title: NPM - JavaScript Import/Concat/Compile ( like SCSS )
body: <p>I'm searching a npm tool to buil my JS files, something like SCSS where i have the main file with imports.
  The main goal is to create a BAT file to use in PhpStorm file watcher to auto-compile my js files.</p>
  
  <p>For example with this files :</p>
  
  <pre><code>app/
     _main.js
     _utilities.js
  app.js
  </code></pre>
  
  <p>app.js, somethin like :</p>
  
  <pre><code>@import "app/_utilities.js";
  @import "app/_main.js";
  </code></pre>
  
  <p>the final file should be the compilation of the 2 subfiles.</p>
  
  <p>Hope i can have some help.
  thanks!</p>