How to reset a leaflet map after a case in JS

Hi, i have the following problem: I have a map in leaflet linked to a change function in jquery, depending on the ID that I receive in the “select” of the previous query, the case is entered below in JS:

//First the map
var map = L.map('map').setView([XXXX, XXXXX], 12);

L.tileLayer('http://{s}.tile.openstreetmap.org/{z}/{x}/{y}.png', {
    attribution: 'Map data &copy; <a href="http://openstreetmap.org">OpenStreetMap</a> contributors, <a href="http://creativecommons.org/licenses/by-sa/2.0/">CC-BY-SA</a>, Imagery © <a href="http://cloudmade.com">CloudMade</a>',
    minZoom: 12,
    maxZoom: 100
}).addTo(map);

function popup(feature, layer) {
    if (feature.properties && feature.properties.COMUNA)
    {
        layer.bindPopup( "<strong>" + "INF.EX: " + "</strong>" + feature.properties.INF);
    }
};
//Finish the map
//Start the CASE
    $("body").on("change", "[name=EXAMPLE]", function ()
    {
        var NUM = $('#EXAMPLE').val();
        switch (NUM) {
            case '1':
                map.setView([XXXX, XXXX], 15,{
                    animate: true
                });

                var examplemap= L.geoJson(EXAMPLE_01, {
                    onEachFeature: popup
                });

                L.geoJson(EXAMPLE01).addTo(map);
                examplemap.addTo(map);
            break;
            case '2':
                map.setView([XXXX, XXXX], 15,{
                    animate: true
                });

                var examplemap= L.geoJson(EXAMPLE_02, {
                    onEachFeature: popup
                });

                L.geoJson(EXAMPLE02).addTo(map);
                examplemap.addTo(map);
            break;
}});

At the moment of choosing another case (Stored in a select in HTML ) the data that the first case that I have chosen gave me is still stored in the map, how could I get these data that are in the map to be deleted so that Does the other case apply?

If there is a need for another part of the code or if there is any inconsistency, you can tell me, thanks!

Answer

To reset everything on your map you can use the eachLayer method of your map, to remove all layers previously added:

map.eachLayer((layer) => {
  layer.remove();
});

[EDIT] To only delete a specific layer, you need to keep track of it:

var map = L.map('map').setView([XXXX, XXXXX], 12);
var myLayer = new L.LayerGroup();
myLayer.addTo( map );
[...]
$("body").on("change", "[name=EXAMPLE]", function () {
[...]
switch (NUM) {
   case '1':
      [...]
      // remove everything from your layer (you should move this to a function)
      myLayer.eachLayer((layer) => {
        layer.remove();
      });
      // and then instead of adding to your map, add the layer to your    myLayer
      examplemap.addTo(myLayer);
      break;
      [...]
    // Same thing in the other case(s)
[...]