Echo JS 0.11.0

Completely agreed... I have the following (roughly) at the top of my scripts in current applications (IE is the main browser that doesn't support the features in question).

async functions and fetch...

    try {
      eval('(function() { async _ => _; })();');
      if (typeof fetch === 'undefined') {
        throw new Error('no fetch');
      }
    } catch (e) {
      window.location.replace('/legacy.html');
    }