JavaScript - Read JSON Object

Submitted by razormist on Tuesday, December 10, 2019 - 12:14.

In this tutorial we will create a Read JSON Object using JavaScript. This code will read the data as a JSON objects. The code itself use a onclick() function to launch a method that read the JSON object and display in HTML table using for() loop. You can apply this script to your code, it is a user-friendly program feel free to modify it. We will use JavaScript to add some new feature to the website interface by actually written into an HTML page. It is what gives your page a different interactive elements and animation that engage a user. .

Getting Started:

First you have to download bootstrap framework, this is the link for the bootstrap that I used for the layout design https://getbootstrap.com/.

The Main Interface

This code contains the interface of the application. To create this just write these block of code inside the text editor and save this as index.html.

<!DOCTYPE html>
<html lang="en">
        <head>
                <meta charset="UTF-8" name="viewport" content="width=device-width, initial-scale=1"/>
                <link rel="stylesheet" type="text/css" href="css/bootstrap.css"/>
        </head>
<body>
        <nav class="navbar navbar-default">
                <div class="container-fluid">
                        <a class="navbar-brand" href="https://sourcecodester.com">Sourcecodester</a>
                </div>
        </nav>
        <div class="col-md-3"></div>
        <div class="col-md-6 well">
                <h3 class="text-primary">JavaScript - Read JSON Object</h3>
                <hr style="border-top:1px dotted #ccc;"/>
                <div class="col-md-3">
                        <center><button class="btn btn-primary" type="button" onclick="readJSON();">Read JSON</button></center>
                </div>
                <div class="col-md-9">
                        <table class="table table-bordered">
                                <thead class="alert-info">
                                        <tr>
                                                <th>Firstname</th>
                                                <th>Lastname</th>
                                                <th>Address</th>
                                        </tr>
                                </thead>
                                <tbody id= "result"></tbody>
                        </table>
                </div>
        </div>
</body>
<script src="js/script.js"></script>
</html>

Creating the Script

This code contains the script of the application. This code will read the JSON object when the button is clicked. To do this just copy and write these block of codes as shown below inside the text editor and save it as script.js inside the js directory

function readJSON(){
        var data = [
                {firstname: 'John', lastname: 'Smith', address: 'New York'},
                {firstname: 'Claire', lastname: 'Temple', address: 'Racoon City'}
        ];
        
        
        var table = "" ;
        
                for(var i in data){
                        table += "<tr>";
                        table += "<td>" 
                                        + data[i].firstname +"</td>" 
                                        + "<td>" + data[i].lastname +"</td>" 
                                        + "<td>" + data[i].address +"</td>" ;
                        table += "</tr>";
                }
        
        document.getElementById("result").innerHTML = table;
                
}

There you have it we successfully created a Read JSON Object using JavaScript. I hope that this simple tutorial help you to what you are looking for. For more updates and tutorials just kindly visit this site. Enjoy Coding!

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