format, you have to explicitly make so.

The ECMAScript modules (in short ES modules) is a JavaScript modules format that uses import and export statements:

// An ECMAScript module

// import statement
import myFunc from './my-func';

// export statement
export myOtherFunc(param) {
  const result = myFunc(param);
  // ....
  return otherResult;
}

Starting version 13.2.0, Node.js has stable support ES modules.

In this post, you’ll learn how to enable and use ES modules in Node.js.

Table of Contents

  • 1. Enabling ECMAScript modules in Node.js
  • 1.1 .mjs  file extension
  • 1.2 { “type”: “module” } in package.json
  • 2. Importing ECMAScript modules
  • 2.1 Relative specifier
  • 2.2 Bare specifier
  • 2.3 Absolute specifier
  • 3. Dynamic import of modules
  • 4. Mixing module formats
  • 5. ECMAScript modules and Node.js environment
  • 6. Conclusion

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