hey, here's a bolt, and some metal parts, would you like to put them together?

gistfile1.txt

wrap2 = (c) => {
  let isPropFunc = (k) => (typeof c[k] === 'function')
  let isProto = (k) => isPropFunc(k) && !!c[k].prototype
  let logAccess = (k, v) => {
    console.log(`trying to access ${k} at ${c} with ${v}`);
  }
  console.log(`wrapping ${c}`)
  let res = {}
  let shouldBind = (v) => !!v && (typeof v == 'object') && (!v.prototype) && (v.__proto__ === HTMLDocument.prototype || v.__proto__ === Window.prototype || v.prototype && v.prototype.isPrototypeOf(document.HTMLElementPrototype))
  let cat = (k) => (...args) => {
    let v = null
    try {
      v = c[k].apply(c, args);
    } catch (e) {
      console.log(e);
      try {
        v = c[k].apply(c, []);
      } catch (e) {
        console.log(e);
      }
    }
    logAccess(k, v);
    if (shouldBind(v))
      return wrap2(v)
    else
      return v;
  }
  let dog = (k) => {
    res.__defineGetter__(k, () => {
      const v = c[k]
      logAccess(k, v);
      if (shouldBind(v))
        return wrap2(v)
      else
        return v;
    })
  }
  let ks = new Set()
  const travs = (c, s) => ((c != Object.getPrototypeOf({})) ? ((Object.getOwnPropertyNames(c).forEach(k => s.add(k))) + travs(Object.getPrototypeOf(c), s)) : null)
  travs(c, ks)
  ks = Array.from(ks)
  ks.forEach(k => (isPropFunc(k) && !isProto(k)) && (res[k] = cat(k)))
  ks.forEach(k => {
    if (isProto(k)) {
      // console.log(`binding proto ${k}`)
      res[k] = c[k]
    }
  })
  ks.forEach(k => (!isPropFunc(k)) && (dog(k)))
  return res
}

run = () => {
  html2canvas(wrap2(document.querySelector(".screenContent")), {allowTaint: true, foreignObjectRendering:true}).then(canvas => {
      document.body.appendChild(canvas)
  })
}
/*
let wrap = (c) => new Proxy(c, {
    get: function(target, name) {
        if (!(name in target)) {
            console.log("Getting non-existant property '" + name + "'");
            return undefined;
        }
        return target[name];
    },
    set: function(target, name, value) {
        if (!(name in target)) {
            console.log("Setting non-existant property '" + name + "', initial value: " + value);
        }
        target[name] = value;
    }
});

res = new Set()
travv = (c) => ((c !== Object) ? (console.log(Object.keys(c)) + travv(Object.getPrototypeOf(c))) : null)
travs = (c, s) => ((c !== Object) ? ((Object.keys(c).forEach(k => s.add(k))) + travs(Object.getPrototypeOf(c), s)) : null)
*/