fnv1a_32 in JavaScript. see the history for a without-BigInt version

fnv1a32.js

const fnva = function(data){
    hval = BigInt(0x811c9dc5)
    for (var i = 0; i < data.length; i++){
        hval ^= BigInt(data[i])
        hval = (hval * BigInt(0x01000193)) % BigInt(2**32)
    }
    return hval.toString(16).slice(-8).toUpperCase()
}

const encoder = new TextEncoder()
console.log(fnva(encoder.encode(process.argv[2])))