How to check if a variable is a blob in JavaScript
As typeof returns "object"..
var MyBlob = new Blob(['test text'], {type : 'text/plain'});
console.log(typeof MyBlob) // "object"
is it too early to ask for a generic solution for checking whether or not a variable is a blob as it is not yet widely supported? Or how should I go about testing for blob type in browsers which already have it implemented?
Answer
You can test if it is an instanceof Blob like this:
var MyBlob = new Blob(['test text'], {type : 'text/plain'});
console.log(MyBlob instanceof Blob) // true
jsFiddle: http://jsfiddle.net/jfriend00/5xkgd/
This will work for things that inherit from Blob also.