Creating ES6 class with a config object as a parameter

[Stanimirski]

My reason for doing it that way:

• When I instantiate the class, I can use an object as a parameter and all the available properties will be suggested(if they exist) when I start typing the property.
• Because of the object sealing I cant add properties that are not predefined.

My questions are:

• is there a better way of doing something similar?
• is there another way to get suggestions of the parameters i can add when instantiating the shape?
• is my way a considered as bad?

class DimensionsConf{
    constructor(){
        this.position = null;
        this.width = null;
        this.height = null;
        this.radius = null;
        this.diameter = null;
        Object.seal(this);
    }
}

class AttributesConf{
    constructor(){
        this.color = null;
        this.visible = true;
        Object.seal(this);
    }
}

export default class Shape{
    constructor(dimConf = new DimensionsConf(), attrConf = new AttributesConf()){
        let dimensionsConfig = new DimensionsConf();
        Object.assign(dimensionsConfig, dimConf)
        let attributesConfig = new AttributesConf();
        Object.assign(attributesConfig, attrConf);
        Object.assign(this, dimConf);  
        Object.assign(this, attrConf);
        console.log(this);  
    }
}

type or paste code here