how to check if it is a blob objecyt code example
Example: how to find the data type in blob or not
var MyBlob = new Blob(['test text'], {type : 'text/plain'});
console.log(MyBlob instanceof Blob) // true
var MyBlob = new Blob(['test text'], {type : 'text/plain'});
console.log(MyBlob instanceof Blob) // true