如何在传单地图上的开/关标记上添加按钮？

Question

我在单张地图上添加用于添加/删除标记的功能时遇到问题。我阅读并尝试了许多不同的代码，但是我不了解如何删除精确类型的所有标记。我的代码是这样的：

var map_var =L.map('map_id').setView([45.4642700,  9.1895100], 16);

L.tileLayer('https://{s}.tile.openstreetmap.org/{z}/{x}/{y}.png', {
    attribution: '&copy; <a href="https://www.openstreetmap.org/copyright">OpenStreetMap</a> contributors'
}).addTo(map_var);

sidebar = L.control.sidebar('helpsidebar', { position: 'right' });
sidebar.addTo(map);

Button1 = new L.Control.Button(L.DomUtil.get('bike'), { toggleButton: 'active' });
Button1.addTo(map);
Button1.on('click', function () {
    if (bike.isToggled()) {
        sidebar.hide(
        for(i=0;i<marker_bike.length;i++) {
            map.removeLayer(marker_bike[i]);
            } );
    } else {
        sidebar.show(marker_bike.addTo(map_var))
    }
});

var bike = $.getJSON( "./static/bike_coordinate.json", function(json1) {
           for (var i = 0; i < json1.length; i++) {
            var place = json1[i];
            console.log( place );
               // Creating a marker and putting it on the map
            var customIcon = L.icon({
            iconUrl: './static/bike_share.png',
            iconSize:     [38, 40], // size of the icon
            iconAnchor:   [10, 40], // point of the icon which will correspond to marker's location
            popupAnchor:  [5, -40] // point from which the popup should open relative to the iconAnchor
            }); 
            var marker_bike = L.marker(place.coordinate, {icon: customIcon});
            if (marker_bike != null){
                marker_array.push(marker_bike);
                marker_bike.addTo(map_var).bindPopup(place.Indirizzo);
                } else{$('#bike').text = "Error"}
            }

    });


    var ferrovia = $.getJSON( "./static/train.json", function(json2) {
           for (var i = 0; i < json2.length; i++) {
            var place = json2[i];
            console.log( place );
               // Creating a marker and putting it on the map
            var customIcon = L.icon({
            iconUrl: './static/train.png',
            iconSize:     [38, 40], // size of the icon
            iconAnchor:   [10, 40], // point of the icon which will correspond to marker's location
            popupAnchor:  [5, -40] // point from which the popup should open relative to the iconAnchor
            }); 
            var marker_train = L.marker(place.coordinate, {icon: customIcon});
            if (marker_train != null){
                marker_array.push(marker_train);
                marker_train.addTo(map_var).bindPopup(place.Indirizzo);
                }
            else{$('#ferrovia').text = "Error"}
            }

    });

当我编写按钮的代码时，所有地图都消失了。 我想添加一个按钮以供用户单击，然后显示或不显示精确类型的标记（共3个按钮）。

编辑：我也尝试过此代码，但是它不起作用：

var map_var =L.map('map_id').setView([45.4642700,  9.1895100], 16);
console.log('a')
L.tileLayer('https://{s}.tile.openstreetmap.org/{z}/{x}/{y}.png', {
    attribution: '&copy; <a href="https://www.openstreetmap.org/copyright">OpenStreetMap</a> contributors'
}).addTo(map_var);

var group1 = L.featureGroup();
var group2 = L.featureGroup();
var group3 = L.featureGroup();

var bike = $.getJSON( "./static/bike_coordinate.json", function(json1) {
           for (var i = 0; i < json1.length; i++) {
            var place = json1[i];
            console.log( place );
               // Creating a marker and putting it on the map
            var customIcon = L.icon({
            iconUrl: './static/bike_share.png',
            iconSize:     [38, 40], // size of the icon
            iconAnchor:   [10, 40], // point of the icon which will correspond to marker's location
            popupAnchor:  [5, -40] // point from which the popup should open relative to the iconAnchor
            }); 
            var marker_bike = L.marker(place.coordinate, {icon: customIcon});
            if (marker_bike != null){
                //marker_array.push(marker_bike);
                marker_bike.addTo(group1).bindPopup(place.Indirizzo);
                } else{$('#bike').text = "Error"}
            }

    });

    var ferrovia = $.getJSON( "./static/train.json", function(json2) {
           for (var i = 0; i < json2.length; i++) {
            var place = json2[i];
            console.log( place );
               // Creating a marker and putting it on the map
            var customIcon = L.icon({
            iconUrl: './static/train.png',
            iconSize:     [38, 40], // size of the icon
            iconAnchor:   [10, 40], // point of the icon which will correspond to marker's location
            popupAnchor:  [5, -40] // point from which the popup should open relative to the iconAnchor
            }); 
            var marker_train = L.marker(place.coordinate, {icon: customIcon});
            if (marker_train != null){
                //marker_array.push(marker_train);
                marker_train.addTo(group2).bindPopup(place.Indirizzo);
                }
            else{$('#ferrovia').text = "Error"}
            }

    });

var farmacie = $.getJSON( "./static/farmacie.json", function(json3) {
       for (var i = 0; i < json3.length; i++) {
        var place = json3[i];
        console.log( place );
           // Creating a marker and putting it on the map
        var customIcon = L.icon({
        iconUrl: './static/phar.png',
        iconSize:     [35, 37], // size of the icon
        iconAnchor:   [10, 40], // point of the icon which will correspond to marker's location
        popupAnchor:  [5, -40] // point from which the popup should open relative to the iconAnchor
        }); 
        var marker_pha = L.marker(place.coordinate, {icon: customIcon});
        if (marker_pha != null){
            //marker_array.push(marker_pha);
            marker_pha.addTo(group3).bindPopup('FARMACIA '+place.Indirizzo);
            }
        else{$('#farmacie').text = "Error"}
        }

});

map_var.addLayer(group1);
map_var.addLayer(group2);
map_var.addLayer(group3);

$("#bike").click(function(event) {
    event.preventDefault();
    f(map_var.hasLayer(group1)) {
        map_var.addLayer(group1);                 
        $(this).addClass('selected');
    } else {
        $(this).removeClass('selected');
        map_var.removeLayer(group1);
    }
});

$("#train").click(function(event) {
    event.preventDefault();
    if(map_var.hasLayer(group2)) {
        map_var.addLayer(group2);                 
        $(this).addClass('selected');
    } else {
        $(this).removeClass('selected');
        map_var.removeLayer(group2);
    }
});

$("#pharmacy").click(function(event) {
    event.preventDefault();
    if(map_var.hasLayer(group3)) {
        map_var.addLayer(group3);                 
        $(this).addClass('selected');
    } else {
        $(this).removeClass('selected');
        map_var.removeLayer(group3);
   }
});

我想创建类似this的东西。

我是javascript新手，谢谢大家。