how to use external javascript file code example

Example 1: include script in html

<script type="text/javascript" src="/path/to/script.js"></script>

Example 2: calling javascript file in html

<script type="text/javascript" src="yourfile.js"></script>

Example 3: how to include external javascript in html

<script src="script.js">

Example 4: how to write code in external javascript file

function myFunction() {

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

}

Example 5: javascript class in external file

class User {
    //...
}

module.exports = User