🙂 Yes, of course, it is a little difficult to understand or use than other data types. It consists of an optional string type, blobParts, strings, as well as BufferSource. The Blob is a raw data: you can read it both as binary data or text. The Blob object visualizes a blob that is a file-like object of immutable. In other languages, buffers are proved very useful. The browser has additional high-level objects. It can be the binary data of an image for example.

Basically ArrayBuffer is used to keep binary data. Most APIs for working with blobs are asynchronous.īut synchronous versions of APIs are also available so that they can be used in WebWorkers.Ĭontent of a blob can be read as ArrayBuffer and therefore it makes blobs very handy to store binary data. A Blob can be used like a file wherever we use files. Blob data is stored in the memory or filesystem depending on the browser and blob size. They are the underlying data structure for File used in the FileReader API, for example.Ī Blob has its size and MIME type just like a file has.They can be saved to disk or read from a disk.They can be created from content from the network.Web Browsers implement a Blob object, which is responsible for holding data.

Blobs are a fundamental data type to understand.īlob means “Binary Large Object” and it’s an opaque representation of a chunk of bytes.

Javascript download blob