// Expression bodies

var odds = evens.map(v => v + 1);

var nums = evens.map((v, i) => v + i);

var pairs = evens.map(v => ({even: v, odd: v + 1}));



// Statement bodies

nums.forEach(v => {

if (v % 5 === 0)

fives.push(v);

});



// Lexical this

var bob = {

_name: "Bob",

_friends: [],

printFriends() {

this._friends.forEach(f =>

console.log(this._name + " knows " + f));

}

}

// lib/math.js
export function sum(x, y) {
  return x + y;
}
export var pi = 3.141593;

// app.js
import ∗ as math from "lib/math";
alert("2π = " + math.sum(math.pi, math.pi));

// otherApp.js
import {sum, pi} from "lib/math";
alert("2π = " + sum(pi, pi));
Some additional features include export default and export ∗:
// lib/mathplusplus.js
export ∗ from "lib/math";
export var e = 2.71828182846;
export default function(x) {
    return Math.log(x);
}
// app.js
Import In, {pi, e} from "lib/mathplusplus";
Alert ("2π = " + In(e)∗pi∗2);

class SkinnedMesh extends THREE.Mesh {
  constructor(geometry, materials) {
    super(geometry, materials);

    this.idMatrix = SkinnedMesh.defaultMatrix();
    this.bones = [];
    this.boneMatrices = [];
    //...
  }
  update(camera) {
    //...
    super.update();
  }
  get boneCount() {
    return this.bones.length;
  }
  set matrixType(matrixType) {
    this.idMatrix = SkinnedMesh[matrixType]();
  }
  static defaultMatrix() {
    return new THREE.Matrix4();
  }
}