Carregar dados a partir de JSON

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Esconder código-fonte

/// Load JSON
/// Alert: Não é cross browser
/// Example: loadJSON("assets/json/config.json", function(a){console.log('success',a)}, function(b){console.log('error', b)});
function loadJSON(url, success, error) {
    var xmlhttp = new XMLHttpRequest();
    xmlhttp.onreadystatechange = function () {
        if (xmlhttp.readyState == 4 && xmlhttp.status == 200) {
            try {
                var JSONObject = JSON.parse(xmlhttp.responseText);
                success(JSONObject);
            } catch (e) {
                error(e);
            }
        } else {
            var e = { "readyState": xmlhttp.readyState, "status": xmlhttp.status };
            if ([200, 0].indexOf(xmlhttp.status) == -1 && xmlhttp.readyState == 4) {
                error(e);
            }
        }
    }
    xmlhttp.open("GET", url, true);
    xmlhttp.send();
}