Change Content - Javascript
Change html element content using pure javascript author(s): Deepu Mohan Puthrote (WarFox)
HTML
<html>
<body>
<p>substring() extracts a part of a string:</p>
<p id="demo"></p>
</body>
</html>
JavaScript
let text = "Hello world!";
let result = text.substring(7, 5);
document.getElementById("demo").innerHTML = result;