Automat dat +50 clapping on Medium.com

50.js

(() => {
  const up$ = new MouseEvent("mouseup", { bubbles: true });
  const down$ = new MouseEvent("mousedown", { bubbles: true });
  
  const node = document.querySelector(
    `.js-postActionsFooter button[data-action="multivote"]`
  );
  
  let attempts = 0;

  const clap = window.setInterval(() => {
    const countNode = document.querySelector(".js-floatingMultirecommendCount")
    const count = parseInt(
      countNode && countNode.textContent || -1,
      10
    );

    if (count === 50 || attempts > 100) {
      node.dispatchEvent(up$);
      window.clearInterval(clap);
    }
    
    attempts++
  }, 500);

  node.dispatchEvent(down$);
})()

bookmarklet

javascript:(()=>{const a=new MouseEvent("mouseup",{bubbles:!0}),b=new MouseEvent("mousedown",{bubbles:!0}),c=document.querySelector(`.js-postActionsFooter button[data-action="multivote"]`);let d=0;const e=window.setInterval(()=>{const f=document.querySelector(".js-floatingMultirecommendCount"),g=parseInt(f&&f.textContent||-1,10);(50===g||100<d)&&(c.dispatchEvent(a),window.clearInterval(e)),d++},500);c.dispatchEvent(b)})();