JavaScript - JSON Tutorial Points (3)

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Use curly brackets to create JSON like JavaScript object and add properties and functions to the object.

JSON is a type of data-saving format.it saves data using key and value pairs.

<!DOCTYPE html> 
<html lang="en">
    <head>
        <meta charset="UTF-8">
        <meta http-equiv="XX-UA-Compatible" content="IE=edge">
        <meta name="viewport" content="width=device-width, initial-scale=1.0">
        <title>AF LAB 01 - Ex 02</title>

        <!-- JSON is a type of data saving format.it saves data using key and value pairs -->

    </head>
<body>
 <script>
     /*Use curly brackets to create JSON like JavaScript object and add properties and
functions to the object */

let student = {
    first : "Kamal",
    second : "Perera",
    age : 44,
    welcome: function(){
        return `${this.first} is ${this.age} years old`;
    }
};

    
document.write("<h1>" + student.first+"</h1>");
document.write("<h1>" + student.age+"</h1>");
document.write("<h1>" + student.welcome()+"</h1>");

//Undefined variabel => id
document.write("<h1>" + student.id+"</h1>");

//This is wrong use () tomethod
 document.write("<h1>" + student.welcome+"</h1>");


 </script>

</body>
    </html>


OutPut :





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