How to read json file located in project folder in iPhone PhoneGap using Javascript

cordova, ios, javascript, jquery, json

Solution

You would read it just like it is on your server.

Solution 1 - jQuery

If jQuery usage is not a problem then use it like this:

//Load categories object JSON
jQuery.getJSON("categories.json", function(data){         
    // data is yours parsed object
});

Example :

HTML :

<!DOCTYPE html>
<html lang="en">
<head>
    <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
    <meta name="viewport" content="width=device-width,initial-scale=1,maximum-scale=1,user-scalable=no"/>
    <script src="http://www.fajrunt.org/js/jquery-1.9.1.min.js"></script>       
    <title>Read JSON Demo</title>

    <script>    
        jQuery.getJSON("categories.json", function(data){         
            alert(data.balance);
        });         
    </script>
</head>

<body>
    Read JSON Demo
</body>
</html>

JSON file :

{"balance":1000.21,"num":100,"nickname":null,"is_vip":true,"name":"foo"}

Solution 2 - Pure javascript

If you want to use only vanilla javascript then this is a solution for you

var xmlhttp;
var jsonObject;

// code for IE7+, Firefox, Chrome, Opera, Safari
if (window.XMLHttpRequest)
{
    xmlhttp=new XMLHttpRequest();
}
// code for IE6, IE5
else
{
    xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");
}

xmlhttp.onreadystatechange=function()
{
    if (xmlhttp.readyState==4 && xmlhttp.status==200)
    {
        jsonObject = JSON.parse(xmlhttp.responseText);
        alert(jsonObject.balance);                       
    }
}

xmlhttp.open("GET","categories.json",true);
xmlhttp.send();

Example :

HTML :

<!DOCTYPE html>
<html lang="en">
<head>
    <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
    <meta name="viewport" content="width=device-width,initial-scale=1,maximum-scale=1,user-scalable=no"/>
    <title>Read JSON Demo</title>

    <script>
        var xmlhttp;
        var jsonObject;

        // code for IE7+, Firefox, Chrome, Opera, Safari
        if (window.XMLHttpRequest)
        {
            xmlhttp=new XMLHttpRequest();
        }
        // code for IE6, IE5
        else
        {
            xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");
        }

        xmlhttp.onreadystatechange=function()
        {
            if (xmlhttp.readyState==4 && xmlhttp.status==200)
            {
                jsonObject = JSON.parse(xmlhttp.responseText);
                alert(jsonObject.balance);                       
            }
        }

        xmlhttp.open("GET","categories.json",true);
        xmlhttp.send();
    </script>
</head>

<body>
    Read JSON Demo
</body>
</html>

JSON file :

{"balance":1000.21,"num":100,"nickname":null,"is_vip":true,"name":"foo"}

Problem

I have to read a JSON file from folder that is located in a project. I am using the following code: ``` var obj = "www/places.json"; ``` How can I read a JSON file located in project folder `www` in iPhone PhoneGap using Javascript?

Original source