conditionally state update inside rAF

Author: sagiv.bengiat

package.json

@@ -25,7 +25,6 @@
     "test:watch": "react-scripts test --env=jsdom",
     "prebuild": "yarn run lint:fix",
     "build": "rollup -c",
-    "prepare": "yarn run build",
     "build-doc": "docz build",
     "deploy-doc": "gh-pages -d demo"
   },

src/react-elastic-carousel/components/Carousel.js

@@ -206,7 +206,11 @@ class Carousel extends React.Component {
       // go back from 0ms to whatever set by the user
       // We were at 0ms because we wanted to disable animation on resize
       // see https://github.com/sag1v/react-elastic-carousel/issues/94
-      window.requestAnimationFrame(() => this.setState({ transitionMs }));
+      window.requestAnimationFrame(() => {
+        if (this.isComponentMounted) {
+          this.setState({ transitionMs });
+        }
+      });
       return {
         sliderPosition,
         activeIndex: newActiveIndex < 0 ? 0 : newActiveIndex