Construct-JS – A library for creating byte level data structures

If the argument provided is an array, then the size of the field is bytes, with each value corresponding to an 8-bit interpretation of that value. If the argument provided is an array, then the size of the field is bytes, with each value corresponding to an 8-bit interpretation of that value. If the argument provided is an array, then the size of the field is bytes, with each value corresponding to an 16-bit interpretation of that value.

Source: github.com