I am trying to change the zoom to bounds leaflet map :

this is my code :

 map.setMaxBounds(map.getBounds());
    let mapBounds = L.latLngBounds([
        [16.3980555556, -26.63],
        [5.31277777778, -28.1236111111],
    ]);
    map.fitBounds(mapBounds, {padding: [100,100] ,// zoom  });

the point is there :

map.fitBounds(mapBounds, {padding: [100,100] ,// zoom  ​});

how can I add zoom in leaflet map?