Add a button for all websites which can back to the top and go to the bottom,and there is a sliding effecct.
< Feedback on a button which can back to the top and go to the bottom
图片失效了,但其实只需要找张图片,把图片地址替换掉就行
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图片失效了,但其实只需要找张图片,把图片地址替换掉就行