title: How to do React forceUpdate() to a child component?
body: <p>I can <strong>force reload</strong> for a parent component with <code>this.forceUpdate()</code>, but how to do it for a child component?</p>
  
  <p>i.e. following react class methods:</p>
  
  <pre><code>buttonClick = () =&gt; {
     //This updates parent (this) component
     this.forceUpdate(); 
  
    //This causes runtime error ("..not a function in buttonClick...")
     Rtable.forceUpdate();
  }
  
  render () {
    &lt;div&gt;
       &lt;RTable /&gt;
    &lt;/div&gt;
  }
  </code></pre>