Missing clearTimeout()

I'm getting warning "Can only update a mounted or mounting component. This usually means you called setState() on an unmounted component. This is a no-op. Please check the code for the undefined component." without clearTimeout() in React componentWillUnmount()  method.

Author: deniss-muhla

src/ProgressBar.js

@@ -32,12 +32,18 @@ class ProgressBar extends React.Component {
     if (this.interval) {
       clearInterval(this.interval);
     }
+    if (this.timeout) {
+      clearTimeout(this.timeout);
+    }
   };
 
   componentWillReceiveProps = (nextProps) => {
     if (this.interval) {
       clearInterval(this.interval);
     }
+    if (this.timeout) {
+      clearTimeout(this.timeout);
+    }
 
     if (nextProps.autoIncrement && nextProps.percent >= 0 && nextProps.percent < 99) {
       this.interval = setInterval(this.increment, nextProps.intervalTime);
@@ -47,7 +53,7 @@ class ProgressBar extends React.Component {
       this.setState({
         percent: 99.9
       }, () => {
-        setTimeout(() => {
+        this.timeout = setTimeout(() => {
           this.setState({
             percent: -1
           });