How to pause on requestAnimationFrame(render)?

Question

JavaScript

Hello, how to pause on requestAnimationFrame(render) ?
So that when you click on the button -\u003e
<div id="pause_btn" onclick="pause();"></div>

window.pause = function(){
  window.stopgame = !window.stopgame
}

Answer 1

requestAnimationFrame(function() {
    if(!window.stopgame) render();
});

ps to hang variables on window is not comme il faut