Tuto ES6

class.js

/*
  CLASS
 */
class Rectangle {
  constructor(height, width) {
    this.height = height;
    this.width = width;
  }

  get area() {
    return this.calcArea();
  }

  calcArea() {
    return this.height * this.width;
  }
}

const square = new Rectangle(5, 5);
const poster = new Rectangle(2, 3);
console.log(square.height);  //5
console.log(poster.width);  //3
console.log(square.area); // 25

class Point {
  constructor(a, b) {
    this.x = a;
    this.y = b;
  }

  getX() {
    return this.x;
  }

  getY() {
    return this.y;
  }

  static distance(a, b) {
    const dx = a.x - b.x;
    const dy = a.y - b.y;
    return Math.hypot(dx, dy);
  }
}

const p1 = new Point(7, 2);
const p2 = new Point(3, 8);
console.log(Point.distance(p1, p2));

class Animal {
  constructor(name) {
    this.name = name;
  }
  speak() {
    console.log(this.name + ' makes a noise.');
  }
}
class Dog extends Animal {
  speak() {
    console.log(this.name + ' barks.');
  }
}

let dog = new Dog('Rex');
dog.speak();

class Human {
  constructor(name) {
    this.name = name;
  }
  hello() {
    console.log('My name is ' + this.name);
  }
}

class Student extends Human {
  constructor(name, age) {
    super(name);
    this.age = age;
  }
  hello() {
    super.hello();
    console.log('I\'m ' + this.age + ' years old');
  }
}

let student = new Student('John', 25);
student.hello();

es6.js

let tree = {
  height: 10,
  color: 'green',
  grow() {
    this.height += 2;
  }
};
tree.grow();
console.log(tree.height); // 12

let height = 5;
let health = 100;

let athlete = {
  height,
  health
};
console.log(athlete);

let arr = ['1', '2', '3'];

let [one, two, three] = arr;

console.log(one); // 1
console.log(two); // 2
console.log(three); // 3

let a = () => {
  return [1, 3, 2];
};

let [o, , t] = a();
console.log(o); // 1
console.log(t); // 2

more.js

//Array Finding
var res = [4, 5, 1, 8, 2, 0].filter(function (x) {
  return x > 4;
})[0];
console.log(res);

//find
var res = [4, 5, 1, 8, 2, 0].find(x => x > 4);
console.log(res);

//findIndex
var index = [4, 5, 1, 8, 2, 0].findIndex(x => x > 3);
console.log(index);

//Reapeting strings
console.log(Array(3 + 1).join("foo")); // foofoofoo
console.log("foo".repeat(3)); // foofoofoo

//Searching strings
"SoloLearn".startsWith("Solo", 0); // true
"SoloLearn".endsWith("Solo", 4); // true
"SoloLearn".includes("loLe"); // true
"SoloLearn".includes("olo", 1); // true
"SoloLearn".includes("olo", 2); // false

promise.js

/*
  Promise
 */
function asyncFunc(work) {
  return new Promise(function(resolve, reject) {
    if (work === "")
      reject(Error("Nothing"));
    setTimeout(function() {
      resolve(work);
    }, 1000);
  });
}

asyncFunc("Work 1") // Task 1
    .then(function(result) {
      console.log(result);
      return asyncFunc("Work 2"); // Task 2
    }, function(error) {
      console.log(error);
    })
    .then(function(result) {
      console.log(result);
    }, function(error) {
      console.log(error);
    });
console.log("End");