floor12 / yii2-module-files

assets/yii2-floor12-files-block.js

function filesDownloadAll(title, event, yiiDownloadAllLink) {
    obj = $(event.target).parents('div.files-block');

The variable obj seems to be never declared. Assigning variables without defining them first makes them global. If this was intended, consider making it explicit like using window.obj.

    hashes = "";

The variable hashes seems to be never declared. Assigning variables without defining them first makes them global. If this was intended, consider making it explicit like using window.hashes.

    $.each(obj.find('.f12-file-object'), function (key, val) {
        hashes += "&hash[]=" + $(val).data('hash');

The variable hashes seems to be never declared. Assigning variables without defining them first makes them global. If this was intended, consider making it explicit like using window.hashes.

    });
    console.log(hashes);

console.log looks like debug code. Are you sure you do not want to remove it?

    window.open(yiiDownloadAllLink + "?title=" + title + hashes);

}