Is it possible to get the width of the window in em units using javascript?

Question

I\'m looking for a reliable way to get the width of the window in em units using javascript. I was surprised to see that jQuery will only return a result in pixel measurements.

Answer 1

Here's a solution that doesn't require jQuery, and doesn't require an explicit font-size declaration.

window.innerWidth / parseFloat(
  getComputedStyle(
    document.querySelector('body')
  )['font-size']
)