title: Why does Eclipse mark valid JavaScript with an error?
body: <p>The JavaScript:</p>
  
  <pre><code>[a,b] = [b,a];
  </code></pre>
  
  <p>The Eclipse error:</p>
  
  <blockquote>
    <p>The left-hand side of an assignment must be a variable</p>
  </blockquote>
  
  <p>Is there some plugin or something I need in order to get Eclipse to correctly inspect JavaScript? </p>