title: How to check whether it is a blob url using javascript
body: <p>I have a situation where I am converting blobURL to base64 dataURLs, but I want to do this only if url is a blobURL.</p>
  
  <p>So is there any way to check whether it is valid blob url?</p>
  
  <p>my blob url - <code>blob:http://192.168.0.136/85017e84-0f2d-4791-b563-240794abdcbf</code></p>