If you want to center both horizontally and vertically at the same time, there are two easy methods available:
Option One
.outer {
display:flex;
}
.inner {
margin:auto;
}
Option Two
.outer {
display: flex;
justify-content: center;
align-items: center;
}
Wondering about the distinction? And when should one be chosen over the other?
In the initial example provided...
.outer {
display: flex;
}
.inner {
margin: auto;
}
Here, the use of auto margin only centers the specific flex item within the container.
Now, moving on to the second example...
.outer {
display: flex;
justify-content: center;
align-items: center;
}
This method centralizes all items at the container level. All elements will be centered using this code block.
It is important to note that if both techniques are employed simultaneously, margin: auto should take precedence.
8.1. Aligning with auto margins
Prior to alignment via
justify-contentandalign-self, any positive free space is distributed to auto margins in that dimensionIf free space is distributed to auto margins, the alignment properties will have no effect in that dimension because the margins will have stolen all the free space left over after flexing.
One crucial distinction for practical purposes lies in handling cases where a flex item exceeds the container size. In such situations, the container-level approach may cause parts of the item to become inaccessible as they vanish off-screen and resist scrolling attempts.
To effectively address this issue, it is recommended to utilize margin: auto to ensure proper centering functionality.
For further insights, consider checking out these resources:
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