Check nodeType before attempting to highlight. (facebook#361)

Since React v15 uses comment nodes to split text (rather than <span>s), this fixes a crashing bug.

Author: STRML

frontend/Highlighter/Overlay.js

@@ -84,6 +84,11 @@ class Overlay {
  }
 
  inspect(node: DOMNode, name?: ?string) {
+ // We can't get the size of text nodes or comment nodes. React as of v15
+ // heavily uses comment nodes to delimit text.
+ if (node.nodeType !== Node.ELEMENT_NODE) {
+ return;
+ }
  var box = node.getBoundingClientRect();
  var dims = getElementDimensions(node);
 

frontend/types.js

@@ -28,6 +28,7 @@ export type DOMNode = {
  innerHTML: string,
  innerText: string,
  nodeName: string,
+ nodeType: number,
  offsetHeight: number,
  offsetLeft: number,
  offsetParent: ?DOMNode,