addCombos.js

// No error checking or anything! Use with caution!
function addCombos(list, combos=[], dict={}) {
    if (!list.length)
        return combos.concat(dict);
    
    let item = list[0];

    let possibilities = getPossibilities(item);
    possibilities.forEach(possibility => {
        let subDict = addKvp(dict, item, possibility);
        let subList = list.slice(1);
        combos = addCombos(subList, combos, subDict);
    });

    return combos;
}

function addKvp(dict, key, value) {
    return Object.assign({}, dict, { [key]: value });
}

function getPossibilities(item) {
    return [true, false];
}

console.log(addCombos(["Chat", "Appointment", "C2C"]));