From 9e5feb2ca327de569450ccf50067263398ab5c60 Mon Sep 17 00:00:00 2001
From: Krzysztof Borowy <Krizzu@users.noreply.github.com>
Date: Wed, 21 Jun 2017 20:34:14 +0200
Subject: [PATCH] Moved propTypes checking, fixed undefined error (#2464)

---
 examples/counter/src/components/Counter.js | 18 ++++++++++++------
 1 file changed, 12 insertions(+), 6 deletions(-)

diff --git a/examples/counter/src/components/Counter.js b/examples/counter/src/components/Counter.js
index 344a7d9d71..052f02bf07 100644
--- a/examples/counter/src/components/Counter.js
+++ b/examples/counter/src/components/Counter.js
@@ -2,19 +2,19 @@ import React, { Component } from 'react'
 import PropTypes from 'prop-types'
 
 class Counter extends Component {
-  static propTypes = {
-    value: PropTypes.number.isRequired,
-    onIncrement: PropTypes.func.isRequired,
-    onDecrement: PropTypes.func.isRequired
+  constructor(props) {
+    super(props);
+    this.incrementAsync = this.incrementAsync.bind(this);
+    this.incrementIfOdd = this.incrementIfOdd.bind(this);
   }
 
-  incrementIfOdd = () => {
+  incrementIfOdd() {
     if (this.props.value % 2 !== 0) {
       this.props.onIncrement()
     }
   }
 
-  incrementAsync = () => {
+  incrementAsync() {
     setTimeout(this.props.onIncrement, 1000)
   }
 
@@ -44,4 +44,10 @@ class Counter extends Component {
   }
 }
 
+Counter.propTypes = {
+  value: PropTypes.number.isRequired,
+  onIncrement: PropTypes.func.isRequired,
+  onDecrement: PropTypes.func.isRequired
+}
+
 export default Counter