![]() ![]() IE displays a vertical scrollbar all the time whether it needs it or not. Here’s a simple start and here’s a StackOverflow thread with recommendations. If you absolutely need customized cross-browser scrollbars, you’ll need to handle it custom with JavaScript. It’s non-standard though and it’s unclear if the standards bodies are interested in standardizing it. WebKit/Blink browsers allow it and here’s some information about that. IE used to allow this in older versions of IE but it has since been discontinued. ![]() ![]() This is especially painful for layouts built on floated columns, and a single expanded column can push other columns down and cause some pretty seriously borked layouts. IE 6, 7 and 8 all screw up the default overflow visible and will expand a box horizontally to fit content (likely an image). There are lots of fun new bugs, including some very serious ones that hide entire web pages, with IE. Make sure to account for this substantial difference. I believe only IE actually gets this correct (it should be inside). Here they are: Scroll bars inside or outside of box?įirefox puts them outside, IE puts them inside. Like most things in CSS, there are plenty of cross-browser quirks with overflow. There is more detail about this and floats in general in the article All About Floats. This means that the element with overflow applied ( auto or hidden), will extend as large as it needs to encompass child elements inside that are floated (instead of collapsing), assuming that the height isn’t declared. Setting overflow doesn’t clear the float at the element, it self-clears. One more popular uses of setting overflow, strangely enough, is float clearing. AutoĪuto overflow is very similar to the scroll value, only it solves the problem of getting scrollbars when you don’t need them. Of note with this value is that you get BOTH horizontal and vertical scrollbars no matter what, even if the content requires only one or the other. Setting the overflow value of a box to scroll will hide the content from rendering outside the box, but will offer scrollbars to scroll the interior of the box to view the content. So for example a user has their default font size set larger than you would expect, you may be pushing text outside of a box and hiding it completely from their view. However, bear in mind that content that is hidden in this way is utterly inaccessible (short of viewing the source). This is particularly useful in use with dynamic content and the possibility of an overflow causing serious layout problems. This literally hides any content that extends beyond the box. The opposite of the default visible is hidden. Generally, you shouldn’t be setting static heights on boxes with web text in them anyway, so it shouldn’t come up. The important thing to remember here is that even though the content is visible outside of the box, that content does not affect the flow of the page. So in general, there is no reason to explicitly set this property to visible unless you are over-riding it from being set elsewhere. If you don’t set the overflow property at all, the default is visible. Let’s take a look at each and then discuss some common uses and quirks. There are also sister properties overflow-y and overflow-x, which enjoy less widespread adoption. There are four values for the overflow property: visible (default), hidden, scroll, and auto. But what happens when you do set a specific height or width on a box, and the content inside cannot fit? That is where the CSS overflow property comes in, allowing you to specify how you would like that handled. For example, if you don’t set the height of a box, the height of that box will grow as large as it needs to be to accommodate the content. By behavior, I mean how the box handles it when the content inside and around it changes. The sizing, positioning, and behavior of these boxes can all be controlled via CSS. You just nuked all styles of checkbox on WebKit, so yes you can't see whether they're checked or not (they still are, it just isn't visible to us sighted people without a screen reader).Every single element on a page is a rectangular box. ![]()
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