To control this, we are going to change our last clamp() formula, from this: clamp(100%/(N + 1) + 0.1%, 400px, 100%) We don’t really know when it happens because it depends a number of things, like the base width, the gap, the container width, etc. So far, we’ve had no control over when elements wrap from one line to another. ⚠️ Partial control of the number of items per row.Clever, right? No more worrying about the gap! The logic is: we tell the browser that each item has a width equal to 100%/(N + 1) so N + 1 items per row, but we add a tiny percentage ( 0.1%)-thus one of the items wraps and we end with only N items per row. ![]() Yes, we need to account for the gap when defining the width, but don’t worry, we can still optimize the formula to remove it! ![]() When we have three items on a row, there are two gaps between elements (one on each on the left and right sides of the middle element), so for N items we should use max(400px, 100%/N - (N - 1) * gap). It’s twice the grid template’s gap value, which is 10px times two. You might also be asking: What the heck is that 20px value in the formula? When the screen width is small, 400px takes the lead and we get our initial behavior.So, we get a maximum of three elements per row. Since we are using the max() function as the width and are dividing 100% by 3 in it, the largest any single element can be is just one-third of the overall container width.When the screen width increases, the width of our container also increases, meaning that 100%/3 gets bigger than 400px at some point.We have limited each line to a maximum of three elements, meaning each line only contains between one and three items at any given time. Resize the screen and notice that each row never has more than three items, even on a super wide screen. Let’s take our first example and change flex: 400px to flex: max(400px, 100%/3 - 20px). But we can overcome those with some CSS trickery. ✔️ Consistent element widths in the footerīoth of the techniques we just looked at are good, but we also now see they come with a few drawbacks.So, we improved one of requirements and solved another, but also introduced a new issue since our items cannot shrink below 400px which may lead to some overflow. That means the elements on each line also grow to fill any remaining space, but unlike the flexbox configuration, the last row maintains the same width as the rest of the elements. This time, though we’re reaching for CSS Grid. Similar to the previous method, we are setting a base width-thanks to repeat(auto-fit, minmax(400px, 1fr))-and our items wrap if there’s enough space for them. Using Flexbox, you can start solving this problem by wrapping the items in the container with flex-wrap, setting your base width with flex-basis and then filling the space with flex-grow. ![]() To put this in picture, this is what the container would look like with 3 columns in a large device: Now, a very important requirement is that, although growing, all items must have the same width. This way, when resizing the window, the number of columns may change to fit the max number of elements respecting the base width. What this means is that the items can grow to fill in blank spaces, but they cannot shrink. ![]() The items have a base width, but you want them to adjust to fill the space of the row. The number of elements may vary and you wish to display them in N columns for large media devices. Let's suppose you have a responsive container with an unknown number of elements. Although simple, you might face a few problems when approaching this issue. Mozilla Developer NetworkĮlements distributed through columns and equal height rows are a common UI pattern which can be easily solved using Flexbox. For many applications, the flexible box model provides an improvement over the block model in that it does not use floats, nor do the flex container's margins collapse with the margins of its contents. The CSS3 Flexible Box, or Flexbox, is a layout mode providing for the arrangement of elements on a page such that the elements behave predictably when the page layout must accommodate different screen sizes and different display devices.
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