Cross Axis

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The cross axis in flexbox runs across the main axis, therefore if your flex-direction and so your main axis is row or row-reverse the cross axis runs down the columns.

The cross axis runs down the column

If your main axis is column or column-reverse then the cross axis runs along the rows.

The cross axis runs along the row.

Alignment of items on the cross axis is achieved with the align-items property on the flex container or align-self property on individual items. In the case of a multi-line flex container, with additional space on the cross axis, you can use align-content to control the spacing of the rows.

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 Contributors to this page: chrisdavidmills, rude9, rachelandrew
 Last updated by: chrisdavidmills,