title: How to prevent clicking a button from making other elements become blur?
body: <p>Let's say there is a textarea and a button. 
  <br>
  After clicking the button, the textarea will become blur, but I don't want this. 
  <br>
  I want clicking the button to NOT make the textarea blur.
  <br>
  Could anyone teach me how to do this?
  &lt;>
  Thanks!</p>