title: css width: calc(100% -100px); alternative using jquery
body: <p>I'd like to use <code>width: calc(100% -100px);</code> which does the job perfectly for what I need it for, the only problem is its compatibility. At the moment it only works in the latest browsers and not at all in Safari. </p>
  
  <p>Could I make an alternative using jQuery? ie. get the 100% width of an object -100px and then dynamically set the result as the CSS width (so it would be responsive)</p>