title: Number Format Using ExcelJS
body: <p>I am trying to apply number format using <strong>ExcelJS</strong> in Angular-6<br>
  For Example : +ive number should display same and -ive number should enclosed in small braces
  Here is my code for doing this </p>
  
  <pre><code>worksheet.getCell('F10').numFmt = '#,##0.00;(#,##0.00)';
  worksheet.getCell('F10').value = -28106.53;
  </code></pre>
  
  <p>Value is assigned to cell correctly but show hashes <code>#####</code> on protected mode like when I download the file from browser.<br>
  <em>After enabling edit:</em> On cell focus it display the value properly </p>