JAVASCRIPT

Javascript Class Methods

// constructor function
function Person (name) {

   // assigning  parameter values to the calling object
    this.name = name;

    // defining method
    this.greet = function () {
        return ('Hello' + ' ' + this.name);
    }
}

js class syntax

// method 1

function nested(name , age , color){
    this.name = name;
    this.details = { 
        age : age,
        color : color
    }
}

let nestedObj = new nested( "Elroi" , 22 , "blue");
 console.log(nestedObj)


// method 2
class Nested2{
    constructor(name , age , color){
        this.name = name;
        this.details = {
            age : age,
            color : color
        }
    };

    displayInfo(){
        console.log(`${this.name} ${this.details.age} ${this.details.color} `)
    } 
}

let aaa  = new Nested2("Ean" , 14 , "black");
aaa.displayInfo(); 

this in js class method

function add(c, d) {
  return this.a + this.b + c + d;
}

var o = {a: 1, b: 3};

// The first parameter is the object to use as
// 'this', subsequent parameters are passed as
// arguments in the function call
add.call(o, 5, 7); // 16

// The first parameter is the object to use as
// 'this', the second is an array whose
// members are used as the arguments in the function call
add.apply(o, [10, 20]); // 34