Examples of using jQuery animation effects animate and scrollTop together_jquery

CSS property values ​​change gradually, allowing you to create animated effects.
Only numeric values ​​can be animated (e.g. "margin:30px").
String values ​​cannot be animated (such as "background-color:red").

The above code indicates that the scroll bar jumps to the 0 position, and the page movement speed is 800.
Practical example combining scrollTop:

means clicking on the relevant ID to move to the specified position:
The click ID is shang element, return to the top;
Click the element with ID comt, return to the position with ID comments;
Click the element with ID xia, return to the bottom;