String Functions

<!DOCTYPE html>
<html>
<body>

<h2>JavaScript String Search</h2>

<p>Check if a string includes "world":</p>

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

<p>The includes() method is not supported in Internet Explorer.</p>

<script>
let text = "Hello world, welcome to the closetag.";
document.getElementById("demo").innerHTML = text.includes("world");
</script>

</body>
</html>