hex-binary-converter.js

function booleanArrayToHex(arr) {
    const binaryString = arr.map(it => it ? '1' : '0').join('');
    return parseInt(binaryString, 2).toString(16).toUpperCase();
}

function hexToBooleanArray(hex, arrayLength = 16){
    const binaryString = (parseInt(hex, 16).toString(2)).padStart(arrayLength, '0');
    return binaryString.split('').map(it => it === '1');
}

randomized-test.js

function randomTest() {
    const rndLength = Math.floor(Math.random() * 20) + 1;
    const testArr = [];
    for (let i = 0; i < rndLength; i++) {
        testArr.push((Math.floor(Math.random() * 20) + 1)%2 === 0);
    }

    console.log('test array', testArr);
    const hex = booleanArrayToHex(testArr);
    console.log('test hex', hex);
    const resultArr = hexToBooleanArray(hex, rndLength);
    console.log('test resul', resultArr);

    const same = testArr.reduce((acc, it, index) => {
        return (acc && resultArr[index] === it);

    }, true);

    console.log('is same', same);
}