j.grima j.grima - 7 days ago 9
CSS Question

Removing space between multiple lines of flex items

I am trying to have a number of items underneath each other in a container with a set height. Items will then carry on next to each other if there's no space left.

This is the idea:



I am trying to achieve this using flexbox, a container with a set height, direction is set to

column
and
flex-wrap
is
wrap
:

The issue is that there are wide gaps between the columns.

enter image description here

I tried setting both
justify-content
and
align-items
to
flex-start
, but that is probably the default value.

Is there any way to solve this?

Here is the code:



* {
box-sizing: border-box;
}
body {
font-family: sans-serif;
}
.container {
display: flex;
flex-wrap: wrap;
height: 300px;
flex-direction: column;
background-color: #ccc;
}
.items {
width: 100px;
height: 100px;
margin: 10px;
background-color: tomato;
color: white;
font-size: 60px;
font-weight: bold;
text-align: center;
padding: 15px;
}

<div class="container">
<div class="items">1</div>
<div class="items">2</div>
<div class="items">3</div>
<div class="items">4</div>
<div class="items">5</div>
</div>





codepen

Answer

An initial value of a flex container is align-content: stretch.

This means that multiple lines of flex items will be distributed evenly along the cross axis.

To override that behavior, apply align-content: flex-start to the container.


When you're working in a single-line flex container (i.e., flex-wrap: nowrap), the properties to use to distribute space along the cross axis are align-items and align-self.

When you're working in a multi-line flex container (i.e., flex-wrap: wrap) – like in the question – the property to use to distribute space along the cross axis is align-content.

From the spec:

8.3. Cross-axis Alignment: the align-items and align-self properties

align-items sets the default alignment for all of the flex container’s items, including anonymous flex items. align-self allows this default alignment to be overridden for individual flex items.

8.4. Packing Flex Lines: the align-content property

The align-content property aligns a flex container’s lines within the flex container when there is extra space in the cross-axis, similar to how justify-content aligns individual items within the main-axis. Note, this property has no effect on a single-line flex container.

The align-content property takes six values:

  • flex-start
  • flex-end
  • center
  • space-between
  • space-around
  • stretch

Here's the definition for stretch:

stretch

Lines stretch to take up the remaining space. If the leftover free-space is negative, this value is identical to flex-start. Otherwise, the free-space is split equally between all of the lines, increasing their cross size.