title: How to convert strings to bigInt in JavaScript
body: <p>I need to convert a string to BigInt like <code>BigInteger</code> in Javascript</p>
  
  <p>Example</p>
  
  <pre><code>var reqId = "78099864177253771992779766288266836166272662";
  var result = parseInt(reqId);
  document.write(result);
  </code></pre>
  
  <p>Resultant value not matching since JavaScript only allows integers up to (2^53)-1.</p>
  
  <p>Is there any way to overcome this?</p>