`just-detect-adblock` is a lightweight JavaScript library that lets web developers programmatically check whether a visitor is using an ad‑blocking tool. It provides simple Promise‑based functions to detect common browser extensions, Brave shields, and Opera’s built‑in ad blocker, offering a minimal API compared to larger projects like BlockAdBlock or FuckAdBlock. The package is aimed at front‑end developers who need a straightforward way to react to ad‑block detection in their sites or apps.