how to activate a function when a button is pressed in html code example
Example 1: button functions html
<script>
function myFunction() {
alert("ALERT");
}
</script>
<button onclick="myFunction">Click</button>
Example 2: javascript onclick
// The element id (TheElementID) and var name (myElement) can be named anything.
var myElement = document.getElementByID('TheElementID');
myElement.onclick = function() {
// Carry out a function here...
}