--- a/devtools/client/inspector/animation/components/graph/SummaryGraphPath.js
+++ b/devtools/client/inspector/animation/components/graph/SummaryGraphPath.js
@@ -150,29 +150,29 @@ class SummaryGraphPath extends Component
     const {
       animation,
       emitEventForTest,
       getAnimatedPropertyMap,
       timeScale,
     } = props;
 
     let animatedPropertyMap = null;
+    let thisEl = null;
 
     try {
       animatedPropertyMap = await getAnimatedPropertyMap(animation);
+      thisEl = ReactDOM.findDOMNode(this);
     } catch (e) {
       // Expected if we've already been destroyed or other node have been selected
       // in the meantime.
       console.error(e);
       return;
     }
 
     const keyframesList = this.getOffsetAndEasingOnlyKeyframes(animatedPropertyMap);
-
-    const thisEl = ReactDOM.findDOMNode(this);
     const totalDuration = timeScale.getDuration() * animation.state.playbackRate;
     const durationPerPixel = totalDuration / thisEl.parentNode.clientWidth;
 
     this.setState(
       {
         durationPerPixel,
         isStateUpdating: false,
         keyframesList