Class MessageBoxBeta

Example: demo.ts

import { MessageBox } from "@minecraft/server-ui";
import { CustomCommandStatus, Player, system } from "@minecraft/server";

// Run /test:messagebox in the chat to see the message box in action
system.beforeEvents.startup.subscribe((event) => {
   event.customCommandRegistry.registerCommand(
       {
           name: "test:messagebox",
           description: "Test the MessageBox API",
           permissionLevel: 0,
       },
       (origin) => {
           const player = origin.sourceEntity;
           if (!(player instanceof Player)) {
               return {
                   message: "This command can only be used by a player.",
                   status: CustomCommandStatus.Failure,
               };
           }
           MessageBox.create(player, "Delete Item")
               .body("Are you sure you want to delete this item? This action cannot be undone.")
               .button1("Delete")
               .button2("Cancel", "Keep the item and close this dialog")
               .show()
               .then((response) => {
                   if (response.selection === 0) {
                       console.log("Player chose to delete the item.");
                       // Here you would add the logic to delete the item from the player's inventory
                   }
               })
               .catch((e) => {
                   console.error(e);
               });
       }
   );
});
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