In the CSS layout, the content overflows. Why does it not work even if the overflow attribute is set to the body? _html/css_WEB-ITnose

The green area above exceeds the page. Set overflow:scroll for the body;

The result is as follows. The scroll bar only appears in appearance, but cannot be scrolled. This is for What a horse?



Newbies looking for guidance~

Reply to discussion (solution)

You should set a fixed height for the body , otherwise if the content does not exceed the height of the visual area, it will naturally not scroll. You can change the size of the window to see the effect

You should set a fixed height for the body, otherwise if the content does not exceed the height of the visual area , naturally it will not scroll, you can change the size of the window to see the effect
Indeed, at the beginning, I set the HEIGHT of BODY to 100%, so it had no effect. Now it can slide if it exceeds 100%. But the height of each of my divs is set as a percentage. Why doesn't their height change after changing the height of the body?

I understand where I went wrong:
I initially used position: absolute for each div on the page to lay out, so setting height: 150% for the body has no impact on the height of the div. However, when laying out in this way, the left and top of each div must be set, and changing the div above will cause the data below to change accordingly. What's more troublesome is that when using percentages for left and top, as the browser zooms in and out, the position of the elements is very unstable.

Instead, use the method of floating some elements and adjusting margins for some elements. When the content exceeds the page, the page will automatically add scroll bars regardless of whether overflow is set or not. Why is this?

The body itself has a content-supported height. Since it exceeds the height of the visual area, scroll bars will naturally appear.

The body itself has a content-supported height. Since it exceeds the height, The higher the viewing area, the scroll bar will naturally appear.
Got it, thank you!