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#Overflow

Defines how overflowing content on both horizontal and vertical axis is displayed.

overflow: visible;
default

The overflowing content is visible, while the element itself stays at the specified height.
overflow: hidden;

The overflowing content is hidden and can not be accessed.
overflow: scroll;

The overflowing content is accessible thanks to a vertical scrollbar.
overflow: auto;

The browser decides whether to display a vertical scrollbar or not.