title: how to copy font-family from a webpage
body: <p>Although having read some articles about font-family, I still don't have a deep understanding how it works. So I'm hoping this question may help me better understand how font-family works.</p>
  
  <p>I see some beautiful fonts on a website, the CSS of one of them  is <code>font-family:'Futura Today Bold',Arial,sans-serif</code>. I try to copy it to my website,  but it doesn't work. It seems the elements affected by this website are displaying default font. Here is a side question: how do I check what font an element is actually using? can I do it with javascript?</p>
  
  <p>And the main question is, how do I use this <code>'Futura Today Bold'</code> font on my website?</p>