如何在Mapbox图层切换中使featureLayer处于非活动状态？

Question

我有一个featureLayers和tileLayers的简单图层切换。仅在featureLayers关闭时，切换按钮仍然有效。我查看了参考文档，但看不出为什么只有featureLayer无法正常工作：

Map demo

 var baseLayer = new L.mapbox.tileLayer('mapster.l4b4kjoi');
 this.className == 'active';
var ui = document.getElementById('map-ui');

var future = L.mapbox.featureLayer('mapster.l4pda0e3');
var demand = L.mapbox.featureLayer('seamap.l50l5ecd');
var historic = L.mapbox.featureLayer('mapster.l4pda0e3');
var navwater = L.mapbox.tileLayer('mapster.ydvyqcpm');
var coasturban = L.mapbox.tileLayer('mapster.znl98dfb');



addLayer(future, L.mapbox.gridLayer('mapster.l4pda0e3'),'Future Projects', 4);
addLayer(demand, L.mapbox.gridLayer('seamap.l50l5ecd'),'Current Read-Mix Demand', 4); 
addLayer(historic, L.mapbox.gridLayer('mapster.l4pda0e3'),'Historic Read-Mix Use', 4);
addLayer(navwater, L.mapbox.gridLayer('mapster.ydvyqcpm'),'Navigable Waterways', 3);
addLayer(coasturban, L.mapbox.gridLayer('mapster.znl98dfb'),'Coastal Urban', 4);


function addLayer(layer, gridlayer, name, zIndex) {
    layer
        .setZIndex(zIndex)

    gridlayer
    // add the gridControl to the active gridlayer
    var gridControl = L.mapbox.gridControl(gridlayer, {follow: true}).addTo(map);

    // Create a simple layer switcher that toggles layers on and off.
    var item = document.createElement('li');
    var link = document.createElement('a');

    link.href = '#';

     link.innerHTML = name;

link.onclick = function(e) {
    e.preventDefault();
    e.stopPropagation();

   if ($(this).text() == 'Toggle All Off') {
        map.eachLayer(function (layer) {
         map.removeLayer(layer);
         map.legendControl.removeLegend(layer.getTileJSON().legend);
        });
        this.className = '';
        map.addLayer(baseLayer);
    } else
    if (map.hasLayer(layer)) {
        map.removeLayer(layer);
        map.removeLayer(gridlayer);
        // you had "thelayer", but it should be "layer":
        map.legendControl.removeLegend(layer.getTileJSON().legend);
        // change two lines that were here to the following:
        this.className = '';
    } else {
        map.addLayer(layer);
        map.addLayer(gridlayer);
        this.className = 'active';
        map.legendControl.addLegend(layer.getTileJSON().legend);

    }


};
    item.appendChild(link);
    ui.appendChild(item);
}