javascript - Leaflet custom info control update with extra parameters

I used custom info control to show information.The below code is working:

var info = L.control();

info.onAdd = function (map) {
    this._div = L.DomUtil.create('div', 'info'); 
    this.update();

    return this._div;
};

info.update = function (props) {
    this._div.innerHTML = '
US Population Density
' +  (props ?
        '' + props.name + '
' + props.density + ' people / mi2'
        : 'Hover over a state');
};

info.addTo(map);

and using info.update in highlightFeature and resetHighlight methods

function highlightFeature(e) {
    ...
    info.update(layer.feature.properties);
}

function resetHighlight(e) {
    ...
    info.update();

}

But I refactor the code and I separated the logic to different classes.So in info.update method,I should use some extra parameters.In this case,I easily can call with other parameters info.update in highlightFeature and resetHighlight methods.But in

info.onAdd = function (map) {
        this._div = L.DomUtil.create('div', 'info'); 
      //  this.update();
        return this._div;
    };

I did not use this.update(); in info.onAdd ,so 'Hover over a state' text does not display. When I use this.update() like that

info.onAdd = function (map) {
            this._div = L.DomUtil.create('div', 'info'); 
            this.update();
            return this._div;
        };

info.update = function (props,param1) {
.......
}

I got the error param1 is undefined.How to achieve this?Is there any way to call info.update with extra parameters in info.onAdd?