JavaScript: How to copy all properties of Object to a Class variables?

Question

I want to transfer object's properties to a class' variables. For example:

const obj = {
    a: 1,
    b: 'hey',
}

class TestClass {
    constructor(parentObject) {

        // I need: this = parentObject, this.a must refers to parentObject.a, this.b = parentObject.b ...
        ...

    }
}

const aClassObj = new TestClass(obj);
console.log(aClassObj.a); // should return 1

I don't want to make them equal in every line for example:

this.a = parentObject.a
this.b = parentObject.b

---

Whatever in parentObject must be in this .

Thanks!

Answer 1

You can merge the object with the this reference using Object.assign()

 const obj = {a: 1,b: 'hey'} class TestClass { constructor(parentObject) { Object.assign(this, obj) } } const aClassObj = new TestClass(obj); console.log(aClassObj.a);