fix: google/blockly#161

On iOS, if I use a pinch gesture in the workspace, these errors appear in the console: Error: Invalid value for <rect> attribute x="NaN"
scratchfoundation · Aug 20, 2015 · 575b712 · 575b712
1 parent 96d5987
commit 575b712
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/core/blockly.js b/core/blockly.js
@@ -294,6 +294,9 @@ Blockly.onMouseUp_ = function(e) {
  * @private
  */
 Blockly.onMouseMove_ = function(e) {
+  if (event.touches && event.touches.length >= 2) {
+    return  // multi-touch gestures won't have e.clientX
+  }
   var workspace = Blockly.getMainWorkspace();
   if (workspace.isScrolling) {
     Blockly.removeAllRanges();