Minify SVG images and add rules for High Contrast mode on Windows

.stylelintrc

@@ -5,6 +5,9 @@
     "declaration-block-semicolon-newline-after": "always-multi-line",
     "block-opening-brace-space-before": "always-multi-line",
     "declaration-block-single-line-max-declarations": 3,
-    "selector-class-pattern": "mapboxgl-[a-z-]+"
+    "selector-class-pattern": "mapboxgl-[a-z-]+",
+    "at-rule-no-unknown": [true, {
+      "ignoreAtRules": ["svg-load"]
+    }]
   }
 }

debug/debug.html

@@ -52,6 +52,7 @@
     }
 }));
 map.addControl(new mapboxgl.ScaleControl());
+map.addControl(new mapboxgl.FullscreenControl());
 
 map.on('load', function() {
     map.addSource('geojson', {

postcss.config.js

@@ -1,6 +1,16 @@
 module.exports = {
     plugins: [
         require('postcss-inline-svg'),
-        require('cssnano')
+        require('cssnano')({
+            preset: ['default', {
+                svgo: {
+                    plugins: [{
+                        removeViewBox: false
+                    }, {
+                        removeDimensions: false
+                    }],
+                },
+            }],
+        }),
     ]
 }