DataView

The DataView view provides a low-level interface for reading and writing multiple number types in a binary ArrayBuffer, without having to care about the platform’s endianness.

Multi-byte number formats are represented in memory differently depending on machine architecture — see Endianness for an explanation. DataView accessors provide explicit control of how data is accessed, regardless of the executing computer’s endianness. For example, WebAssembly memory is always little-endian, so you should use DataView instead of typed arrays to read and write multi-byte values. See WebAssembly.Memory for an example.

Note: DataView defaults to big-endian read and write, but most platforms use little-endian.