title: stroke-dashoffset doesnt work for me
body: <p>While working with animating svg i discovered strange issue that stroke-dashoffset doesnt work for me. I want to make acheckmark to draw itself.</p>
  
  <p>I created a pen so you can watch it here:
  <a href="https://codepen.io/kalreg/pen/yorQaV" rel="nofollow noreferrer">https://codepen.io/kalreg/pen/yorQaV</a></p>
  
  <pre><code>&lt;svg&gt;
    &lt;path stroke="red" fill="none" stroke-width=10 stroke-dashoffset=6530  d="M5,50 L60,105 L150,5"&gt;&lt;/path&gt;
  &lt;/svg&gt;
  </code></pre>
  
  <p>Both changing css or attribute of path from negative, through 0 to positive values doesnt change appearance of checkmark</p>
  
  <p>I am not sure what am i doing wrong, so any advice would be more than appreciated.
  Thank you.</p>