title: How to add props to a component instance in React.js?
body: <p>I would like to know if it is posible to add a new prop to a component instance, the component instance look like this:</p>
  
  <p><a href="https://i.stack.imgur.com/oRuNm.png" rel="noreferrer"><img src="https://i.stack.imgur.com/oRuNm.png" alt="enter image description here"></a></p>
  
  <p>Maybe is a bad practice modifying a component instance directly, but I wonder if it is possible or not.</p>