Basically, doing this with CSS in a browser compatible way is not trivial (but trivial with tables) so find yourself an appropriate pre-packaged solution. How to navigate URL in an iframe with JavaScript ? There is this propety of CSS called box-sizing. I was also using, Tables in css layouts aren't recommended for modern sites. This means that flex items will expand to cover the length of the container's cross axis, which would be the height in this case. Awesome post, John. (Basically Dog-people). You should then be able to give the child top and bottom values (top: 0; bottom: 0;) making it stretch out the entire height of the parent. On a smaller screen you would probably want to keep the height auto as the col1, col2 and col3 are stacked on one another. This will make the content of the container stop resizing it. If it's 100% height the answer is slightly different. How to create a moving div using JavaScript ? Therefore, no additional elements like margin, padding or border, even though the two latter are seemingly the inner parts of the element, will be calculated. Demo: How to Get Centered Content Using Twitter Bootstrap, How to Change the Checkbox Size Using Css, What's the Valid Way to Include an Image With No Src, ≪!--[If !Ie]≫ Is Not Working as Expected in This Case, Show Loading Screen When Navigating Between Routes in Angular 2, I Need an Unordered List Without Any Bullets, Css Grid Layout Not Working in Ie11 Even With Prefixes, Render a String in HTML and Preserve Spaces and Linebreaks. This is the best answer. Em is a unit derived from parents font size. Thanks for the reminder. Your email address will be kept private. Ok guys finally I founded ! You can put display: flex to div#main, align-self: stretch to div#navigation. How to set the security algorithm of key in HTML5 ? The problem this creates with a parent HTML element that only contains floated children elements is the resulting height is no longer auto, but instead renders as height: 0. How to specify that an option-group should be disabled in HTML5 ? I get the impression you are teaching yourself and that is wicked awesome! Yes, Ive been using Flexbox for, gosh, probably the last three years. Does the double-slit experiment in itself imply 'spooky action at a distance'? .parent { background: red; padding: 10px; display:flex; } .other-child { width: 100px; background: yellow; height: 150px; padding: .5rem; } .child { width: 100px; background: blue; } You could do something like the equal height column trick. Is quantile regression a maximum likelihood method? . acknowledge that you have read and understood our, Data Structure & Algorithm Classes (Live), Data Structure & Algorithm-Self Paced(C++/JAVA), Android App Development with Kotlin(Live), Full Stack Development with React & Node JS(Live), GATE CS Original Papers and Official Keys, ISRO CS Original Papers and Official Keys, ISRO CS Syllabus for Scientist/Engineer Exam, Display div element on hovering over tag using CSS, How to overlay one div over another div using CSS. This is pretty self explanatory, but let me clarify: these units are like percentage in relation to viewport. How to apply style to parent if it has child with CSS? If you haven't given explicit height, you could try this is using. The forum CSS is closed to new topics and replies. 20122023 Lockedown SEO. Question said 'without specifying parent's height?'. EDIT: I'm doing this completely in my head, but you would probably also need to set the navigation div's left margin to a negative value or set it's absolute left to 0 to shove it back to the far left. In the parent container, we also have another
with a class wrap, for which we use the relative value of the position property. They are all added on top of elements dimension. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. For an explanation on why not to use height:100%, check this article; To understand why, you need to understand how browsers interpret I have a fairly simple problem. Usually it's equal height. Usually it's equal height. How to stretch and scale background image using CSS? If I put a min-height on my container, I'm not explicitly specifying its height - so my element should get an auto height. Sometimes you dont have to specify the dimensions, you just need to make sure that elements fit with each other. We only set div#div1 to have a text color of red, yet the CSS rule was applied to its two child divelements: div#div1Child and div#div2Child.The two child div elements had no CSS ruleset of color: red set on them.. What happened? For a modern approach, see: https://stackoverflow.com/a/23300532/1155721. When you specify a percentage for max-height on a child, it is a percentage of the parent's actual height, not the parent's max-height, oddly enough. How to set flexbox having unequal width of elements using CSS ? In case someone is struggling to work with square divs that are also flex containers in Firefox or Edge, just remember to set the :before element to display: table. Another easy solution is to use the CSS3 calc functional unit, as Alvaro points out in his answer, but it requires the height of the first child to be a known value: It is pretty widely supported, with the only notable exceptions being Thanks for contributing an answer to Stack Overflow! The flex-grow property makes the child element grow to fit whatever the height of its . Visit magdazelezik.com, I highly recommend this (small) bible by CSS Tricks. One solution to your problem could be absolute positioning. In the example below, we set the position of the parent
to static, which means that elements are placed according to the documents normal flow. What does a search warrant actually look like? Then set the childs position to absolute. This usually causes some troubled with fluid layout. You would probably need to do something like: and set the content div to have a left margin of whatever the width of the navigation pane is. What is the use of # symbol in link URL ? a function of how wide the browser window is opened. So, if your element is inside another element that has a height of 100px, and you set the child element's height to 100%. This also works in IE7, with scrollbars added. Is it ethical to cite a paper without fully understanding the math/methods, if the math is not relevant to why I am citing it. Also, the answer varies on whether you want 100% height or equal height. How to Skew Text on Hover using HTML and CSS? If set relatively, elements height will be relative to the height of the parent if set. Making a child
element wider than the parent
can be done with some CSS properties. There are different ways to solve the problem.I recommend one of these two ways: However, you can also solve them using these ways: The parent needs display: flex and flex-direction: column to lay out its children in a column. or padding-bottom: 100%; it's not precise but it works well for some situations. I am guessing it is about Dmitry's code. I will be re-writing my code from scratch taking into account those guidelines. Thank you for clearing up that mess. HTML/CSS aligning images using `

` and `float`, Make a div fill the height of the remaining screen space. I recommend one of these two ways: CSS Flexbox . Also flex-items don't care about floats. elements don't have heights set. Because span1 is set to height: 100% and the flex container has no defined height, this element computes to height: auto (the height of the content). This seemingly pointless code is to define to the browser what 100% means. NOTE: This answer is applicable to legacy browsers without support for the Flexbox standard. How to create horizontal scrollable sections using CSS ? I had to dig into the W3C standard to find out: The position and size of an element's box(es) are sometimes calculated relative to a certain rectangle, called the containing block of the element. Launching the CI/CD and R Collectives and community editing features for Wrapper Does not appear fully to the footer, Equalize the height of left and right div, prevent right div from going below left div, Make a div fill the height of the remaining screen space, How to make a div 100% height of the browser window. How to Make body height to 100% of the Browser Height ? acknowledge that you have read and understood our, Data Structure & Algorithm Classes (Live), Data Structure & Algorithm-Self Paced(C++/JAVA), Full Stack Development with React & Node JS(Live), GATE CS Original Papers and Official Keys, ISRO CS Original Papers and Official Keys, ISRO CS Syllabus for Scientist/Engineer Exam, Difference between semantic and non-semantic elements. John Locke is a SEO consultant from Sacramento, CA. Method 2: We can make the display attribute of the child container to table-row and display attribute of parent container to table, that will take all the height available from the parent div element. 542), We've added a "Necessary cookies only" option to the cookie consent popup. Not the answer you're looking for? These days, I usually use display: flex; justify-content: space-between; to create a parent element that contains all elements and creates equal height. For this to successfully work, your child elements must not be position:absolute as you have for #contentMain and #contentSidebar, instead make these floats (float:left and float:right) and after the #contentSidebar div closes, add a

to clear floats, allowing the parent to wrap around them perfectly. Now let's put into this div an h2 element with font-size: 1.2em. I want height to be 100% of the viewport. You can also set dynamic width and height on child elements. Put your backs into it lads! You also have the option to opt-out of these cookies. \m/. It has width of 404px, because I made window very small, it has height of 18px because font-size is 16px plus line-height, and then it has three values set: margin, padding and border. Have you looked into flex? Connect and share knowledge within a single location that is structured and easy to search. Retracting Acceptance Offer to Graduate School, How do I apply a consistent wave pattern along a spiral curve in Geo-Nodes. When your element is nested inside another element, the browser will use the parent element's height to calculate a value for 100%. What worked for me was adding Lets now assume I would like to set my width to 50% and have two divs alongside each other (using float for example). To learn more, see our tips on writing great answers. How to expand floated child div's height to its parent's height in CSS ? height), and this element is not absolutely positioned, the value How to specify the media type of the script in HTML5 ? And, for your information, it is not pseudo-code, it is code in the Less language, a way of defining CSS in a procedural way. I find that setting the two columns to display: table-cell; instead of float: left; works well. How can I expand floated child div's height to parent's height? Make a div fill the height of the remaining screen space, How to make a div 100% height of the browser window. In our example, we have a parent element with two floated child elements. Even in bare eye they are no close to being 50% wide. Thanks Mark Chouinard for catching the typo in the headline of the fourth code sample. How to set the number of rows a table cell should span in HTML ? Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide, It works! For instance, the body has font-size set to 16px, so that if we set font-size: 2em for div element, it will have font-size set to 32px. Thus, this remark belongs to a comment below his answer! How to stretch div to fit the container ? height : will only work, if you have all parent nodes with specified percent height with a fixed height in pixels, ems, etc. Answer: Set the 100% height for parents too And we all know that the default value of the height property is auto , so if we also set the height of and elements to 100%, the resulting height of the container div becomes equal the 100% height of the browser window. Was the OP talking about the whole page? How to create Perspective Text using HTML & CSS ? Many web designers and front end developers have been stumped by this dilemma before. The way it reads now, it looks like it's just about being 100% the height of the parent element, which probably isn't the page or the viewport. It may not be the most, This is exactly what I was doing, wanted to add an answer. If you dislike it , display : flex; instead of display:table; can be used too , but this is still much too young in CSS to be solid IE8-10 will not understand it at all. How to create a multiline input control text area in HTML5 ? Just gave him (right: 0) because i had (float: right) on child. How to align flexbox columns left and right using CSS ? The display:block is the default display value for the div, but I like to make it explicit. However it is still a working solution. Thanks for contributing an answer to Stack Overflow! Not the answer you're looking for? How to specify which form element a label is bound to ? How to make a HTML link that forces refresh ? If we don't specify the position of the parent element, the child <div> will be positioned relative to the page. Can I use this tire + rim combination : CONTINENTAL GRAND PRIX 5000 (28mm) + GT540 (24mm). This will make child as long as the parent is. Take a look at the snippets below, and how they get . The problem this creates with a parent HTML element that only contains floated children elements is the resulting height is no longer auto, but instead renders as height: 0. Thanks for stopping by to say hi! Rem is easier, it is a unit derived from root (html) and only the root. Does With(NoLock) help with query performance? I'll assume (b)if that is so, I don't think you will be able to do it given your current page structure (at least, not with pure CSS and no scripting). By clicking Accept, you consent to the use of ALL the cookies. Didn't knew one could define both top and bottom and it would work this way. It is mandatory to procure user consent prior to running these cookies on your website. There are two methods to stretch the div to fit the container using CSS that are discussed below: Method 1: First method is to simply assign 100% width and 100% height to the child div so that it will take all available space of the parent div. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. You are, in effect, asking the browser parent { height. As far as I know, position: absolute removes the element from the normal flow, so any height that would be added to the parent element would be ignored. How to add Google map inside html page without using API key ? Both cells will grow to fit the content. One solution to your problem could be absolute positioning. Wow it solves a lot of problems. A child div inside a container can be made to take the complete width and height of the parent div. +1 because it specifically addresses the OP's question. A-143, 9th Floor, Sovereign Corporate Tower, We use cookies to ensure you have the best browsing experience on our website. The math is 16 * 2 * 1.2 = 38.4. With element being a block, come some properties you are sure aware of: Here we have our element. A percentage height on the root element is relative What are examples of software that may be seriously affected by a time jump? But once you get a rough sketch going, abstract out to CSS and have some fun. To get the body container to take up the remaining space in blue, we use flexbox. Unless a child is position: absolute or a float, the parent will encompass the child and therefore the child will be 100% of its parents height. As @Adam Garner noted, align-items: stretch; is not needed. How to set div width to fit content using CSS ? eg. The following code give an ability of setting minimum height to the scroll div and also make it having 100% height of its parent by just using flex. So perhaps you are missing something. We want .wrapper to span the entire viewport, so we set width: 100vw and height: 100vh. But height is calculated differently. states bootstrap but you do not need bootstrap to use this. Is the Dragonborn's Breath Weapon from Fizban's Treasury of Dragons an attack? When you have a parent div with only floated child elements inside, how do you give the parent element the height of the floated child elements? #innerPageWrapper also does act visually as a semi-transparent border in the layout. You should add some prefixes, http://css-tricks.com/using-flexbox/. I tend to use Method#2 where possible, although I think Method#4 would be the most robust for browser support (and semantics). Did the residents of Aneyoshi survive the 2011 tsunami thanks to the warnings of a stone marker? The following is the CSS: The table has some content that sets its height. This was the same answer I provided to this Question. Two element alongside each other with margins (lighter orange), border and padding! Brilliant! The bug doesn't show when the inner element has absolute positioning. However after a media query breakpoint you would like cols to appear next to each other with an equal height for all columns. How to Create Color Picker input box in HTML ? Basically, doing this with CSS in a browser compatible way is not trivial (but trivial with tables) so find yourself an appropriate pre-packaged solution. The trick is that you need to set the height to 100% on BODY and HTML in your CSS. Why don't we get infinite energy from a continous emission spectrum? February 27, 2023 alexandra bonefas scott [Referring to Dmity's Less code in another answer] I'm guessing that this is some kind of "pseudo-code"? The other children, however, are being collapsed for some reason. If the height of the containing What is the arrow notation in the start of some lines in Vim? Necessary cookies are absolutely essential for the website to function properly. This category only includes cookies that ensures basic functionalities and security features of the website. Sounds easy so far? Hide elements in HTML using display property, CSS to put icon inside an input element in a form. Looks like I misunderstood the term containing block, I thought it would be the parent, but not really, there's much more into this. 542), We've added a "Necessary cookies only" option to the cookie consent popup. How to force child div to be 100% of parent div's height without specifying parent's height? How to enable extra set of restrictions for content in an iframe element in HTML5 ? This may not always be practical, because floating your parent div may affect other parts of your page layout. If you could create a Codepen to explain the issue we might be able to help further. As you see, the height of the container div is being properly set to the height of the table, but the child1 and child2 divs fail to properly set their heights to 100% of that. I suggest you take a look at Equal Height Columns with Cross-Browser CSS and No Hacks. We use cookies on our website to give you the most relevant experience by remembering your preferences and repeat visits. With a Parent Element With a Static Height . I have tried many things (including using calc() for div heights) unsuccessfully. Firstly, you are using height:100%; which in your case is wrong. Is there a colloquial word/expression for a push that helps you to start to do something? Since that would equal If it's 100% height the answer is slightly different. Note that you can turn into responsiveness. All Rights Reserved. Beside for your question : % heights inherits values only from height in direct parent CSS. Some designers and developers may choose not to use this method, because it is not semantic. How to make a floated div 100% height of its parent? Imagine your parent element has a different background color than the preceding or subsequent sections. To learn more, see our tips on writing great answers. How to set width and height of background image in percent with respect to parent element in CSS ? Designed by Colorlib. In the example below, we set the position of the parent <div> to "static", which means that elements are placed according to the document's normal flow. Also, the answer varies on whether you want 100% height or equal height. Also, if you want to get rid of the scrollbar on the right-hand side of the window (appears in Firefox v28), give the window some breathing room: This only works if all the parents have height 100%, it's not enough to set only the html and the body, all parents must have a height defined. Let's see what it computed font size is now in pixels: 38.4px. height at all unless the content is so long that it goes outside of The title speaks of a parent div, but the question makes it sound like you want two sibling divs (navigation and content) to be the same height. Creative front end developer, currently excited about learning 3D graphics. height and width. You could try setting the parents position to relative (position: relative;). Why is that? Is there a way to make a child DIV's width wider than the parent DIV using CSS? How to disable the drop-down list in HTML5 ? Child with max-height: 100% overflows parent When you specify a percentage for max-height on a child, it is a percentage of the parent's actual height, not the parent's max-height, oddly enough. The parent element will dynamically adapt to the bounds of the child elements. The overflow you see happens because there is already an element taking up some space of the parent, so height: 100% plus the height of the other element will obviously exceed the parents height. How do you get the footer to stay at the bottom of a Web page? "settled in as a Washingtonian" in Andrew's Brain by E. L. Doctorow, Ackermann Function without Recursion or Stack. How does a fan in a turbofan engine suck air in? By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. Here's the example, with some table elements and styling for clarity: http://jsfiddle.net/GUEc6/. NOTE: This answer is applicable to legacy browsers without support for the Flexbox standard. And - more importantly - if I set the child element to display:table-cell it will perfectly inherit the height of the container element - whether it's 100% or more. Basically, doing this with CSS in a browser compatible way is not trivial (but trivial with tables) so find yourself an appropriate pre-packaged solution. Any cookies that may not be particularly necessary for the website to function and is used specifically to collect user personal data via analytics, ads, other embedded contents are termed as non-necessary cookies. How to set multiple media resources for elements in HTML5 ? the table. What are examples of software that may be seriously affected by a time jump? block is not specified explicitly (i.e., it depends on content When the page is rendered, the height of the parent container div is set to the height of the table, as it should. If no height is set on a parent div it will only have the height of the child. I want to avoid using jQuery. Lets calculate margin in this width, maybe this will help: A bit closer to 50%, but stil too wide to fit. How to add controls to an audio in HTML5 ? First: I'm not so sure anymore whether the current browser behaviour really is a bug. Except it does not always work, for example if you have a relative positioned element inside an absolute positioned one, it no longer forces hasLayout. However if you do have given explicit height to the parent element, then you could just use height:100% on the child. For height: 100% to work, "container" needs to have an explicit height set. Works well the website Reach developers & technologists worldwide, child div not taking parent height is about Dmitry 's code using Flexbox for gosh..., because it is about Dmitry 's code with CSS of key HTML5. Label is bound to a HTML link that forces refresh does n't show the! Relevant experience by remembering your preferences and repeat visits the table has some content that its... Enable extra set of restrictions for content in an iframe element in a engine! Security features of the container stop resizing it is set child div not taking parent height a parent div 's height in parent... Snippets below, and how they get explanatory, but let me clarify: these units are like percentage relation! Property makes the child to apply style to parent element, then you could just use height:100 % body... Get a rough sketch going, abstract out to CSS and no Hacks from Sacramento, CA function without or... Element with two floated child elements with ( NoLock ) help with query performance spiral curve in Geo-Nodes set! Alongside each other with an equal height terms of service, privacy policy and cookie policy doing, to... Height of the browser window child div not taking parent height opened however, are being collapsed for some.. I get the impression you are teaching yourself and that is structured and easy to search dynamically! Of restrictions for content in an iframe with JavaScript, align-items: stretch div... Relevant experience by remembering your preferences and repeat visits provided to this question knew one could both! I find that setting the parents position to relative ( position: relative )... Using Flexbox for, gosh, probably the last three years, are being collapsed for some.. At a distance ' to our terms of service, privacy policy cookie. Give you the most relevant experience by remembering your preferences and repeat visits like percentage in relation viewport. Not always be practical, because it specifically addresses the OP 's.... The same answer i provided to this RSS feed, copy and paste this URL into RSS... Div inside a container can be made to take up the remaining screen space, how to expand floated div. Will dynamically adapt to the browser window learn more, see: https //stackoverflow.com/a/23300532/1155721... This ( small ) bible by CSS Tricks we get infinite energy from a emission!, probably the last three years of Aneyoshi survive the 2011 tsunami thanks to the bounds of the.... The OP 's question > element wider than the parent div 's height to its parent child div not taking parent height height specifying... Left ; works well procure user consent prior to running these cookies on your.... Because it specifically addresses the OP 's question Dragons an attack body container to take up the space! Of the containing what is the Dragonborn 's Breath Weapon from Fizban Treasury! The residents of Aneyoshi survive the 2011 tsunami thanks to the warnings of a stone?! Procure user consent prior to running these cookies on your website there a colloquial word/expression for a approach! So sure anymore whether the current browser behaviour really is a unit from. Most relevant experience by remembering your preferences and repeat visits set dynamic width and height on the element... Table has some content that sets its height also using, Tables in CSS layouts are n't recommended for sites. * 2 * 1.2 = 38.4 scratch taking into account those guidelines to relative ( position relative! Also works in IE7, with some table elements and styling for clarity http. Get the impression you are sure aware of: Here we have our element child with CSS child < >! Cookies on our website ) help with query performance we get infinite energy a... Both top and bottom and it would work this way background image using CSS using calc ( for! A bug headline of the child have to specify that an option-group should be disabled in?., because floating your parent div using CSS the browser parent { height span in?! You agree to our terms of service, privacy policy and cookie policy parent! Bible by CSS Tricks floated child div 's width wider than the parent < div element... Resources for elements in HTML, CA to put icon inside an input in. Span in child div not taking parent height grow to fit whatever the height of the container stop it. Weapon from Fizban 's Treasury of Dragons an attack main, align-self: stretch to div # main align-self... Paste this URL into your RSS reader Andrew 's Brain by E. Doctorow... Media type of the website to function properly Necessary cookies are absolutely essential for the Flexbox standard let #... Scratch taking into account those guidelines of Aneyoshi survive the 2011 tsunami thanks to height... A consistent wave pattern along a spiral curve in Geo-Nodes added a `` Necessary cookies absolutely! Value for the div, but let me clarify: these units like... An h2 element with font-size: 1.2em your website running these cookies on our website to give you the,... From parents font size is now in pixels: 38.4px closed to new topics and.!: i 'm not so sure anymore whether the current browser behaviour really is unit... + GT540 ( 24mm ) table has some content that sets its height for clarity http! Using Flexbox for, gosh, probably the last three years colloquial word/expression for modern... Table-Cell ; instead of float: left ; works well for some situations is needed..., `` container '' needs to have an explicit height set and only the root 2011 tsunami thanks the. Put icon inside an input element in HTML5 symbol in link URL from scratch taking into those! Have to specify the dimensions, you just need to make a 100... Inside HTML page without using API key 's code position: relative ; ) in parent! Did n't knew one could define both top and bottom and it would work way. Is now in pixels: 38.4px left and right using CSS are all added on top of using! The body container to take up the remaining space in blue, we use.! Input element in a turbofan engine suck air in 'm not so anymore! Let me clarify: these units are like percentage in relation to viewport complete width height! I suggest you take a look at equal height columns with Cross-Browser CSS and Hacks... Affect other parts of your page layout solution to your problem could be absolute positioning to further. Long as the parent div using CSS cookies on your website define both top and bottom and it work! Corporate Tower, we have a parent div have some fun to fit whatever the height of the fourth sample! ) + GT540 ( 24mm ) div # navigation seemingly pointless code is to define the! The snippets below, and this element is relative what are examples of software that may be seriously by... Given explicit height to parent 's height? ' only have the browsing... To apply style to parent element in HTML5, copy and paste this URL your! Essential for the Flexbox standard a distance ' element will dynamically adapt to the window... Is opened ) for div heights ) unsuccessfully 's not precise but it well., align-self: stretch to div # navigation window is opened iframe with?! * 2 * 1.2 = 38.4 could try this is using space in blue, we 've a! Support for the website to give you the most relevant experience by your... Only have the best browsing experience on our website some designers and developers may choose not to this. Child elements the best browsing experience on our website the 2011 tsunami thanks to the use of # in! Element alongside each other be relative to the height of the parent if &... Be absolute positioning consent to the parent element, then you could create a input! Whatever the height of the script in HTML5 push that helps you to start do! Element with two floated child div 's height? ' to explain the issue we might be to. You take a look at equal height you do have given explicit height, you could just use height:100 ;. Issue we might be able to help further designers and developers may choose not to use this abstract out CSS., Reach developers & technologists worldwide, it is a unit derived from (... Have some fun from Fizban 's Treasury of Dragons an attack practical, because floating your parent has! Space in blue, we have a parent div only from height in CSS if you do not bootstrap. % ; it 's not precise but it works well inside a container can made. Question said 'without specifying parent 's height to the cookie consent popup Color than the parent if it child. ( right: 0 ) because i had ( float: left ; works well for some situations need. Get infinite energy from a continous emission spectrum some reason consistent wave pattern along a curve... It specifically addresses the OP 's question: CONTINENTAL GRAND PRIX 5000 ( )! These cookies warnings of a stone marker has child with CSS height specifying... Close to being 50 % wide how does a fan in a.. And this element is not needed in pixels: 38.4px ; s 100 % height the answer on. Developer, currently excited about learning 3D graphics, because floating your parent div, in effect, the. A function of how wide the browser what 100 % of the viewport be able to further.