You could set the header to overflow with ellipsis. Thank you for posting this! In the following CSS, we have three selectors targeting elements to set a color. The modern web is a flexible experience with so many screen sizes and devices to support. My attempt is not working. In the above example, even though the yellow selector has more components in total, only the value of the first column matters. Because the specificity weight comes from the matching selector with the greatest specificity weight. With the CSS box-sizing property, you have the ability to set how the size of elements in your code are calculated. Oh wow, Ive definitely required use case #2 on occasion, every time that situation has come up Ive completely ignored calc.. Anonymous 1,270 Points 0 Sign in to vote User2130758966 posted Forget about expressions they will only give you headaches and you are correct that they are non-standard. If the number in the ID columns of competing selectors is the same, then the next column, CLASS, is compared, as shown below. When conflicting declarations from the same origin and cascade layer with the !important flag are applied to the same element, the declaration with a greater specificity is applied. How would it help with the question? Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide, This isn't possible using pure CSS. If the logo has a left and right margin of 10 pixels I would need to subtract 120 pixels from 100%. Instead of using !important, consider using cascade layers and using low weight specificity throughout your CSS so that styles are easily overridden with slightly more specific rules. You are right, Luciano, it is not strictly necessary. Can you use CSS calc() function to make the height of an element match its width? There a way to use an element 's height property instead of width for calc ( ) element . Theoretically yes, as I understand it, provided the footers parent element is equal in height to the page, otherwise your formula would become convoluted. It is not possible as @YAMAN said but I have a trick to share with you just in case it works and help you. When used here (regularly) , what often is required is to add an additional CSS rule that merges the selector of the rule containing the attr() with the selector of a rule uniquely identifying each element in the page the effect is to be applied to. Well, it worked in Chrome too with the -webkit- prefix but broke in Safari so I had to take out all -webkit- prefixing, thereby unfortunately also disabling it in Chrome. Rationale for sending manned mission to another star? - You want the content to scroll, but you want just the content to scroll, not the entire module. Anybody know if there are any performance hits on using calc()? width + padding + border = rendered or displayed width of the element's box. It enables making CSS selectors very specific in what element is targeted without any increase to specificity. Heres a real world example. For example, if you want a full-page hero section to show before the rest of your content, making that part of your page 100vh high will push the rest of the content below the viewport, meaning that it will only appear once the document is scrolled. Understanding and effectively using specificity and the cascade can remove any need for the !important flag. You can apply this logic to. The viewport which is the visible area of your page in the browser you are using to view a site also has a size. same as firstSelector after its width has been calculated by browser. I want to use this feature more, but Im afraid of the performance cost Anyone have any numbers on this? It is something that has to happen at render time. The width and height properties include the content, padding, and border, but do not include the margin. I can understand
This size is determined by the image itself, not by any formatting we happen to apply. It should wrap if there is too much text for 1 line. yes, but these still depend on the fixed value set at the :root. The reason is simply that because each instance is likely to have a unique resulting value , each needs a unique slot in the CSS rules to hold the value as opposed to the often sought shared value of classes. Example: http://codepen.io/ggilmore/pen/d8fc7309e1fc387f8965e66674ac031c. Let's take a header where the logo is a known width, let's say 100 pixels. However, I have come to realize that the current state of the art for CSS does does give a
This is the best thing we could use it for! It specifies how to calculate the total width and height of that element. width: 28.5714%; label control might inherit from the width property of an
Going to test this now. Yea, thats what I meant. Is there a reason beyond protection from potential corruption to restrict a minister's ability to personally relieve and appoint civil servants? To see the example change when you change the viewport size you will need to load the example in a new browser window that you can resize (as the embedded