참고사이트 vanillajstoolkit.com/helpers/getsiblings/ getSiblings.js /*! * Get all siblings of an element * (c) 2018 Chris Ferdinandi, MIT License, https://gomakethings.com * @param {Node} elem The element * @return {Array} The siblings */ var getSiblings = function (elem) { return Array.prototype.filter.call(elem.parentNod vanillajstoolkit.com github.com/nefe/You-Dont-Need-jQuery/blob/master/README.k..