Now, as we have a file blob, we have two ways to download it. Blob goes firstĪs we already know what's a Blob, let's have a look at how to download any data just using JavaScript Blob API.Ĭonsider having a JSON format object which contains some application configurations: const configuration = įirstly we have to convert out configuration object into a Blob: const myBlobFile = new Blob( The Fileinterface is based on Blob, inheriting blob functionality and expanding it to support files on the user's system. Blobs can represent data that isn't necessarily in a JavaScript-native format.
MDN says: The Blob object represents a blob, which is a file-like object of immutable, raw data they can be read as text or binary data or converted into a ReadableStream so its methods can be used for processing the data.
However, the Blob API and the new File System Access API now allow us to easily and efficiently download any file using JavaScript with just a click of a button. In the past, if you needed to store data on your computer while working with JavaScript, you may have had to use server-side code or complex HTML.
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