Question

返回顶部JS代码网站里有 怎么不显示呢?

www 点 tt44 点 com 网站拉到下面有个 返回顶部 按钮 怎么不显示呢 哪位大哥帮我看看

Answer 1

你这个网站的common.js里的这段代码有问题。top变量值一直是0，导致置顶按钮一直隐藏。

改成var top=document.documentElement.scrollTop;就可以了

追问

下拉显示 回到顶部 按钮 点了不回顶部 大哥帮忙看看

追答

可以了啊

Answer 2

可能是代码有问题吧

Answer 3

1#baiduhaokan://home/index/?channel=recommend&vid=5662531199228490391&auto_play_index=0&tab=guide&tag=box_feedhktg&source=box_feedhktg-0-1021890u&ext_content=%7B%22BAIDUID%22%3A%226A548ED6BC4810F57E6BF2E00AA242D0%3AFG%3D1%22%2C%22vid%22%3Anull%2C%22cuid%22%3Anull%2C%22pd%22%3A%22box_feedhktg%22%2C%22rec_sid%22%3A%22gr_sid_1%22%2C%22is_show_banner%22%3Atrue%7D##baiduhaokan://home/index/?channel=recommend&vid=5662531199228490391&auto_play_index=0&tab=guide&tag=box_feedhktg&source=box_feedhktg-0-1021890u&ext_content=%7B%22BAIDUID%22%3A%226A548ED6BC4810F57E6BF2E00AA242D0%3AFG%3D1%22%2C%22vid%22%3Anull%2C%22cuid%22%3Anull%2C%22pd%22%3A%22box_feedhktg%22%2C%22rec_sid%22%3A%22gr_sid_1%22%2C%22is_show_banner%22%3Atrue%7D##baiduhaokan://home/index/?channel=recommend&vid=5662531199228490391&auto_play_index=0&tab=guide&tag=box_feedhktg&source=box_feedhktg-0-1021890u&ext_content=%7B%22BAIDUID%22%3A%226A548ED6BC4810F57E6BF2E00AA242D0%3AFG%3D1%22%2C%22vid%22%3Anull%2C%22cuid%22%3Anull%2C%22pd%22%3A%22box_fe

追问

你发的什么看不懂啊