These APIs are used to read file locally, handling images etc. Some of the specifications are as listed below:
1. File: Provides read-only information about the file like name, filesize, mimetype etc.
2. FileList: Represents an array of individually selected files from the local system
3. Blob: Represents the raw binary data and allows access to range of bytes within the data which can be used for slicing file
4. FileReader: Provides methods to read data from file or Blob