JSON - Objects


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Creating Simple Objects

JSON objects can be created with JavaScript. Let us see the various ways of creating JSON objects using JavaScript −

  • Creation of an empty Object −
var JSONObj = {};
  • Creation of a new Object −
var JSONObj = new Object();
  • Creation of an object with attribute bookname with value in string, attribute price with numeric value. Attribute is accessed by using '.' Operator −

var JSONObj = { "bookname ":"VB BLACK BOOK", "price":500 };

This is an example that shows creation of an object in javascript using JSON, save the below code as json_object.htm

<html>
   <head>
      <title>Creating Object JSON with JavaScript</title>
	
      <script language = "javascript" >

         var JSONObj = { "name" : "tutorialspoint.com", "year"  : 2005 };
		
         document.write("<h1>JSON with JavaScript example</h1>");
         document.write("<br>");
         document.write("<h3>Website Name = "+JSONObj.name+"</h3>");  
         document.write("<h3>Year = "+JSONObj.year+"</h3>");  

      </script>
		
   </head>
	
   <body>
   </body>
	
</html>

Now let's try to open Json Object using IE or any other javaScript enabled browser. It produces the following result −

Json Objects

Creating Array Objects

The following example shows creation of an array object in javascript using JSON, save the below code as json_array_object.htm

<html>
   <head>
      <title>Creation of array object in javascript using JSON</title>
		
      <script language = "javascript" >

         document.writeln("<h2>JSON array object</h2>");

         var books = { "Pascal" : [ 
            { "Name"  : "Pascal Made Simple", "price" : 700 },
            { "Name"  : "Guide to Pascal", "price" : 400 }],  
				
            "Scala"  : [
               { "Name"  : "Scala for the Impatient", "price" : 1000 }, 
               { "Name"  : "Scala in Depth", "price" : 1300 }]    
         }    

         var i = 0
         document.writeln("<table border = '2'><tr>");
			
         for(i = 0;i<books.Pascal.length;i++){	
            document.writeln("<td>");
            document.writeln("<table border = '1' width = 100 >");
            document.writeln("<tr><td><b>Name</b></td><td width = 50>" + books.Pascal[i].Name+"</td></tr>");
            document.writeln("<tr><td><b>Price</b></td><td width = 50>" + books.Pascal[i].price +"</td></tr>");
            document.writeln("</table>");
            document.writeln("</td>");
         }

         for(i = 0;i<books.Scala.length;i++){
            document.writeln("<td>");
            document.writeln("<table border = '1' width = 100 >");
            document.writeln("<tr><td><b>Name</b></td><td width = 50>" + books.Scala[i].Name+"</td></tr>");
            document.writeln("<tr><td><b>Price</b></td><td width = 50>" + books.Scala[i].price+"</td></tr>");
            document.writeln("</table>");
            document.writeln("</td>");
         }
			
         document.writeln("</tr></table>");

      </script>

   </head>
	
   <body>
   </body>
	
</html>

Now let's try to open Json Array Object using IE or any other javaScript enabled browser. It produces the following result −

json array objects

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