JSFiddle - React, Tailwind, and code Playground

HTML

<div data-foo-bar-id=""></div>

JavaScript

function querySelectorPattern(regex, element) {
  var elements = document.getElementsByTagName(element),
    found,
    regexp = new Regex(regex);
  for (var i = 0; i < elements.length; i++) {
    for (var k = 0; k < elements[i].attributes.length; k++) {
      console.log(elements[i].attributes.nodeName);
    }
  }
}

querySelectorPattern();