Recursively copies a JS object without drawing any references.

deepCopy.js

function Instance(obj) {
    let nobj={};
    for(let prop in obj) {
        let val = obj[prop];
        if(typeof val === "number") { nobj[prop] = Number(val); }
        if(typeof val === "string") { nobj[prop] = String(val); } 
        if(typeof val === "function") { nobj[prop] = val; } 
        if(typeof val === "object") {
            if(Array.isArray(val)) {
                nobj[prop]=[];
                for(let i = 0; i < val.length; i++) {
                    nobj[prop][i] = Instance(val[i]);
                }
            }
            else {
                nobj[prop] = Instance(val); 
            }
        }
    }
    return nobj;
}