How to use EcmaScript modules in Node.js ?

CommonJS modules consists usage of exports and require() statements, while EcmaScript modules consists usage of import and export statements.

Learn more here: Difference between node.js require and ES6 import and export

Node.js treats JS code as CommonJS modules by default, However the EcmaScript modules can be used instead of using –experimental-modules flag.

Follow the below mentioned Steps:

• Initialize a package.json for Node.js project inside desired folder using following command, and enter values as prompted.

  npm init

• Enter following command to skip prompts:

  npm init -y

  

• Open newly created package.json and add following field.

  "type":"module"    

  

  Example:

• File structure:

  

• Example:
  area.js

  const areaOfRectangle = (length, breadth) => {
      return length * breadth
  }
  
  export default areaOfRectangle
  index.js

  import areaOfRectangle from './area.js'
  
  console.log('Area of rectangle: ', areaOfRectangle(5, 8))

Output: