How do military components and systems handle electromagnetic pulse (EMP) weapons? I vaguely understand that the circuits are typically hardened, but not sure h

How do military components and systems handle electromagnetic pulse (EMP) weapons? I vaguely understand that the circuits are typically hardened, but not sure how robust this becomes from an overall systems perspective when most of your weapon, targeting or navigation systems become increasingly computerized. Seems that as more armed forces automate weaponized EMP research will correspondingly accelerate.