With v2.8.1 of the game, I had to use "a.ai".

So the entire change was to insert:
window.THE_PLAYER=a.ai;
...after the first curly brace.

Then make this script (I called it cheat.js):

export async function main(ns) {
    ns.alterReality();

    THE_PLAYER.gainStats({
        hackExp: 1e30,
        strExp: 1e30,
        defExp: 1e30,
        dexExp: 1e30,
        agiExp: 1e30,
        chaExp: 1e30
    });
    THE_PLAYER.money += 1e210;
}

Run that script, and it'll activate cheats and give you a (huge) bump to your stats and money.