css calculate width based on another element

The matches-any pseudo-class :is(), the relational pseudo-class :has(), and the negation pseudo-class :not() are not considered as pseudo-classes in the specificity weight calculation. is 100% of the immediate parent, not the window. One CSS selector haswidth: Rationale for sending manned mission to another star? Content available under a Creative Commons license. I want to achieve this with pure css, is that possible? How to set width of tag in angular? Local vars will only work logically within the same selector, but global vars are the same throughout all your CSS. How to Calculate the Width of an Element with the CSS calc() Function, How to Make a Div Fill the Remaining Width. If both selectors match the same , the color will be blue. 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. Here you can see the CSS width property is set using the calc method. For example, if you were to set --hex-parent-height dynamically and something goes wrong and the var is left unset, you may insert a default value to minimize the damages, like so: var(--hex-parent-height, 10px). Oh wow, Ive definitely required use case #2 on occasion, every time that situation has come up Ive completely ignored calc.. Youll have to make the call there. That is, if you set an element's width to 200 pixels, that 200 pixels will include any border or padding you add, and the content box will shrink to absorb that extra width. How to say They came, they saw, they conquered in Latin? However, this is not the case! Rationale for sending manned mission to another star? Great article as per usual Chris, one question though. QGIS - how to copy only some columns from attribute table. Dynamically changing the width an element in Angular. The values of both come from the parameter in the list of parameters that has the highest specificity. calculate CSS values based on the values of other properties and the ability to add or subtract within the value. This can be useful with CSS variables, as in the example below: .class { --fav-num: 3; width: calc(var(--fav-num) * 1px); // 3px } Ive got a one-page site I put together for a local honey stand and I kind of use it to experiment with newer CSS features: The main content DIV uses CSS3 multiple backgrounds (honeycomb pattern, grass [at the bottom], and bees [also at bottom]). It has four simple math operators: add (+), subtract (-), multiply (*), and divide (/). On mobile, Android and Opera Mini dont support it at all yet and iOS just on 6.0+. Otherwise the outline slides into nearby elements, unless you specify a margin. selector. The columns themselves bump right into each other and the columns are made by internal padding inside those columns. For example, if your theme includes the following CSS: Then the developer implementing the widget can easily override the link color using only type selectors. This page was last modified on Mar 15, 2023 by MDN contributors. Theoretically yes, as I understand it, provided the footers parent element is equal in height to the page, otherwise your formula would become convoluted. Lets say you want two columns next to each other. In this snippet, you can find some examples, where we calculate the width of an element with the CSS calc() function. How To Make Horizontal Lines In Html And CSS - Cool Ways You Can Style The HR Element, HTML And CSS Space To Create Layouts To Increase User Engagement Using line-height, Whitespace And Margin , 5 Ways To CSS Background Gradients Can Create Stripes (Examples) - Including How To Make A Barbershop Pole Effect. Get started with $200 in free credit! So I set What Im really looking forward to is using calc() with CSS variable. Math expressions involving percentages for widths and heights on table columns, table column groups, table rows, table row groups, and table cells in both auto and fixed layout tables may be treated as if auto had been specified. We can, of course, give elements in our design a specific size. The box-sizing property is specified as a single keyword chosen from the list of values below. Can I get help on an issue where unexpected/illegible characters render in Safari on some HTML pages? width + padding + border = rendered or displayed width of the element's box. width: calc(100% / 7*2); Visit Mozilla Corporations not-for-profit parent, the Mozilla Foundation.Portions of this content are 19982023 by individual mozilla.org contributors. Because why would anyone assign the same width and height to two div elements unless they ideally wanted those elements to be the same? And if it was, some people turn JavaScript off for their browsers for security reasons. 80%). I don't think there is a way to reference property value of specific element that is not a parent element. The height and width properties may have the following values:. Is there a legal reason that organizations often refuse to comment on an issue citing "ongoing litigation"? This means I need to correctly set rules inside corresponding media queries to adjust the calc() method. You place some sort of mathematical equation in the function and the browser will automatically calculate an updated property value as the screen size changes. By clicking Post Your Answer, you agree to our terms of service and acknowledge that you have read and understand our privacy policy and code of conduct. Install Love2Dev for quick, easy access from your homescreen or start menu. I think using the calc will actually not give you the axact size of pages you need cos it will be too large. This is a fact worth remembering if you do use percentages in this way. Love2Dev. Asking for help, clarification, or responding to other answers. A few things to remember about specificity: This page was last modified on May 17, 2023 by MDN contributors. If the logo has a left and right margin of 10 pixels I would need to subtract 120 pixels from 100%. When a size is given to an element (the content of which then needs to fit into that size) we refer to it as an extrinsic size. The specificity algorithm is basically a three-column value of three categories or weights - ID, CLASS, and TYPE - corresponding to the three types of selectors. Its like javascript function,mathematics calculation. Angularjs adjust width based on parent element width, Set Width of HTML element at runtime in AngularJS, how to assign a width to span dynamically, Calculate width of element - Angular Directive, angularjs ng-style with calculations of width in html tag. Find centralized, trusted content and collaborate around the technologies you use most. This means fluid, responsive designs are a requirement. 576), AI/ML Tool examples part 3 - Title-Drafting Assistant, We are graduating the updated button styling for vote arrows. I wanted to use this for vertical centering. This page was last modified on May 12, 2023 by MDN contributors. Would it be possible to build a powerless holographic projector? I think it will be interesting when we can use the attr() function in places other than the content property. A percentage doesnt work very well because that will vary as the amount of content varies and because of other factors, and a solid pixel count wouldnt work either for the same reasons. same as firstSelector after its width has been calculated by browser. If the element has any border or padding, this is then added to the width and height to arrive at the size of the box that's rendered on the screen. If you're unable to remove !important flags from an authors style sheet, the only solution to overriding the important styles is by using !important. good enough, I guess, because at least I can limit the width of the text so that it stays within the encompassing panel. You might expect for example the percentage top and bottom margins to be a percentage of the element's height, and the percentage left and right margins to be a percentage of the element's width. The CLASS column is the count of class names, attribute selectors, and pseudo-classes in the selector. Speaking of columns, sometimes division math gets messy. Depending on how you add it, you can add some, a lot, or no specificity, as shown below: No matter the order, the heading will be green because that rule is the most specific. The negation pseudo-class, :not(), itself has no weight. Content box width: 160px The height of the image is set (height="90%"), but the width (width="auto")is determined by the browser. I want to use this feature more, but Im afraid of the performance cost Anyone have any numbers on this? How can I set the height of an element to the computed height of another one? As seen in the code snippet above, the size of this div element has automatically increased to 256px even when it was originally set to 200px. Is there a faster algorithm for max(ctz(x), ctz(y))? A block level child element with height: 100% will be as tall as its block level parent element. To position the bees I use the calc property to calculate all the way down to the bottom then 25 pixels back up. There is content to the logo's right, the site menu or some sort of title or tag line text. Get started, freeCodeCamp is a donor-supported tax-exempt 501(c)(3) charity organization (United States Federal Tax Identification Number: 82-0779546). Find centralized, trusted content and collaborate around the technologies you use most. ), but I've changed my mind - using JS to set a CSS variable allows us to do all of the "other" calculations in CSS, thus simplifying the rest of the layout/animation. Were sorry. How to Calculate the Width of an Element with the CSS calc () Function The usage of the CSS calc () function In this snippet, you can find some examples, where we calculate the width of an element with the CSS calc () function. Styles for a directly targeted element will always take precedence over inherited styles, regardless of the specificity of the inherited rule. My secret hope was to use CSS to have total control over the placement of text and images, with the ability to line up the text with the edges of the image. Only declare important rules within the layer. Is their a way to make the three pages equal. Defines the width as a percentage of the containing block's width. To remove the perceived need for !important, you can do one of the following: All these methods are covered in preceding sections. The box-sizing property can be used to adjust this behavior: content-box gives you the default CSS box-sizing behavior. Codepen: http://codepen.io/jacek213/pen/pbPkmQ. If you have important information to share, please, http://codepen.io/ggilmore/pen/d8fc7309e1fc387f8965e66674ac031c. Includes type selectors, such as p, h1, and td, and pseudo-elements like ::before, ::placeholder, and all other selectors with double-colon notation. But definitely, don't use !important when writing plugins or frameworks that other developers will need to incorporate without being able to control. Might be cool someday if calc() could subtract measured sizes of elements, but thats not possible yet. The specificity-adjustment pseudo-class :where() always has its specificity replaced with zero, 0-0-0. As to the attr() value and wide use beyond the content property , one is liable to in those cases run into the peculiarities of instance. We use cookies to give you the best experience possible. If you place an image on a page and do not change its height or width, either by using attributes on the tag or else by CSS, it will be displayed using that intrinsic size. At least thats what I recall at this particular moment , so dont take it as the gospel, but rather just something one might want to consider as a possibility. width: 28.5714%; /* (100% / 7*2) */ What's the purpose of a convex saw blade? and worked on all of the browsers. It can be nice to make a colored module as tall as the parent element in some cases. The width and height properties include the content, but does not include the padding, border, or margin. On another note the animation Ive applied only works in Firefox. All Rights Reserved. If using selector duplication, always comment your CSS. In the example below, we have used the same image three times. The selector with the greater value in the ID column wins no matter what the values are in the other columns. I'll read about inherit. At the beginning of your stylesheet declarations, create a named cascade layer, like so: Each time you need to override an important declaration, declare it within the named layer. The second image has max-width: 100% set on it and therefore does not stretch to fill the container. Although, is it defined width or defined relative dimension (i.e. Let's merge both code snippets and see exactly how the box will look with content-box and border-box. Unless you can update the css variable from js. Is there a way to calc(div's height - some unit)? The border now contains that text because the height of the element is defined by the content. The first column is the value of the ID component, which is the number of IDs in each selector. The box contains a letter A, which has been given a font-size of 10vh. On the other hand, when you're using position: relative or position: absolute, using box-sizing: content-box allows the positioning values to be relative to the content, and independent of changes to border and padding sizes. The selector weight categories are listed here in the order of decreasing specificity: Includes only ID selectors, such as #example. BCD tables only load in the browser with JavaScript enabled. Progressive Web Apps From Beginner to Expert $12.99. Where did you find the documentation for it? When you move onto CSS Layout, sizing will become very important in mastering the different layout methods, so it is worth understanding the concepts here before moving on. You can also include the id or any part of a selector as a parameter in the :where() specificity-adjustment pseudo class if you need to make a selector more specific but don't want to add any specificity at all. Defines the width as a percentage of the containing block's width. If my memory serves , 100% in calc() seems to reflect the width of the last position:relative parent. How do you ensure you are not wasting available space with that right-side content? Generally, you want to keep specificity down to a minimum, but if you need to increase an element's specificity for a particular reason, these three pseudo-classes can help. My biggest disappointment, having just read this article is the lack of support on the Android, and other mobile browser platforms for calc. I plan to explore it soon, but I suspect that The specificity weight comes from the matching selector. If the password input type with required is nested in an element with id="myApp" set, the specificity weight will be 1-2-1, based on one ID, two pseudo-classes, and one element type, whether or not it has focus. Therefore the size of this