Hi dear welcome to "CodePrime" Blog . In this post you are going to learn JavaScript Array Methods - Find & FindIndex Function | Javascript Tutorial: 31 . First Creat A index.html file Copy This HTML CODE and pest it one your code editor. 2ndly creat style.css file Then Copy The CSS CODE and pest it then open the index.html file with your browser.
HTML CODE
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<script src="find-and-findindex.js"></script>
<title>javascript</title>
</head>
<body>
<br><br>
<h2>Javascript Tutorial <br>By Codeprime</h2>
</body>
<style>
h2{
color:#fff;
background-color: #000;
padding: 5px;
}
</style>
</html>
JVASCRIPT CODE
document.write("<h2>Find-Findindex</h2> <br>");
var a = [10,17,12,2,30];
document.write(a + "<br><br>")
//var adultAge = 18;
var b = a.findIndex(checkAdults);
document.write(b + "<br><br>");
function checkAdults(age){
return age >= 18;
}
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