title: ReferenceError: System is not defined in java script
body: <p>I am new to ES6.I am trying to run an ES6 web page in browser through <code>index.html</code> file.</p>
  
  <p>The <code>index.html</code> content as below.</p>
  
  <pre><code>&lt;script type='traceur-runtime.js'&gt;&lt;/script&gt;
  &lt;script src='app-build.js'&gt;&lt;/script&gt;
  </code></pre>
  
  <p>I have compiled the code using Traceur compiler, using <code>"Traceur --out newtraspiled.js oldmain.js"</code>. </p>
  
  <p>The, error is :</p>
  
  <blockquote>
    <p>"ReferenceError: System is not defined". </p>
  </blockquote>
  
  <p>Please help, if I need to add anything in System.js or runtime.js</p>
  
  <p>It has created the final js file like below.</p>
  
  <pre><code>System.registerModule("module1.js", [], function() {
  "use strict";
  </code></pre>
  
  <p>.
  .
  .</p>
  
  <pre><code>System.get("appl1.js" + '');
  </code></pre>
  
  <p>Thank you</p>