Overflow

The overflow property controls what happens to content that spills, or overflows, outside its box.

The most commonly used values are:

• hidden When set to this value, any content that overflows will be hidden from view.
• scroll: When set to this value, a scrollbar will be added to the element’s box so that the rest of the content can be viewed by scrolling.
• visible: When set to this value, the overflow content will be displayed outside of the containing element. Note, this is the default value.

p {
  overflow: scroll;
}

Here, if any of the paragraph content overflows (perhaps a user resizes their browser window), a scrollbar will appear so that users can view the rest of the content.