include script in html
<script type="text/javascript" src="/path/to/script.js"></script>include script in html
<script type="text/javascript" src="/path/to/script.js"></script>include js in html
<html>
<head>
</head>
<body>
<script type="text/javascript" src=es4.js></script>
</body>
</html>javascript contains substring
var str = "We got a poop cleanup on isle 4.";
if(str.indexOf("poop") !== -1){
alert("Not again");
}
//use indexOf (it returns position of substring or -1 if not found)how to add script in html head
<script src="script.js" defer></script>
<!--just add defer attribute so script will execute at last-->include js to js
var imported = document.createElement('script');
imported.src = '/path/to/imported/script';
document.head.appendChild(imported);javascript includes
const pets = ['cat', 'dog', 'bat'];
console.log(pets.includes('cat'));
// output: trueCopyright © 2021 Codeinu
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