title: How to recalculate all formulas in excel file through Javascript?
body: <p>I am trying to create a web app to open excel file on web page and I am using 'xlsx' module for this purpose.</p>
  <p>The problem is when I modify any content through 'xlsx' module. Sheet formulas do not refresh.</p>
  <p>For Instance, A1 = 2 ,  B1 = 2 ,C1 = sum(A1:B1) = 4. Now if I edit A1 to 3, C3 does not change to 5.</p>
  <p>This is Object format before saving:</p>
  <pre><code>{
  A1: {t: 'n', v: 3, w: '3'},
  B1: {t: 'n', v: 2, w: '2'},
  C1: {t: 'n', v: 4, f: 'sum(A1:B1)' ,w: 4}
  }
  </code></pre>
  <p>A short Note: This is just a small sample code. In real project its almost impossible to manually calculate all formulas at saving stage.</p>
  <p>And, If I had to bring 5 at C3 then I need to open that file in excel and again change A1 or B1. Is there any way to refresh all formula cells in 'xlsx'. So all formulas gets recalculated.</p>