how to parse data from json file using java script

Question

how to parse data from json file using java script?

how to parse data from json file using java script i Got only empty alert box in json file.how to retreive full content of json file data

<select onchange="calTest()" id="sle">
    <option>Peter</option>
    <option>Zara</option>
    <option>one</option>
</select>
<input type="text" id="txt">
<!-- http://jsfiddle.net/ifaour/S4YYk/1/ -->

<!-- http://ajax.googleapis.com/ajax/libs/jquery/1.11.2/jquery.min.js -->
<script src="jquery.js"></script>
<script>
    function calTest() {
        var aname = document.getElementById("sle").value;

        var json = "";

        $.getJSON("test/test.json", function(data) {
            json = data;

        });
        alert(json);
        $.each(json, function(i, v) {

            if (v.name == aname) {
                document.getElementById("txt").value = v.age;
                alert(v.age);
                return;
            }
        });

    }
</script>

Java is to javascript as ham is to hamster, I edited to remove the Java tag :) — NiziL
– NiziL, Commented Feb 11, 2015 at 13:58
possible duplicate of How to return the response from an Ajax call? — user1864610
– user1864610, Commented Feb 11, 2015 at 13:59

Cracker0dks · Accepted Answer · 2015-02-11 14:00:38Z

2

$.getJSON is async that means it is called after the alert... so json is still empty.

Try

$.getJSON("test/test.json", function(data) {
      json = data;
      alert(json);
});

answered Feb 11, 2015 at 14:00

Cracker0dks

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