ES6 undefined $ {this.name}

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ES6 undefined $ {this.name}

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#1 by (2 votes)

2

Friends I'm trying the following

class Player{

    //todo lo que resiba este const será la clase persona
    constructor(nombre,edad){
        nombre == this.nombre;
        edad == this.edad;

    }

    mA(){
        console.log('la edad es de ${this.edad}')
    }
}


let px = new Player('kyo',21);
px.mA();

but it gives me

the age is undefined

Does anyone know why? Am I jumping something?

javascript ecmascript-6

asked by E.Rawrdríguez.Ophanim 30.12.2018 в 03:56

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1 answer

Type that has the name of the class How to make my website visible with a public ip?

score 2 · Accepted Answer

You have the following errors.

In the constructor properties are initialized so the operator is = that is equal to and you are wrong to use == which is to compare if the value on the left is equal to the value on the right

The constructor receives the properties and initializes them so this.prop = prop

Then the final code is:

    class Player{
    
        //todo lo que resiba este const será la clase persona
        constructor(nombre,edad){
            this.nombre = nombre
            this.edad = edad
    
        }
    
        mA(){
            console.log('la edad es de ${this.edad}')
        }
    }
    
    
    let px = new Player('kyo',21);
    px.mA();

The final result you will get is:

"la edad es de 21"

IMPORTANT NOTE

Using = is to assign a value, that is% a = 9;

Using == is to indicate if the left side is equal in value to the right side, for example 10 == 10

Using === is to indicate whether the left side is equal in type and value to the right side; for example 10 === 10 that will give true and 10 === "10" will false because the value on the right is a string of text