Add a title to leaflet layers control

Question

Does anyone have a method for adding a title to a leaflet layers control? Just a line of text, for example "Available layers." Ideally I'd like to add a link to the text as well.

I thought it would be simple, but I haven't been able to find a solution. I tried methods similar to this question (radio button/checkbox remains after adding "dummy" layer) and this question (adds div to end of layers, seems more complex than my needs). Unfortunately with my experience level, I haven't been able to connect the dots. Any suggestions?

Answer 1

Input Elements in Layer Control are present under

.leaflet-control-layers-overlays

$(".leaflet-control-layers-overlays").prepend("<label>Available layers</label>"); You can also assign a class and add some styling on this. This is not good solution but hope it helps you.

Answer 2

#Leaflet1.7
Here is the vanilla JS minimal solution.

// 0. Your's WMS layers:      
var fooLayers = {
      "Aaa" : ign_ari,
      "Bbb" : ign_cri,
      "Ccc" : ign_grvi
};

// 1. start with Control
var fooLegend = L.control({position: 'topleft'});

fooLegend.onAdd = function () {
      var div = L.DomUtil.create('div');
      // here is Your part:
      div.innerHTML = '<span class='your-class'>Your Title Text</span>';
      return div;
};
fooLegend.addTo(map);

var fooCtrl = L.control.layers(fooLayers, null,
              {collapsed : false, position: 'topleft'})
              .addTo(map);

//
// Nothing unusual, until now:
var fooCtrlDiv = fooCtrl.getContainer();
fooCtrlDiv.insertBefore(fooLegend.getContainer(), fooCtrlDiv.firstChild);

Answer 3

Leaflet 1.7: Addition to @Mruk's answer: If you want to use collapsed: true, then you have to dig a little bit deeper in the DOM tree:

const fooCtrlDiv = fooCtrl.getContainer();

fooCtrlDiv
  .querySelector('.leaflet-control-layers-list')
  .insertBefore(
    fooLegend.getContainer(),
    layerControlDiv.querySelector('.leaflet-control-layers-list').firstChild
  );

Answer 4

You can assign a title attribute to the control. Here's an obviously incomplete snippet from a current project:

// Add settings button
var atlasMapSettings = L.Control.extend({
  options: {
    position: 'topleft' 
  },
  onAdd: function (map) {
    var control = L.DomUtil.create('div', 'leaflet-bar leaflet-control leaflet-control-custom atlas-settings-control closed');
    var icon    = L.DomUtil.create('div', 'fa fa-gear closed', control);
    var content = L.DomUtil.create('div', 'control-content empty', control);

    $(icon).attr('title', 'Map settings');

Answer 5

Leaflet 1.9.4 & Angular

const baseLayers: LayersObject = {};
const overlays: LayersObject = {};
const layerControl: Control.Layers = control.layers(baseLayers, overlays);
layerControl.addTo(this.map);

// Important: getContainer only returns a value when called after addTo(map)
const container: HTMLElement | undefined = layerControl.getContainer();
if (!container) return;
const h5 = document.createElement('h5');
h5.textContent = 'My Title';
container.prepend(h5);