All mods SE
In a Set
by Luis Martin
JavaScript
//url https://stackexchange.com/about/moderators
var totalMods = [];
var mods = document.querySelectorAll("div.mods-summary-list").forEach( row => row.innerText.split(",").map(el=>totalMods.push(el.trim())))
var set = new Set(totalMods);
console.log(set.size)