title: Javascript: Replace Comma with ### - only with in double quotes
body: <p>In the below string,</p>
  
  <pre><code>'This "is, "just, for", Test", ignore it. My name is "FirstName, LastName".'
  </code></pre>
  
  <p>I want to replace all Commas(,) only inside the double quotes("") with ###.</p>
  
  <p>For now I only found the matching pattern for (""), but need to build the regex to replace the commas. </p>
  
  <pre><code>/".*?"/g
  </code></pre>
  
  <p>Could you please help me? Thanks in advance ;) </p>
  
  <p>Expected o/p: This "is### "just### for"### Test", ignore it. My name is "FirstName### LastName".</p>
  
  <p>Note: This is not dupe of "<a href="https://stackoverflow.com/questions/6335264/find-comma-in-quotes-with-regex-and-replace-with-html-equiv">Find comma in quotes with regex and replace with HTML equiv</a>". Please see my expected o/p(Even I wanna replace the Comma in inner double quotes).</p>