# How to work with delete operator in JavaScript?

HTMLProgramming ScriptsJavascript

Use the delete property in JavaScript, to remove a property from an object. You can try to run the following code to learn how to work with delete operator. Here, we are deleting the book price −

## Example

Live Demo
<html>
<title>JavaScript Delete Operator</title>
<script>
function book(title, author) {
this.title = title;
this.author = author;
}
</script>

<body>
<script>
var myBook = new book("WordPress Development", "Amit");
book.prototype.price = null;
myBook.price = 500;

document.write("<h2>Details before deleting book price</h2>");
document.write("Book title is : " + myBook.title + "<br>");
document.write("Book author is : " + myBook.author + "<br>");
document.write("Book price is : " + myBook.price);

delete myBook.price;

document.write("<br><h2>Details after deleting book price</h2>");
document.write("Book title is : " + myBook.title + "<br>");
document.write("Book author is : " + myBook.author + "<br>");
document.write("Book price is : " + myBook.price + "<br>");
</script>

</body>
</html>

Published on 26-Feb-2018 06:32:13