import { getUint2 } from 'nbit'; // get second 2bit value
let value = getUint2.call(dataView, 0.25);
getUint2 works just like getUint8. You still pass in how many bytes the value that you are looking for is offset. This leads us to passing in a byteOffset parameter that is a multiple of 0.25. For example, 7.25 bytes would refer to 58 bits offset (7.25 * 8 bits), which for a 2-bit array is 29 values offset.