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Flexbox: 4 items per row

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南笙
南笙 2020-11-22 13:01

I\'m using a flex box to display 8 items that will dynamically resize with my page. How do I force it to split the items into two rows? (4 per row)?

Here is a releva

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  • 情话喂你
    2020-11-22 13:10

    I believe this example is more barebones and easier to understand then @dowomenfart.

    .child {
    display: inline-block;
    margin: 0 1em;
    flex-grow: 1;
    width: calc(25% - 2em);
}

    This accomplishes the same width calculations while cutting straight to the meat. The math is way easier and em is the new standard due to its scalability and mobile-friendliness.

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  • 忘了有多久
    2020-11-22 13:13 

    .parent-wrapper {
	height: 100%;
	width: 100%;
	border: 1px solid black;
}
	.parent {
	display: flex;
	font-size: 0;
	flex-wrap: wrap;
	margin-right: -10px;
	margin-bottom: -10px;
}
	.child {
	background: blue;
	height: 100px;
	flex-grow: 1;
	flex-shrink: 0;
	flex-basis: calc(25% - 10px);
}
	.child:nth-child(even) {
	margin: 0 10px 10px 10px;
	background-color: lime;
}
	.child:nth-child(odd) {
	background-color: orange; 
}
    <!DOCTYPE html>
<html lang="en">
<head>
	<meta charset="UTF-8">
	<title>Document</title>
	<style type="text/css">

	</style>
</head>
<body>
  <div class="parent-wrapper">
    <div class="parent">
      <div class="child"></div>
      <div class="child"></div>
      <div class="child"></div>
      <div class="child"></div>
      <div class="child"></div>
      <div class="child"></div>
      <div class="child"></div>
      <div class="child"></div>
    </div>
  </div>
</body>
</html>

    ;)

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  • -上瘾入骨i
    2020-11-22 13:16

    Hope it helps. for more detail you can follow this Link

    .parent{ 
  display: flex; 
  flex-wrap: wrap; 
}

.parent .child{ 
  flex: 1 1 25%;
  /*Start Run Code Snippet output CSS*/
  padding: 5px; 
  box-sizing: border-box;
  text-align: center;
  border: 1px solid #000;
  /*End Run Code Snippet output CSS*/
}
    <div class="parent">
  <div class="child">1</div>
  <div class="child">2</div>
  <div class="child">3</div>
  <div class="child">4</div>
  <div class="child">5</div>
  <div class="child">6</div>
  <div class="child">7</div>
  <div class="child">8</div>
</div>

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  • 野趣味
    2020-11-22 13:19

    Here is another apporach.

    You can accomplish it in this way too:

    .parent{
  display: flex;
  flex-wrap: wrap;
}

.child{
  width: 25%;
  box-sizing: border-box;
}

    Sample: https://codepen.io/capynet/pen/WOPBBm

    And a more complete sample: https://codepen.io/capynet/pen/JyYaba

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  • 轮回少年
    2020-11-22 13:19

    Here's another way without using calc().

    // 4 PER ROW
// 100 divided by 4 is 25. Let's use 21% for width, and the remainder 4% for left & right margins...
.child {
  margin: 0 2% 0 2%;
  width: 21%;
}

// 3 PER ROW
// 100 divided by 3 is 33.3333... Let's use 30% for width, and remaining 3.3333% for sides (hint: 3.3333 / 2 = 1.66666)
.child {
  margin: 0 1.66666% 0 1.66666%;
  width: 30%;
}

// and so on!

    That's all there is to it. You can get fancy with the dimensions to get a more aesthetic sizes but this is the idea.

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  • 灰色年华
    2020-11-22 13:23

    You've got flex-wrap: wrap on the container. That's good, because it overrides the default value, which is nowrap (source). This is the reason items don't wrap to form a grid in some cases.

    In this case, the main problem is flex-grow: 1 on the flex items.

    The flex-grow property doesn't actually size flex items. Its task is to distribute free space in the container (source). So no matter how small the screen size, each item will receive a proportional part of the free space on the line.

    More specifically, there are eight flex items in your container. With flex-grow: 1, each one receives 1/8 of the free space on the line. Since there's no content in your items, they can shrink to zero width and will never wrap.

    The solution is to define a width on the items. Try this:

    .parent {
  display: flex;
  flex-wrap: wrap;
}

.child {
  flex: 1 0 21%; /* explanation below */
  margin: 5px;
  height: 100px;
  background-color: blue;
}
    <div class="parent">
  <div class="child"></div>
  <div class="child"></div>
  <div class="child"></div>
  <div class="child"></div>
  <div class="child"></div>
  <div class="child"></div>
  <div class="child"></div>
  <div class="child"></div>
</div>

    With flex-grow: 1 defined in the flex shorthand, there's no need for flex-basis to be 25%, which would actually result in three items per row due to the margins.

    Since flex-grow will consume free space on the row, flex-basis only needs to be large enough to enforce a wrap. In this case, with flex-basis: 21%, there's plenty of space for the margins, but never enough space for a fifth item.

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