Mapbox GL JS Toggle Layers default to "off"

Question

Using Mapbox's 'Toggle Layer' example, how would I load the map with the "contours" and "museums" layers turned off?

I want the layers to be turned "off" by default and have the user turn "on" the layers.

I've tried replacing

link.className = 'active';

With

link.className = '';

Per this question, but still doesn't work.

Answer 1

Additionally to what you've done replacing

link.className = 'active'; with link.className = '';,

you need to set

'visibility': 'none'

for both layers when adding them to the map:

Example: http://jsbin.com/vosenopedu/edit?html,output