title: Javascript - hexadecimal string to decimal string
body: <p><strong>This question is more complicated than it first looks - although still conceptually fairly simple.</strong></p>
  
  <p>I am representing big numbers, which are outside of javascript's max range, as <em>strings</em> of hexadecimal digits (this is in accordance with the approach of node-mysql's <code>bigNumberStrings</code> option).</p>
  
  <p>I simply want to know how can I convert a <em>string</em> of hexadecimal digits into a <em>string</em> of decimal digits of the same numerical value? Obviously, there is a complexity in doing this arising from the fact that you cannot do maths with javascript with large numbers.</p>
  
  <p>I have done a significant amount of searching for a standard solution although I haven't found one yet.</p>