var buttonContainer = $("<div class='position-relative'>")
.appendTo(baseSection);
- var mapContainer = $("<div class='position-absolute top-0 start-0 bottom-0 end-0 z-0'>")
+ var mapContainer = $("<div class='position-absolute top-0 start-0 bottom-0 end-0 z-0 bg-body-secondary'>")
.appendTo(buttonContainer);
var input = $("<input type='radio' class='btn-check' name='layer'>")