shim.js

const flatten = arr => {
    while (arr.find(el => Array.isArray(el))) arr = Array.prototype.concat(...arr)
    return arr
}

const _gtSetMessage = message => FF.ns.battle.BattleViewController.getInstance().showMessage({ message: message })

const logit = () => {
    FF.env.isDevelop = function() { return true; }
        // FF.logger.debug = function() { try { alert(JSON.stringify(arguments)) } catch (e) {} }
        // alert(
        //     JSON.stringify(
        //         FF.ns.battle.BattleInfo.getInstance().getDropItemList()
        //     )
        // )

    _gtSetMessage(JSON.stringify(
        flatten(
            FF.ns.battle.BattleInfo.getInstance()._battleInitData.battle.rounds.map(round => round.enemy.map(enemy => enemy.children.map(child => child.dropItemList)))
        )
    ))
}

var _gtInterval = setInterval(() => {
    try {
        logit();
        // clearTimeout(_gtInterval);
    } catch (e) {

    }
}, 3000);