js external code example

Example 1: how to add script in html head

<script src="script.js" defer></script>

<!--just add defer attribute so script will execute at last-->

Example 2: how to include external javascript in html

<script src="script.js">

Example 3: how to write code in external javascript file

function myFunction() {

  document.getElementById("demo").innerHTML = "Paragraph changed.";

}