Try it Editor: JavaScript Array Methods . delete

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<!DOCTYPE html>
<html>
<body>

<h2>JavaScript Array Methods</h2>

<p>Deleting elements leaves undefined holes in an array.</p>

<p id="demo1"></p>
<p id="demo2"></p>

<script>
var fruits = ["Banana", "Orange", "Apple", "Mango"];
document.getElementById("demo1").innerHTML =
"The first fruit is: " + fruits[0];
delete fruits[0];
document.getElementById("demo2").innerHTML =
"The first fruit is: " + fruits[0];
</script>

</body>
</html>

Result :