How to create an object using JavaScript?

Objects can be created in many ways. One way is to create the object and add the fields directly.

<script type="text/javascript">

var myMovie = new Object();

myMovie.title = "Aliens";

myMovie.director = "James Cameron";

document.write("movie: title is \""+myMovie.title+"\"");

< 

This produces

movie: title is "Aliens"

To create an object you write a method with the name of your object and invoke the method with "new".

<script type="text/javascript">

function movie(title, director) {

this.title = title;

this.director = director;

}

var aliens = new movie("Aliens","Cameron");

document.write("aliens:"+aliens.toString());

</script>

This produces

aliens:[object Object]

You can also use an abbreviated format for creating fields using a ":" to separate the name of the field from its value. This is equivalent to the above code using "this.".

<script type="text/javascript">

function movie(title, director) {

title : title;

director : director;

}

var aliens = new movie("Aliens","Cameron");

document.write("aliens:"+aliens.toString());

</script>

This produces

aliens:[object Object]