怎么這里會(huì)報(bào)錯(cuò)啊??。?/h1>
$lastBox.offset().top ?為什么會(huì)報(bào)錯(cuò)Cannot read property 'top' of undefined
$lastBox.offset().top ?為什么會(huì)報(bào)錯(cuò)Cannot read property 'top' of undefined
2016-09-09
把$去掉
2016-08-16
看你獲取$lastBox哪里是不是寫錯(cuò)了