event javascript in button code example

Example 1: javascript click event

<button onclick="myFunction()">Click me</button>

<p id="demo"></p>

<script>
function myFunction() {
  document.getElementById("demo").innerHTML = "Hello World";
}
</script>

Example 2: javascript onclick button

var button = document.querySelector('button');
button.onclick = function() {
  //do stuff
}

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Html Example

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