export

export { name1, name2, , nameN };
export { variable1 as name1, variable2 as name2, , nameN };
export let name1, name2, , nameN; //  var
export let name1 = , name2 = , , nameN; //  var, const

export default ;
export default function () {  } //  class, function*
export default function name1() {  } //  class, function*
export { name1 as default,  };

export * from ;
export { name1, name2, , nameN } from ;
export { import1 as name1, import2 as name2, , nameN } from ;

nameN

( import ()).

, :

• :

  js

  export { myFunction }; //    
  export const foo = Math.sqrt(2); //  
  

• ( ) ( ):

  js

  export default function () {} //  'export default class {}'
  //      
  

. , , .

(default), (). , , - . "", .

:

// "my-module.js"
function cube(x) {
  return x * x * x;
}
const foo = Math.PI + Math.SQRT2;
export { cube, foo };

(. import) :

import { cube, foo } from "my-module";
console.log(cube(3)); // 27
console.log(foo); // 4.555806215962888

export default

(fallback) , export default.

// "my-module.js"
export default function cube(x) {
  return x * x * x;
}

, :

import cube from "my-module";
console.log(cube(3)); // 27

• import
• ES6 in Depth: Modules, Hacks blog post by Jason Orendorff
• Axel Rauschmayer's book: "Exploring JS: Modules"