title: How to make ESLint include local files?
body: <p>I have a website with simple HTML but lots of javascript code. For that I am trying to use ESLint for the first time.</p>
  
  <p>My html looks like this:</p>
  
  <pre><code>&lt;html&gt;
      . . .
      &lt;body&gt;
          . . .
          &lt;script src="js/someLib.js"&gt;&lt;/script&gt;
          &lt;script src="js/main.js"&gt;&lt;/script&gt;
      &lt;/body&gt;
  &lt;/html&gt;
  </code></pre>
  
  <p>In someLib.js there is a variable "myLibVar" that I use in main.js. It causes this error : </p>
  
  <blockquote>
  <pre><code>'myLibVar' is not defined. (no-undef)
  </code></pre>
  </blockquote>
  
  <p>It is not a node.js app, so I don't use require funtion.
  How can I make ESLint to include someLib.js and prevent those no-undef errors?</p>
  
  <p>Note: I am using VS code to develop code and someLib.js is not one of the popular libraries.</p>