title: What polyfills are needed from polyfill.io to run Blazor in IE 11?
body: <p>The <a href="https://docs.microsoft.com/en-us/aspnet/core/blazor/supported-platforms?view=aspnetcore-3.1" rel="nofollow noreferrer">Microsoft Docs</a> point to <a href="https://polyfill.io/v3/" rel="nofollow noreferrer">polyfill.io</a> to allow Blazor to run in IE 11.</p>
  
  <p>All searching for an answer to this question lead me to <a href="https://github.com/Daddoon/Blazor.Polyfill" rel="nofollow noreferrer">Daddoon/Blazor.Polyfill</a>. However, for licensing reasons, we are not allowed to use this solution.</p>
  
  <p>So my question is: what polyfills are needed from the <a href="https://polyfill.io/v3/url-builder/" rel="nofollow noreferrer">polyfill.io builder</a> to run Blazor in IE 11?</p>