Cookie with multiple Name-Value pairs

In JavaScript, a cookie can contain only a single name-value pair. However, to store more than one name-value pair, we can use the following approach: -

Serialize the custom object in a JSON string, parse it and then store in a cookie.
For each name-value pair, use a separate cookie.

Examples to Store Name-Value pair in a Cookie

Example 1

Let's see an example to check whether a cookie contains more than one name-value pair.

<!DOCTYPE html>
<html>
<head>
</head>
<body>
    Name: <input type="text" id="name"><br>
    Email: <input type="email" id="email"><br>
    Course: <input type="text" id="course"><br>
<input type="button" value="Set Cookie" onclick="setCookie()">
<input type="button" value="Get Cookie" onclick="getCookie()">
<script>
    function setCookie()
    {
//Declaring 3 key-value pairs
        var info="Name="+ document.getElementById("name").value+";Email="+document.getElementById("email").value+";Course="+document.getElementById("course").value;
//Providing all 3 key-value pairs to a single cookie
        document.cookie=info;
    }

    function getCookie()
    {
        if(document.cookie.length!=0)
        {
       //Invoking key-value pair stored in a cookie
        alert(document.cookie);
        }
        else
        {
        alert("Cookie not available")
        }
    }
</script>
</body>
</html>

Output:

Test it Now JavaScript Cookie with multiple Name

On clicking Get Cookie button, the below dialog box appears.

Here, we can see that only a single name-value is displayed.

However, if you click, Get Cookie without filling the form, the below dialog box appears.

Example 2

Let's see an example to store different name-value pairs in a cookie using JSON.

<!DOCTYPE html>
<html>
<head>
</head>
<body>
    Name: <input type="text" id="name"><br>
    Email: <input type="email" id="email"><br>
    Course: <input type="text" id="course"><br>
<input type="button" value="Set Cookie" onclick="setCookie()">
<input type="button" value="Get Cookie" onclick="getCookie()">

<script>
    function setCookie()
{
    var obj = {};//Creating custom object
    obj.name = document.getElementById("name").value;
    obj.email = document.getElementById("email").value;
    obj.course = document.getElementById("course").value;

//Converting JavaScript object to JSON string    
var jsonString = JSON.stringify(obj);

    document.cookie = jsonString;
}
         function getCookie()
{
    if( document.cookie.length!=0)
    {
//Parsing JSON string to JSON object
    var obj = JSON.parse(document.cookie);
    
        alert("Name="+obj.name+" "+"Email="+obj.email+" "+"Course="+obj.course);
    }
    else
    {
        alert("Cookie not available");
    }
}
    </script>
</body>
</html>

Test it Now

Output:

On clicking Get Cookie button, the below dialog box appears.

Here, we can see that all the stored name-value pairs are displayed.

Example 3

Let's see an example to store each name-value pair in a different cookie.

<!DOCTYPE html>
<html>
<head>
</head>
<body>
    Name: <input type="text" id="name"><br>
    Email: <input type="email" id="email"><br>
    Course: <input type="text" id="course"><br>
<input type="button" value="Set Cookie" onclick="setCookie()">
<input type="button" value="Get Cookie" onclick="getCookie()">

<script>
 function setCookie()
{
    document.cookie = "name=" + document.getElementById("name").value;
    document.cookie = "email=" + document.getElementById("email").value;
    document.cookie = "course=" + document.getElementById("course").value;
}
function getCookie()
{
    if (document.cookie.length != 0)
    {
        alert("Name="+document.getElementById("name").value+" Email="+document.getElementById("email").value+" Course="+document.getElementById("course").value);
    }    
    else
    {
        alert("Cookie not available");
    }
}   
 </script>
</body>
</html>

Output:

Test it Now JavaScript Cookie with multiple Name