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includes() function with example in JavaScript
JavaScript includes() function: Here, we are going to learn about the includes() function with example in JavaScript, how and when it is used?
Submitted by IncludeHelp, on February 01, 2019
includes() is a predefined function in JavaScript, which is used to check whether a given element exists in the array or not?
Example:
<html>
<head>
<title>JavaScipt Example</title>
</head>
<body>
<script>
//array
var cities = ["New Delhi", "Mumbai", "Chennai", "Banglore"];
//checking whether "New Delhi" exists or not
if(cities.includes("New Delhi")==true)
document.write("New Delhi exists in the array");
else
document.write("New Delhi does not exist in the array");
document.write("<br>");
//checking whether "Pune" exists or not
if(cities.includes("Pune")==true)
document.write("Pune exists in the array");
else
document.write("Pune does not exist in the array");
document.write("<br>");
</script>
</body>
</html>
Output
New Delhi exists in the array
Pune does not exist in the array