title: Make TSLint follow my rules in JS files
body: <p>I'm using TSLint within Visual Studio Code (via the TSLint extension), and it's great for <code>.ts</code> files.  It also runs on <code>.js</code> files, which is good, but it does not use the same rules, which is bad (for me).  How can I make it use the same rules?</p>
  
  <p>My <code>tslint.json</code> looks like this:</p>
  
  <pre><code>{
    "extends": "tslint:latest",
    "rules": {
      "indent": [true, "tabs"],
      // a bunch of others
    }
  }
  </code></pre>
  
  <p>And for example, I'm getting this warning in a <code>.js</code> file:</p>
  
  <pre><code>[tslint] space indentation expected (indent)
  </code></pre>
  
  <p>(It wants me to use space indentation, when my rules are set up for <code>"tabs"</code>.)</p>