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What are the properties of an array object in JavaScript?
The Array object lets you store multiple values in a single variable. It stores a fixed-size sequential collection of elements of the same type.
The following is the list of the properties of the Array object −
| Sr.No | Property & Description |
| 1 | constructor Returns a reference to the array function that created the object. |
| 2 | index The property represents the zero-based index of the match in the string. |
| 3 | input This property is only present in arrays created by regular expression matches. |
| 4 | length Reflects the number of elements in an array. |
| 5 | prototype The prototype property allows you to add properties and methods to an object. |
Example
Let’s see an example of the prototype property
<html>
<head>
<title>JavaScript Array Object</title>
<script>
function book(title, author){
this.title = title;
this.author = author;
}
</script>
</head>
<body>
<script>
var myBook = new book("Java", "John");
book.prototype.price = null;
myBook.price = 300;
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>Output
Book title is : Java Book author is : John Book price is : 300
Updated on: 19-Jun-2020
4K+ Views
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