title: What does the html-webpack-plugin mean when it says "hash in the filename"?
body: <p>I feel like the word hash gets used in so many different places and can mean different things....</p>
  
  <ol>
  <li>What is an html template with a hash in the file name?</li>
  </ol>
  
  <blockquote>
    <p>This is a webpack plugin that simplifies creation of HTML files to
    serve your webpack bundles. This is especially useful for webpack
    bundles that include a hash in the filename which changes every
    compilation. You can either let the plugin generate an HTML file for
    you, supply your own template using lodash templates or use your own
    loader.</p>
  </blockquote>
  
  <p>source: <a href="https://github.com/ampedandwired/html-webpack-plugin" rel="nofollow">https://github.com/ampedandwired/html-webpack-plugin</a></p>
  
  <p><em>As a minor follow-up question</em>, <strong>is there a universal definition of a "hash"?</strong> </p>
  
  <p>I've seen it used talking about cookies, URLs, authentication, in redis and data structures (e.g. hash tables)... is there any method to this madness or is it just a popular word that people decide to use when naming anything they do? I've tried to do some research on this myself but its widespread use in so many situations has made it hard to google exactly what I'm wondering about.</p>