![]() This displays the components side-by-side, provided there is sufficient width for the container when it is displayed at runtime. You can specify multiple columns within the container. They appear as a table with one component per row. Typically, when the view is displayed, the view components are stacked vertically and the components are all wrapped. Container view components with multi-column-A container has other view components within it.The responsive layout is mainly controlled by the following components: A button bar adapts to the dropdown list of buttons. ![]() For example, the tab panel uses an accordian layout and the record grid uses a card layout. Several out-of-the-box view components adjust their layouts based on their width. To preview the design, you can also simulate the layouts on various devices. This feature is useful on mobile device browsers such as smartphones, tablets, and so on. In responsive layouts, the components wrap vertically when the width of the browser's viewport is not sufficient to display them as laid out in the View designer. Add a way to store these custom values (using either a database, cookies or local storage) and you have the base of a personalization system based on user preferences.BMC Helix Innovation Studio is rendered with a responsive layout in browsers. This time the user has control over the size of the interface, adjusting it to fit his needs. In the second example we do the same alteration using JavaScript. See the Pen Dynamic Sizing of Modules with Rem Units by SitePoint ( on CodePen. As element padding values and margins are expressed using rem, the entire component scales with the device size. Just like in the previous section, the purpose is to customize the reading experience for the device used. In this first example, we change the root font size using media queries. Using rem Units for Scaling Documents Demo #1 Let’s see how this thing works using a couple of examples. By expressing widths, margins, and padding in rem units, it becomes possible to create an interface that grows or shrinks in tune with the root font size. Zurb Foundation (currently at v6.5.3 at the moment this was written) makes use of em units in the media queries.Ī third use we can find for rem units is to build scalable components. The only way to change the media query breakpoint values is to modify the default font size in the browser settings.įor this reason, it doesn’t really matter if we use em or rem units for media query breakpoints. None of the font-size changes we declared had any effect on the breakpoints. As we change the width of the browser window we can see that the first media query kicks in at 320px (20 × 16px) while the second one becomes active at 480px (30 × 16px). We begin with the 62.5% trick to show that the modified root font size does not have any effect on the values used for the media queries. It was not a new discovery, by any means, as it was already used with em units: body ) For this reason, Snook used a trick called “ 62.5%“. Let’s see an example of some common font sizes expressed in rem units, assuming, of course, that the base size is 16px:Īs we can see, these values are not very convenient for making calculations. The main issue with using rem for font sizing is that the values are somewhat difficult to use. ![]() However, as we saw earlier, it is very easy to lose track of nesting and get unexpected results with em units. ![]() Like many other CSS developers, he had to face the problems that em units bring in complex layouts.Īt that time, older versions of IE still had large market shares and they were unable to zoom text that was sized with pixels. One of the pioneers of using rem units for font sizing is Jonathan Snook with his Font sizing with REM article, back in May, 2011. ![]()
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