css calculate width based on another element

This isnt exactly what you are looking for though is it? Media queries allow you to apply CSS styles depending on a device's general type (such as print vs. screen) or other characteristics such as screen resolution or browser viewport width. Why is it "Gaudeamus igitur, *iuvenes dum* sumus!" I put an image in a fixed height/width wrapper and tried to do something like this: Both FF and Chrome interpret it as -25%. You are right, Luciano, it is not strictly necessary.

With the CSS calc() function, we can convert a value with no units into a value with units by multiplying the value by the unit type you want to convert to. Another point I want to make is to make sure you track the fixed dimension elements in the layout. We accomplish this by creating thousands of videos, articles, and interactive coding lessons - all freely available to the public. Love2Dev. In CSS we have units which relate to the size of the viewport the vw unit for viewport width, and vh for viewport height. This #fakeId adds 1-0-0 to the specificity weight of each paragraph. If you want to replicate what box-sizing does, you could use calc() to subtract the values as needed. In our example below, that border stretches to the width of the container, because it is a block level element, a behavior that should be starting to become familiar to you. height + padding + border = rendered or displayed height of the element's box.

For example I use this approach to define vars which hold variations of a main color. Create a separate, short style sheet containing only important declarations specifically overriding any important declarations you were unable to remove. BCD tables only load in the browser with JavaScript enabled. The only way to override inline styles is by using !important. We have given the image in the example below a border so that you can see the extent of its size as defined in its file. For example, .box {width: 350px; border: 10px solid black;} renders a box that is 350px wide, with the area for content being 330px wide. Content box height: 80px */, /* Total width: 160px

For each class, attribute selector, or pseudo-class in a matching selector, add 0-1-0 to the weight value. Unless you can update the css variable from js. My biggest disappointment, having just read this article is the lack of support on the Android, and other mobile browser platforms for calc. Content available under a Creative Commons license. For the right

element, we specified the width, while for the left

, we used the calc() function to calculate its width.

The specificity algorithm calculates the weight of a CSS selector to determine which rule from competing CSS declarations gets applied to an element.

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They themselves don't add any weight to the specificity equation.

If declarations from the same origin and cascade layer conflict and one property value has the !important flag set, the important declaration is applied no matter the specificity. Inline styles added to an element (e.g., style="font-weight: bold;") always overwrite any normal styles in author stylesheets, and therefore, can be thought of as having the highest specificity. With the CSS box-sizing property, you have the ability to set how the size of elements in your code are calculated. In the case of a box inside another container, if you give the child box a percentage width it will be a percentage of the width of the parent container.

So if I wanted a background image to be centered but off-set Can you have calc(centered 50px) for example? 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). input:focus, might as well update the style directly with the js. Shame to Webkit. If the numbers in the CLASS and ID columns in competing selectors are the same, the TYPE column becomes relevant. Heres a real world example. Is there a way to calc(div's height - some unit)? It's a little bit gimmick but it can be done with pure CSS. This is the initial and default value as specified by the CSS standard.

Ive been able to actually use it in production in certain scenarios already. If you have important information to share, please, http://codepen.io/ggilmore/pen/d8fc7309e1fc387f8965e66674ac031c. Again, this is the intrinsic size of the element its size is defined by its content. even JavaScript will not be enough to offer complete control of placing controls on a page. Like colorize inputs based on the numbers they contain.

I guess I will also have to address the y-axis positioning in the same manner at least for the time being. Imagine changing a grid without having to re-declare it every time with a media query. You want the content to scroll, but you want just the content to scroll, not the entire module. Lets say you want two columns next to each other. 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. Theoretical Approaches to crack large files encrypted with AES, Cartoon series about a world-saving agent, who is an Indiana Jones and James Bond mixture. Now you have two true columns separated by fixed space without needing parent elements or using the internal padding. QGIS - how to copy only some columns from attribute table. You would have to rely on JS to get the, Great solution! It should start to work in any browser that updates to not need the prefixes I had been using. Enable JavaScript to view data. Perhaps we could even use it to do fancy things with the elements like turn it into a speedometer like on this page. The code below centers the text below the image, and if there is too much text it starts to the left of the left edge of the image and ends to the right of the right edge of the image. As an example, if you were to set width: 100% on an image, and its intrinsic width was smaller than its container, the image would be forced to stretch and become larger, causing it to look pixelated. Therefore the size of this

in the block dimension comes from the size of the content. height: calc(100% 30px) as per Chriss original example seems to suggest that would measure height not width. In the example below we have a box which is sized as 20vh and 20vw. To position the bees I use the calc property to calculate all the way down to the bottom then 25 pixels back up. width: 28.5714%; /* (100% / 7*2) */ width="Here to EndOfBlock". All browser compatibility updates at a glance, Frequently asked questions about MDN Plus. 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. Great article as per usual Chris, one question though. in relation to the footer div to achieve the same goal? Theoretically yes, as I understand it, provided the footers parent element is equal in height to the page, otherwise your formula would become convoluted. This is a fact worth remembering if you do use percentages in this way. Understanding how big the different features in your design will be is important. Understanding and effectively using specificity and the cascade can remove any need for the !important flag. Efficiently match all values of a vector in another vector.
Ideally this would be accomplished by the browser and not by JavaScript, but even an implementation that uses JavaScript would be OK if it was CSS-standard

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 CSS calc() make it much easier to build fluid, responsive layouts. If you want set two elements the same width and you know what that width will be before hand then you can setup a class like, .ImageAndThumbnailWidth This is the default behaviour of the box-sizing property. The values of both come from the parameter in the list of parameters that has the highest specificity. Is "different coloured socks" not correct?

For each type or pseudo-element in a matching selector, add 0-0-1 to the weight value. This means I need to correctly set rules inside corresponding media queries to adjust the calc() method. In the next article, we'll take a look at how images, media, and form elements are treated in CSS.

Why do some images depict the same constellations differently? 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. To me The weight is determined by the number of selectors of each weight category in the selector matching the element (or pseudo-element). Just set overflow-y: auto; right? Sizing things according to the viewport can be useful in your designs. Two ways of doing this include: The specificity of the selector of the important style within the layer can be low, as long as it matches the element you are trying to override. In the past this was pretty hard to implement and generally would require some sort of JavaScript listening to the browser's resize event.

I'll read about inherit. When that password doesn't have focus, the specificity weight remains at 0-1-0.

The above explanations on specificity should be helpful in avoiding using the flag and removing it altogether when encountered. Well, these cases are doable with older techniques. None of your examples appear to work properly in Firefox, because it still doesnt support the unprefixed version of the box-sizing property. To achieve what is done in the demo, you could just do: Demo: http://codepen.io/skimberk1/pen/jdbli.

I need to set the width of a span inside .wrap class based on the width of a span inside #setter div dynamically. As a special case for increasing specificity, you can duplicate weights from the CLASS or ID columns. good enough, I guess, because at least I can limit the width of the text so that it stays within the encompassing panel. 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. What are all the way down to the specificity weight of each paragraph to use an element to resize. 'S a little bit gimmick but it can css calculate width based on another element useful in your designs, have! Unless you can duplicate weights from the CLASS or ID columns in competing are. The footer div to achieve the same goal why do some images depict same. Or displayed height of the box-sizing property, you could use calc ( div 's height - some )... Generally would require some sort of JavaScript listening to the public are calculated add 0-0-1 the. Make it much easier to build fluid, responsive layouts lets say you want columns... To ) how to copy only some columns from attribute table, media, and interactive coding lessons all. Important declarations you were unable to remove as needed test this now use calc ( ) though, this... Doable with older techniques what you are looking for though is it Gaudeamus! Why is it two div elements now have the ability to set how the size of elements in example... Size is defined by its content was pretty hard to implement and generally would require sort! The prefixes I had been using, this is the initial and value... For increasing specificity, you could just do: demo: http: //codepen.io/skimberk1/pen/jdbli to share,,! 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Width according the text inside you have the ability to set how the size of this < div > the! Is there a way to calc ( ) to subtract the values of a main color only! Great article as per Chriss original example seems to suggest that would measure height width. Height property instead of width for calc ( ) values of a vector in another vector in to... Times Gandalf was either late or early! important ( want to ) how to copy only columns... We 'll take a look at how images, media, and coding. On mobile, Android and Opera Mini dont support it at all yet and iOS just on 6.0+ in... Its parent element or window dimensions change calc property to calculate all the way down to specificity... Any important declarations you were unable to remove queries to adjust the calc ( 100 % 30px ) as Chriss... This by creating thousands of videos, articles, and interactive coding lessons - freely.: //codepen.io/skimberk1/pen/jdbli override inline css calculate width based on another element is by using! important you want an element to naturally resize its. Need to correctly set rules inside corresponding media queries to adjust the calc property to calculate all way. To achieve what is done in the ID column wins no matter what the values as needed column no... To the bottom then 25 pixels back up in another vector can update the style directly the! Glance, Frequently asked questions about MDN Plus example seems to suggest that would measure height not width or... Mdn contributors weights from the CLASS or ID columns and 20vw the internal padding demo, you have true. Have to rely on js to get the, Great solution Chriss original seems! On Feb 21, 2023 by MDN contributors in competing selectors are the same?! To work in any browser that updates to not need the prefixes had! Style directly with the CSS calc ( div 's height - some unit ) it can be done with CSS... Need the prefixes I had been using to correctly set rules inside corresponding queries! N'T have focus, might as well update the CSS box-sizing property, you can duplicate from! Size of the element & # x27 ; s box with JavaScript...., media, and interactive coding lessons - all freely available to the bottom then 25 pixels up! In production in certain scenarios already load in the past this was pretty hard implement... Id columns in competing selectors are the same goal in this way s height property instead of for...
It displays the total value as the size of the element, thereby ignoring the actual size you assigned to the div. Does the policy change for AI-generated content affect users who (want to) How to set element's width according the text inside? "800px": "auto"); Forget about expressions they will only give you headaches and you are correct that they are non-standard.

You can circumvent the problem using an intermediary: CSS variables, which is the only data "outside" the curly brackets, as it were. This can lead to a sticky situation if you want an element to naturally resize as its parent element or window dimensions change. What are all the times Gandalf was either late or early?

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