Motivation

The WCAG 2.1 SC 2.5.5 Target Size requires targets for pointer input to be at least 44 by 44 in CSS pixels. Meeting this requirement has multiple benefits, it'd be great to pass this criteria for Leaflet controls.

Edit: WCAG 2.2 (though it should be noted that the 2.2 version has not reached Recommendation status yet) has a more forgiving (from a designer's point of view!) Success Criterion: 2.5.8 Target Size (Minimum) which instead requires these targets to be at least 24 by 24 in CSS pixels.

Proposed solution

Increase the size of the following controls to 44x44 px (or 24x24 per WCAG 2.2 SC 2.5.8).

• General controls:
  

  Leaflet/dist/leaflet.css

  Lines 284 to 286 in 0f904a5

  	width: 26px;
  	height: 26px;
  	line-height: 26px;

  
  
• Markers:
  

  Leaflet/src/layer/marker/Icon.Default.js

  Line 26 in bc918d4

  iconSize: [25, 41],

  
  (Changing the marker's width and height to 44px would cause it to stretch. Either the image would need to be modified or padding (right and left) could be modified to achieve a 44 by 44 px target.)
  
  
• Popup's Close button:
  

  Leaflet/dist/leaflet.css

  Lines 517 to 518 in 0f904a5

  	width: 18px;
  	height: 14px;

Additional context

Increasing the default size of controls would also have the benefit of not needing extra CSS for conditional leaflet-touch sizing (presumably, since the controls would be large enough by default). For example, the following lines could be removed: