title: reactjs - how to switch on and off updates in a child component?
body: <p>I have a ReactJS that uses a child component that updates when it does not need to.</p>
  
  <p>I want to control when that child updates by providing it with my own shouldComponentUpdate function.  Can this be done and how?</p>
  
  <p>Please note the comments below refer to the first version of this question which did not at all reflect the original problem and the solution that the discussion led to.</p>