ajax JQ Service

var parseConfig;
var yourobj = {
    _otherMethod: function() {
        var text = this._requestText();
    },
    _requestText: function() {
        var url = 'config.json';
        $.ajax({
            type: 'GET',
            url: url,
            async: false,
            dataType: 'json',
            success: function(data) {
                parseConfig = data;
            }
        });
    }
};
yourobj._requestText();
console.log(parseConfig);