title: "Save to Drive" buttons can/need to be cleaned up manually?
body: <p>Using <a href="https://developers.google.com/drive/api/v3/savetodrive#javascript_api" rel="nofollow noreferrer">https://developers.google.com/drive/api/v3/savetodrive#javascript_api</a>
  In a VueJS app, like:</p>
  
  <p>In <code>index.html</code></p>
  
  <pre><code>&lt;script type="text/javascript"&gt;
    window.___gcfg = {
      parsetags: 'explicit',
      lang: 'en-US'
    };
  &lt;/script&gt;
  &lt;script src='https://apis.google.com/js/platform.js' async defer&gt;&lt;/script&gt;
  </code></pre>
  
  <p>In a component:</p>
  
  <pre class="lang-js prettyprint-override"><code>export default {
    mounted() {
      window.gapi.savetodrive.go(`savetodrive-${this.id}`);
    },
  }
  </code></pre>
  
  <p>The "Save to drive" buttons are rendered correctly, but on navigating away from the component (when the HTML element gets removed from the DOM), I start getting a lot of exceptions in the console (one per each button x times rendered):</p>
  
  <pre><code>Uncaught DOMException: Blocked a frame with origin "https://drive.google.com" from accessing a cross-origin frame.
      at Object.nz [as kq] (https://apis.google.com/_/scs/apps-static/_/js/k=oz.gapi.en.xh-S9KbEGSE.O/m=gapi_iframes,gapi_iframes_style_common/rt=j/sv=1/d=1/ed=1/am=wQc/rs=AGLTcCNaUSRWzhd71dAsiMVOstVE3KcJZw/cb=gapi.loaded_0:150:257)
      at jz.send (https://apis.google.com/_/scs/apps-static/_/js/k=oz.gapi.en.xh-S9KbEGSE.O/m=gapi_iframes,gapi_iframes_style_common/rt=j/sv=1/d=1/ed=1/am=wQc/rs=AGLTcCNaUSRWzhd71dAsiMVOstVE3KcJZw/cb=gapi.loaded_0:148:261)
      at Fz (https://apis.google.com/_/scs/apps-static/_/js/k=oz.gapi.en.xh-S9KbEGSE.O/m=gapi_iframes,gapi_iframes_style_common/rt=j/sv=1/d=1/ed=1/am=wQc/rs=AGLTcCNaUSRWzhd71dAsiMVOstVE3KcJZw/cb=gapi.loaded_0:152:349)
      at https://apis.google.com/_/scs/apps-static/_/js/k=oz.gapi.en.xh-S9KbEGSE.O/m=gapi_iframes,gapi_iframes_style_common/rt=j/sv=1/d=1/ed=1/am=wQc/rs=AGLTcCNaUSRWzhd71dAsiMVOstVE3KcJZw/cb=gapi.loaded_0:152:259
  </code></pre>
  
  <p>Is there something I'm missing? Something else I need to take care of when destroying the view?</p>
  
  <p>Note that the filepath for the button is under the same server, the path is specified as relative, so there's no CORS involved for downloading the file, everything works ok, the only issue I have is the JS errors.</p>