title: ES7, ES8, ES9, ES10, ES11 Browser support
body: <p>Regarding compatibility between ECMAScript specification and actual implementation;</p>
  <p>It is fairly easy to check out the data about <a href="https://caniuse.com/#search=ECMAScript%206" rel="noreferrer">browser support for ECMAScript2015 (ES6)</a>, but I found it pretty difficult to have an equivalently clear table for all the following ES versions (ES7+).</p>
  <p><em>By the time this question is asked:</em></p>
  <ul>
  <li><p>Mozilla has some info <a href="https://developer.mozilla.org/en-US/docs/Archive/Web/JavaScript/ECMAScript_Next_support_in_Mozilla" rel="noreferrer">on their website</a>: it is possible to see that ES7 and ES8 are fully supported, ES9 still has some problems and ES10 is supported on the latest versions.</p>
  </li>
  <li><p>I can also guess that IE11 never progressed after ES5.</p>
  </li>
  <li><p>I did not find anything for the other browsers, just some stolen info here and there.</p>
  </li>
  </ul>
  <p><strong>How can I check what the current browser-support level is?</strong></p>