title: AOT (Ahead-Of-Time) Compilation with ES5
body: <p>Is it possible to do AOT compilation in Angular using only ES5?</p>
  
  <p>More to the point, can I use the <a href="https://github.com/angular/angular-cli/tree/master/packages/%40ngtools/webpack" rel="noreferrer">NGTools Webpack plugin</a> with ES5?</p>
  
  <p>I know TypeScript is the preferable language of choice for Angular, however my place of employment did not approve using TypeScript for our Angular project.  My hands are a bit tied, and I don't want performance to suffer on the client due to this.</p>
  
  <p><strong>Some relevant info on my project:</strong></p>
  
  <ul>
  <li>Webpack 2 for build/packaging</li>
  <li>Written in ES2015 transpiled to ES5 using Babel</li>
  </ul>
  
  <p>I have looked all over and have not been able to find a clear answer on this, I would really appreciate any info anyone can provide.</p>
  
  <p>Thanks in advance!</p>