How jQuery achieves intelligent floating location at the Page scrolling Layer

This effect can also be seen on a blog or Weibo, so the customer wants this effect. Next we will introduce the implementation process of floating positioning in detail, if you are interested, you can refer to the positioning problems that your brothers may encounter, especially on your blog or Weibo, as a result, product personnel will have the effect of others during planning, and we need to implement and implement it ..... No way. Who makes us a city attacker:

As shown in the following figure, when the scroll bar is pulled down, the Black Block TOP is 0, and the display is fixed:

The Code is as follows:

The Code is as follows:

JQuery achieves intelligent floating location at the Page scrolling Layer