In this article, we will see the Backbone.js unset model. The Backbone.js unset model is used to unset or remove the value from the attributes in a given model.
Syntax:
Backbone.Model.unset(attribute);
Note: It takes one parameter.
- attribute: specifies the attribute in a model to be unsettled.
Example 1: In this example, we will unset the bookid attribute in a book model
HTML
<!DOCTYPE html> <html>
<head>
type="text/javascript">
</script>
<script src=
type="text/javascript">
</script>
<script src=
type="text/javascript">
</script>
<script type="text/javascript">
var Books = Backbone.Model.extend();
var book = new Books({
bookid: 23,
price: 678,
book_name: 'php'
});
document.write("bookid: ", book.get('bookid'));
// Unset the bookid
book.unset('bookid');
document.write("<br>")
document.write("bookid: ", book.get('bookid'));
</script>
</head>
<body></body>
</html>
|
Output:
bookid: 23 bookid: undefined
Example 2: In this example, we will unset the price attribute in a book model
HTML
<!DOCTYPE html> <html>
<head>
type="text/javascript"></script>
<script src=
type="text/javascript"></script>
<script src=
type="text/javascript"></script>
<script type="text/javascript">
var Books = Backbone.Model.extend();
var book = new Books({
bookid: 23,
price: 678,
book_name: 'php'
});
document.write("price: ", book.get('price'));
// Unset the bookid
book.unset('price');
document.write("<br>")
document.write("price: ", book.get('price'));
</script>
</head>
<body></body>
</html>
|
Output:
price: 678 price: undefined
Reference: https://backbonejs.org/#Model-unset