zero-width-hash.mjs

import { randomBytes, createHash } from 'node:crypto'

const ZERO_WIDTH_SPACE = '​'
const ZERO_WIDTH_JOINER = '‍'

const randomZeroWidthHash = () =>
    randomBytes(32)
        .reduce((a, b) => [...a, b.toString(2)], [])
        .reduce((a, c) => a + (+c ? ZERO_WIDTH_SPACE : ZERO_WIDTH_JOINER), '')
        .padEnd(256, ZERO_WIDTH_SPACE)

const createSha256Hash = (data) =>
    createHash('sha256')
        .update(data)
        .digest('hex')

function main() {
    const zwhash = randomZeroWidthHash()
    const test = `Hello ${zwhash}World!`

    console.log(createSha256Hash(zwhash))
    console.log(createSha256Hash(test.slice(6, 6 + zwhash.length)))
}

main()