> For the complete documentation index, see [llms.txt](https://react-native.books.c-k.dev/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://react-native.books.c-k.dev/styling/flexbox/flexdirection.md).
# flexDirection
Used to determine the item flow direction
```jsx
flex=1
// This properties indicates the layout occupation percentage.
// The occupation of layout is depends on {value}/{num of item in the same level}
// Given
// occupy 1/4
// occupy 2/4
// occupy 1/4
// This property means that
// “please expand this component to fill the entire area content of the device”
```
