tested log scale

inst/htmlwidgets/js/layout.js

@@ -330,8 +330,12 @@ function getJitterSpec(spec) {
       })
     }
 
-    encoding.y.scale = {
-      domain: yExtent
+    if (encoding.y.scale) {
+      encoding.y.scale.domain = yExtent
+    } else {
+      encoding.y.scale = {
+        domain: yExtent
+      }
     }
 
     encoding.x.scale = {

inst/htmlwidgets/test/index.html

@@ -181,8 +181,10 @@
       let app1 = null;
 
       d3.json(
-        `${base}/custom-animations-${animationType}-R.json`
+        // `${base}/custom-animations-${animationType}-R.json`
+        'https://raw.githubusercontent.com/microsoft/datamations/scales-transform/sandbox/mutations/mutate-scale-R.json'
       ).then(specs => {
+        window.rawSpecs = JSON.parse(JSON.stringify(specs));
         app1 = App("app", { specs, frameDur: 3000 });
       });
     </script>