Without this property, a string of text that is too long to fit within the line box would be unbreakable and cause overflow. The CSS overflow-wrap property specifies the circumstances when the browser breaks a line of text onto multiple lines. For example, if I defined the div containing the image with overflow: scroll then the image could be scrolled horizontally and vertically. If there is only one value, it applies to both the overflow-x and overflow-y properties. See the Pen css overflow: shorthand by HubSpot ( on CodePen. If two values are specified, the first represents the value of overflow-x and the second for overflow-y, shown below: You can also use the shorthand overflow property instead of defining both the overflow-x and overflow-y properties. See the Pen css overflow: overflow-y by HubSpot ( on CodePen. In this example, overflow-y is set to scroll and overflow-x is set to hidden this time. The overflow-y property controls vertical overflow, which is overflow from the top and bottom of an element’s box. See the Pen css overflow: overflow-x by HubSpot ( on CodePen. But overflow-y is set to hidden so you can't scroll up and down. In this example, overflow-x is set to scroll so you can scroll from left to right to view the image. The overflow-x property controls horizontal overflow – in other words, overflow from the left and right of an element’s box. Instead of using the overflow, you can use the overflow-x and overflow-y properties to control the overflow horizontally and vertically. See the Pen css overflow: auto by HubSpot ( on CodePen. In the example below, both divs are defined have an overflow value of auto, but only the second div has scrollable overflow and a scrollbar. The “auto” value is similar to scroll, but adds a scrollbar only if the box has overflow. See the Pen css overflow: scroll by HubSpot ( on CodePen. However, a scrollbar is be added so users can scroll to see the content that’s not currently visible. To hide overflow from rendering outside the element’s box while enabling users to view that content, set the overflow property to “scroll.” The overflow will still be clipped at the box’s padding edge. A user could use the mechanisms defined by the CSSOM View Module, for example, to see the hidden content. Note that this value still allows programmatic scrolling, which means the box is technically a scroll container. See the Pen css overflow: hidden by HubSpot ( on CodePen. Also, it will not allow the user to view the content beyond the padding edge by scrolling. This will clip the content at the box’s padding edge. To prevent overflow from rendering outside the element’s box, you can set the overflow property to hidden. See the Pen css overflow: visible by HubSpot ( on CodePen. This is the default value of the overflow property. Instead, it will render outside the element’s box and may overlap with other elements on the page. Visible means that the overflowing content will not be clipped. The CSS overflow property has several ways to control overflow. When the content of an HTML element extends beyond any of the box’s edges - whether that’s the content edge, padding edge, border edge, or margin edge - it is called overflow. This box comprises four layers: the content itself, the padding, the border, and the margin. You can use the CSS overflow property to control what happens to the overflow.īefore we look at the overflow property, let’s clarify what we meant by the “element box.” According to the CSS box model, a box is generated for HTML elements. This can happen when an element has a specified height that’s too small for the content it contains. In CSS, overflow occurs when an element’s content does not fit entirely inside the element box. Whether you’re using plain CSS or a framework like Bootstrap, here’s what you need to know. Then, we’ll explain how to control it with the following CSS properties: In this post, we’ll explain what overflow is in CSS. How come if I just set the bg color of the. Do I need to use overflow hidden? I would think that hidden would actually hide the unused background color, and B. My understanding of overflow is if there is content in the box, overflow controls where it goes if there's too much for the box size. However, when you use overflow hidden, the black background extends to the end of the page. If I don't use overflow at all, I end up with 5 left aligned nav box links, with a black background, and the remainder of div box to the right of the links is just the default background color (not black). I was copying some CSS from W3School and was confused at why you need to use 'overflow:hidden' here. I am pretty new to CSS so I am trying to figure this one out.
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