magicweapon.js

const effect = {
    name: "Magic Weapon",
    modifier: {
        stat: "attack",
        value: 1,
        type: "item",
    },
    damageDice: {
        selector: "damage",
        diceNumber: 1,
    },
    iconPath: "systems/pf2e/icons/spells/magic-weapon.jpg",
};
(async () => {
    if (
        (actor.data.data.customModifiers[effect.modifier.stat] || []).some(
            (customModifier) => customModifier.name === effect.name
        )
    ) {
        if (token.data.effects.includes(effect.iconPath)) {
            await token.toggleEffect(effect.iconPath);
        }
        await actor.removeCustomModifier(effect.modifier.stat, effect.name);
        await actor.removeDamageDice(damageDice.selector, damageDice.name);
    } else {
        const itemID =
            actor.items
                .filter((item) => item.data.type === "action")
                .find((item) => item.data.name === effect.name)?._id ??
            actor.items.find((item) => item.data.name === effect.name)?._id;
        if (itemID) {
            game.pf2e.rollItemMacro(itemID);
        }
        if (!token.data.effects.includes(effect.iconPath)) {
            await token.toggleEffect(effect.iconPath);
        }
        await actor.addCustomModifier(
            effect.modifier.stat,
            effect.name,
            effect.modifier.value,
            effect.modifier.type
        );
        await actor.addDamageDice({ ...effect.damageDice, name: effect.name });
    }
})();