Set active layer on layer control added to map

[Addam Hardy]

Hi all, 

I'm unable to find a method (or an initialization option) to select a layer as active when you add a control to a map. Everything else is working great. The control is added and then I can select a base layer to display, but I would really like to have one of them pre-selected on load. Code and screenshot below. 

Thanks for your help

Addam Hardy

      var positive = L.heatLayer(positive_points, {radius: 20});

      var negative = L.heatLayer(negative_points, {radius: 20});

      var point_group = L.layerGroup();

      var overlays = {

          "Positive": positive,

          "Negative": negative,

          "Color Points": point_group

      };

     this.control = L.control.layers(overlays, null,{collapsed: false}).addTo(mapObject);

[Historical Atlas]

Hello,

You just need to add it either
a) while creating your map object with the layers option, or
b) add it after map object creation
example:
a) map = L.map(...
     layers: [positive],
...);
or
b) map.addLayer(positive)

As you might have guessed you can add as many layers as you wish...

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[Addam Hardy]

I would have bet money that I tried that without success… but just worked straight away with your method so I guess I had not tried it. :) Thanks for your time!

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