title: how to blink button with angularJs
body: <p>I am developing angularJs SPA application. My front end html page has a button upon clicking it waits for the operation to be completed. I would like user to notify that operation is in progress. Until the operation completes I am thinking of blinking the button or text on the button or any other approach that people might be using for the given scenario. 
  I am open for suggestions like spinners on the button or anything that conveys user the correct state. </p>