A file-like object of immutable, raw data. Blobs represent data that isn'tnecessarily in a JavaScript-native format. The File interface is based onBlob, inheriting blob functionality and expanding it to support files on theuser's system.

Provides information about files and allows JavaScript in a web page toaccess their content.

Lets web applications asynchronously read the contents of files (or raw databuffers) stored on the user's computer, using File or Blob objects to specifythe file or data to read.