get elements that are overflowing.js

var docWidth = document.documentElement.offsetWidth;

[].forEach.call(
  document.querySelectorAll('*'),
  function(el) {
    if (el.offsetWidth > docWidth) {
      // el.style.outline = "1px solid red";
      console.log(el, docWidth, el.offsetWidth);
    }
  }
);