Using anonymous functions prevented proper unsubscription from listening to events, which was a memory leak. Using point-free style for handleResize function now

Author: camflan

src/components/Resizable.js

@@ -23,12 +23,12 @@ export default class Resizable extends React.Component {
     }
 
     componentDidMount() {
-        window.addEventListener("resize", () => this.handleResize());
+        window.addEventListener("resize", this.handleResize);
         this.handleResize();
     }
 
     componentWillUnmount() {
-        window.removeEventListener("resize", () => this.handleResize());
+        window.removeEventListener("resize", this.handleResize);
     }
 
     handleResize() {