planning

node_modules/@mapbox/mapbox-gl-style-spec/migrate/v9.js

@@ -0,0 +1,26 @@
+
+import deref from '../deref.js';
+
+function eachLayer(style, callback) {
+    for (const k in style.layers) {
+        callback(style.layers[k]);
+    }
+}
+
+export default function(style) {
+    style.version = 9;
+
+    // remove user-specified refs
+    style.layers = deref(style.layers);
+
+    // remove class-specific paint properties
+    eachLayer(style, (layer) => {
+        for (const k in layer) {
+            if (/paint\..*/.test(k)) {
+                delete layer[k];
+            }
+        }
+    });
+
+    return style;
+}