title: Is there something of CANVAS shadow properties like the "spread" property of CSS box-shadow?
body: <p>For CSS box-shadow, the "spread" property is used to set the size of shadow. But the shadow API of CANVAS seems lack of the counterpart property.</p>
  
  <p>I know the answer is probably NO. </p>
  
  <p>But is there some way to achieve the shadow "spread" effect on CANVAS? </p>
  
  <p>If the answer is still NO, will it be "YES" in the next up-coming HTML standard?</p>