How to export a Node class?

Question

insira o código aquiVersion of Node 10.5.3 I am trying to export a class, to use it in another file. I have seen several examples on the internet and none of them helped me.

Below is the class I want to export.

class Retangulo {
    constructor(altura, largura) {
      this.altura = altura; this.largura = largura;
    }

    get area() {
        return this.calculaArea()  
    }  

    calculaArea() {  
        return this.altura * this.largura;  
    }
} 

module.exports = Retangulo;

And the file where I’m trying to use the Rectangular class

const Retangulo =  require('./teste.js');
var a =  new Retangulo(10,10)
console.log(a.area);

You can fix this error using "module.Exports = new Rectangle();", but then it returns an already instantiated object, and I want direct instantiation in the teste1.js file. I’m using the consign to load my routes.

This code is in my server.js file

consign().include('models').into(app);

Someone can help me with that. In case it’s not very clear, and just ask that I clarify.

Answer 1

Using ES6

export default Retangulo and then do import Retangulo from "./teste.js" see more examples

Using previous versions

class Retangulo {
        constructor(altura, largura){
                this.altura = altura
                this.largura = largura
        }
        // . . .
}

module.exports = Retangulo;

const Retangulo = require("./teste.js")

const a = new Retangulo(23,23)
// . . .