Max number of columns in column-direction flex - CSS

Anna
April 14, 2023
402 views
1 vote
2 Answers

Is it possible to set a maximum number of columns for a column-direction flexbox? I’d like these columns to not create a third column when the second column fills. Instead, I’d prefer if it could overflow such that both the first columns were extended, keeping the order of elements.

Here is a fiddle, my code is also below:

div.columns {
  display: flex;
  flex-wrap: wrap;
  flex-direction: column;
  height: 200px;
  border: 1px solid red;
}

div.columns>div {
  width: 60px;
  padding: 0 8px;
  border: 1px solid black;
}

<div class="columns">
   <div>foo 1</div>
   <div>foo 2</div>
   <div>foo 3</div>
   <div>foo 4</div>
   <div>foo 5</div>
   <div>foo 6</div>
   <div>foo 7</div>
   <div>foo 8</div>
   <div>foo 9</div>
   <div>foo 10</div>
   <div>foo 11</div>
   <div>foo 12</div>
   <div>foo 13</div>
   <div>foo 14</div>
   <div>foo 15</div>
   <div>foo 16</div>
   <div>foo 17</div>
   <div>foo 18</div>
   <div>foo 19</div>
   <div>foo 20</div>
   <div>foo 21</div>
   <div>foo 22</div>
   <div>foo 23</div>
   <div>foo 24</div>
</div>

If flexbox is the wrong tool for this, what would be a better fit? I don’t have to support any old browsers.

Tags: css flexbox

Answers

Flex columns usually require the container to have a fixed height, you might want to try using css columns instead

div.columns {
  columns: 2;
  border: 1px solid red;
}

div.columns>div {
  width: 60px;
  padding: 0 8px;
  border: 1px solid black;
}

<div class="columns">
  <div>foo 1</div>
  <div>foo 2</div>
  <div>foo 3</div>
  <div>foo 4</div>
  <div>foo 5</div>
  <div>foo 6</div>
  <div>foo 7</div>
  <div>foo 8</div>
  <div>foo 9</div>
  <div>foo 10</div>
  <div>foo 11</div>
  <div>foo 12</div>
  <div>foo 13</div>
  <div>foo 14</div>
  <div>foo 15</div>
  <div>foo 16</div>
  <div>foo 17</div>
  <div>foo 18</div>
  <div>foo 19</div>
  <div>foo 20</div>
  <div>foo 21</div>
  <div>foo 22</div>
  <div>foo 23</div>
  <div>foo 24</div>
</div>

As an alternative option, if the number of elements (for example from the backend) and the desired number of columns are known, you can be applied display: grid and grid-auto-flow: column:

* {
  box-sizing: border-box;
}

.columns {
  --col-width: 60px;
  display: grid;
  grid-template-columns: repeat(var(--columns), var(--col-width));
  grid-template-rows: repeat(calc(var(--items) / var(--columns)), auto);
  grid-auto-flow: column;
  grid-gap: 10px;
}

.columns > div {
  width: var(--col-width);
  padding: 0 8px;
  border: 1px solid black;
}

<!-- Suppose you know that there are 24 elements, and you need to create 3 columns 👇  -->
<div class="columns" style="--items: 24;--columns: 3;">
  <div>foo 1</div>
  <div>foo 2</div>
  <div>foo 3</div>
  <div>foo 4</div>
  <div>foo 5</div>
  <div>foo 6</div>
  <div>foo 7</div>
  <div>foo 8</div>
  <div>foo 9</div>
  <div>foo 10</div>
  <div>foo 11</div>
  <div>foo 12</div>
  <div>foo 13</div>
  <div>foo 14</div>
  <div>foo 15</div>
  <div>foo 16</div>
  <div>foo 17</div>
  <div>foo 18</div>
  <div>foo 19</div>
  <div>foo 20</div>
  <div>foo 21</div>
  <div>foo 22</div>
  <div>foo 23</div>
  <div>foo 24</div>
</div>

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Max number of columns in column-direction flex – CSS

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