html change button text with javascript code example

Example 1: javascript change button text onclick

<!DOCTYPE html>
<html>
<body>

<button id="demo" onclick="myFunction()">Click me to change my HTML content (innerHTML).</button>

<script>
function myFunction() {
  document.getElementById("demo").innerHTML = "Paragraph changed!";
}
</script>

</body>
</html>

Example 2: js change button text

<button id="buttonName">Old Text</button>
<script>document.getElementById('buttonName').innerText = 'New Text';</script>