JSFiddle - React, Tailwind, and code Playground

by wangtn18

HTML

<!--  
Tìm hiểu các method của document:
- getElementsByClassName
- getElementsByTagName
- querySelector
- querySelectorAll
-->
<!DOCTYPE html>
<html>
<body>

<div class="example">First div element with class="example".</div>

<div class="example">Second div element with class="example".</div>

<p>Click the button to change the text of the first div element with class="example" (index 0).</p>

<button onclick="myFunction()">Try it</button>


<!-- <script>
function myFunction() {
  var x = document.getElementsByClassName("example");
  x[0].innerHTML = "Hello World!";
}
</script> -->

</body>
</html>