To delete a layer with CMaps Analytics JS API you can define the layer index for which you would like to remove. The following example code illustrates a function called deleteLayer2 which removes the first layer in the map. Then we have a button that triggers the function.
function deleteLayer2(){ cMap.removeLayer(1); } </script> </head> <body onload="buildMap();"> <div> <button id="btnDelLyr" onclick="deleteLayer2()">Delete Layer 2</button> <div id="mapDiv" style="position:relative;height:500px;width:500px;"></div> </div>