JSON output pre tag

HTML

<pre id="jsonn"></pre>
###

JavaScript

var data = {
    "data": {
        "x": "2",
        "y": "1",
        "url": "http://url.com"
    },
    "event": "start",
    "show": 1,
    "id": 50
}


document.getElementById("json").innerHTML = JSON.stringify(data, undefined, 2);