Get all Attributes from a HTML element with Javascript/jQuery

Question

I want to put all attributes in a Html element into an array: like i have a jQuery Object, whichs html looks like this:

Answer 1

Element.prototype.getA = function (a) {
        if (a) {
            return this.getAttribute(a);
        } else {
            var o = {};
            for(let a of this.attributes){
                o[a.name]=a.value;
            }
            return o;
        }
    }

having

...

can use

mydiv.getA() // {id:"mydiv",a:'1',b:'2'}