Class EntityHealthComponent

Example: healthDisplay.js

import { system, world } from "@minecraft/server";

system.runInterval(() => {
   const players = world.getPlayers();
   for (const player of players) {
       const health = player.getComponent("health");
       player.onScreenDisplay.setActionBar(`Health: ${health.currentValue} / ${health.effectiveMax}`);
   }
});
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