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)js includes
const pets = ['cat', 'dog', 'bat'];
console.log(pets.includes('cat'));
// output: truejavascript list include
const array1 = [1, 2, 3];
console.log(array1.includes(2));
// expected output: true
const pets = ['cat', 'dog', 'bat'];
console.log(pets.includes('cat'));
// expected output: true
console.log(pets.includes('at'));
// expected output: falseincludes in js
const names = ["Mario", "Anna", "Jacob"];
console.log(names.includes("Jade")) // Output: False
// It Checks If (Names) Contain's ("Jade") Or Not
console.log(names.includes("Anna")) // Output: True
// It Checks If (Names) Contain's ("Anna") Or NotCopyright © 2021 Codeinu
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