ruby on rails，javascript块继续在每个页面加载

I was doing a rails project and I added a small piece of 3rd party javascript which generated a button to my html.erb file in view, then I deleted it. However, the javascript (of course the button) keeps loading even if the source code didn't have that block. And more, whenever I created a controller/action, when I visit the page, the button will show up. Could anyone help me with that?I was doing a rails project and I added a small