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How to check if a variable is a blob in JavaScript

rated 0 times [ 122] [ 2] / answers: 1 / hits: 55582 / 11 Years ago, sun, december 22, 2013, 12:00:00

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?

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grayson

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answered 11 Years ago dontaemauricioc · Accepted Answer

You can test if it is an instanceof Blob like this:

var MyBlob = new Blob(['test text'], {type : 'text/plain'});

document.body.innerHTML = MyBlob instanceof Blob;

This will work for things that inherit from Blob also.