document.getElementById in JS+w3schools code example
Example 1: document.getelementbyid() javascript
var x = document.getElementById("demo"); // Get the element with id="demo"
x.style.color = "red"; // Change the color of the element
Example 2: how to use document.getelementbyid
<p id="YourId">How to use document.GetElementById in HTML</p>
<script>
function demo(){
document.GetElementById('YourId')./* The thing you need to do to your code... Here I want .innerHTML you can take any... */.innerHTML('/* what will it change... */')
}
</script>
<!-- Now execute it by writing the button tag!--><button onclick="demo()">Click Me!!!</button>