Class ModalFormData

Example: effectGenerator.js

import { Player, world } from "@minecraft/server";
import { ModalFormData } from "@minecraft/server-ui";
let form = new ModalFormData();
let effectList = [
    { name: "Regeneration", id: "minecraft:regeneration" },
    { name: "Resistance", id: "minecraft:resistance" },
    { name: "Fire Resistance", id: "minecraft:fire_resistance" },
    { name: "Poison", id: "minecraft:poison" },
];
form.title("Effect Generator");
form.textField("Target", "Target of Effect");
form.dropdown(
    "Effect Type",
    effectList.map((effect) => effect.name)
);
form.slider("Effect Level", 0, 255, 1);
form.toggle("Hide Effect Particle", true);
for (const player of world.getAllPlayers()) {
    form.show(player).then((response) => {
        if (response.canceled) {
            player.sendMessage("Canceled due to " + response.cancelationReason);
        } else {
            const [targetName, dropdownValue, effectLevel, hideParticles] =
                response.formValues;
            if (
                typeof dropdownValue !== "string" ||
                typeof dropdownValue !== "number" ||
                typeof effectLevel !== "number" ||
                typeof hideParticles !== "boolean"
            )
                return player.sendMessage("Cannot process form result.");
            const target = world
                .getAllPlayers()
                .find((player) => player.name === targetName);
            if (!(target instanceof Player))
                return player.sendMessage("Target does not exist.");
            target.addEffect(effectList[dropdownValue].id, 50, {
                amplifier: effectLevel,
                showParticles: !hideParticles,
            });
        }
    });
}
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