title: convert a week number and year to a date object in Javascript
body: <p>I am very new to web development and I am currently working on a dashboard my data comes from a MySql database. I would like to convert a week number and year to an actual date object in the frontend using javascript. This is my first try, which i stumbled while researching I believe that this function assumes the first day of the week of the current year is Monday(1):</p>
  <pre><code>function getDateOfWeek(w, y) {
     var d = 1 + (w - 1) * 7;
   
     return new Date(y, 0, d);
   }
  </code></pre>
  <p>But the idea that the first day of the week is always Monday is desirable what if otherwise? So upon more research, I modified the code to look like this:</p>
  <pre><code>let currentDate = new Date()
  let currentYear = currentDate.getFullYear()
  let firstOfJan = new Date(currentYear, 0, 1).getDay();
  
  function getDateOfWeek(w, y) {
     var d = firstOfJan + (w - firstOfJan) * 7;
   
     return new Date(y, 0, d);
   }
  </code></pre>
  <p>Please I am not sure if this solves the problem 100 percent. Is there a downside to the function above? or does it cover it? or I am missing something? Thank you for your time</p>