var testPattern = '<div>hello<div style="background-color: #000000;">ttt</div></div>';
  var i, testString;
  for (i = 0; i < 1000; i++) {
    testString += testPattern;
  }
  
  function replaceHtml(el,html) {
  	var oldEl = (typeof el === "string" ? document.getElementById(el) : el);
  	var newEl = oldEl.cloneNode(true);
  	newEl.innerHTML = html;
  	oldEl.parentNode.replaceChild(newEl, oldEl);
  }

Teardown JS

Test cases

Test #1

Title *

Async

Code *replaceHtml('box1',testPattern);

Test #2

Title *

Async

Code *document.getElementByID("box1").innerHTML = testPattern;

Test case details

Preparation Code

Test cases

Test #1

Test #2