# Flex


> **NOTE**<br/>
> This component is supported since API version 7. Updates will be marked with a superscript to indicate their earliest API version.


The **\<Flex>** component allows for an elastic layout.


## Required Permissions

None


## Child Components

This component can contain child components.


## APIs

Flex(options?: { direction?: FlexDirection, wrap?: FlexWrap,  justifyContent?: FlexAlign, alignItems?: ItemAlign, alignContent?: FlexAlign })

Creates a standard **\<Flex>** component.

- Parameters
  | Name | Type | Mandatory | Default Value | Description |
  | -------- | -------- | -------- | -------- | -------- |
  | direction | FlexDirection | No | FlexDirection.Row | Direction in which child components are arranged in the **\<Flex>** component, that is, the direction of the main axis. |
  | wrap | FlexWrap | No | FlexWrap.NoWrap | Whether the **\<Flex>** component has a single line or multiple lines. |
  | justifyContent | FlexAlign | No | FlexAlign.Start | Alignment mode of the child components in the **\<Flex>** component along the main axis. |
  | alignItems | [ItemAlign](ts-appendix-enums.md#itemalign-enums) | No | ItemAlign.Stretch | Alignment mode of the child components in the **\<Flex>** component along the cross axis. |
  | alignContent | FlexAlign | No | FlexAlign.Start | Alignment mode of the child components in a multi-line **\<Flex>** component along the cross axis. This parameter is valid only when **wrap** is set to **Wrap** or **WrapReverse**. |

- FlexDirection enums
  | Name | Description |
  | -------- | -------- |
  | Row | The child components are arranged in the same direction as the main axis runs along the rows. |
  | RowReverse | The child components are arranged opposite to the **Row** direction. |
  | Column | The child components are arranged in the same direction as the main axis runs down the columns. |
  | ColumnReverse | The child components are arranged opposite to the **Column** direction. |

- FlexWrap enums
  | Name | Description |
  | -------- | -------- |
  | NoWrap | The child components in the **&lt;Flex&gt;** component are arranged in a single line, and they may overflow. |
  | Wrap | The child components in the **&lt;Flex&gt;** component are arranged in multiple lines, and they may overflow. |
  | WrapReverse | The child components in the **&lt;Flex&gt;** component are reversely arranged in multiple lines, and they may overflow. |

- FlexAlign enums
  | Name | Description |
  | -------- | -------- |
  | Start | The child components are aligned with the start edge of the main axis. The first component is aligned with the main-start, and subsequent components are aligned with the previous one. |
  | Center | The child components are aligned in the center of the main axis. The space between the first component and the main-start is the same as that between the last component and the main-end. |
  | End | The child components are aligned with the end edge of the main axis. The last component is aligned with the main-end, and other components are aligned with the next one. |
  | SpaceBetween | The child components are evenly distributed along the main axis. The first component is aligned with the main-start, the last component is aligned with the main-end, and the remaining components are distributed so that the space between any two adjacent components is the same. |
  | SpaceAround | The child components are evenly distributed along the main axis, with a half-size space on either end. The space between any two adjacent components is the same. The space between the first component and main-start, and that between the last component and cross-main are both half the size of the space between two adjacent components. |
  | SpaceEvenly | The child components are equally distributed along the main axis. The space between the first component and main-start, the space between the last component and main-end, and the space between two adjacent components are the same. |


## Example

```
// Example 01
@Entry
@Component
struct FlexExample1 {
  build() {
    Column() {
      Column({ space: 5 }) {
        Text('direction:Row').fontSize(9).fontColor(0xCCCCCC).width('90%')
        Flex({ direction: FlexDirection.Row }) {
          Text('1').width('20%').height(50).backgroundColor(0xF5DEB3)
          Text('2').width('20%').height(50).backgroundColor(0xD2B48C)
          Text('3').width('20%').height(50).backgroundColor(0xF5DEB3)
          Text('4').width('20%').height(50).backgroundColor(0xD2B48C)
        }
        .height(70)
        .width('90%')
        .padding(10)
        .backgroundColor(0xAFEEEE)

        Text('direction:RowReverse').fontSize(9).fontColor(0xCCCCCC).width('90%')
        Flex({ direction: FlexDirection.RowReverse }) {
          Text('1').width('20%').height(50).backgroundColor(0xF5DEB3)
          Text('2').width('20%').height(50).backgroundColor(0xD2B48C)
          Text('3').width('20%').height(50).backgroundColor(0xF5DEB3)
          Text('4').width('20%').height(50).backgroundColor(0xD2B48C)
        }
        .height(70)
        .width('90%')
        .padding(10)
        .backgroundColor(0xAFEEEE)

        Text('direction:Column').fontSize(9).fontColor(0xCCCCCC).width('90%')
        Flex({ direction: FlexDirection.Column }) {
          Text('1').width('100%').height(40).backgroundColor(0xF5DEB3)
          Text('2').width('100%').height(40).backgroundColor(0xD2B48C)
          Text('3').width('100%').height(40).backgroundColor(0xF5DEB3)
          Text('4').width('100%').height(40).backgroundColor(0xD2B48C)
        }
        .height(160)
        .width('90%')
        .padding(10)
        .backgroundColor(0xAFEEEE)

        Text('direction:ColumnReverse').fontSize(9).fontColor(0xCCCCCC).width('90%')
        Flex({ direction: FlexDirection.ColumnReverse }) {
          Text('1').width('100%').height(40).backgroundColor(0xF5DEB3)
          Text('2').width('100%').height(40).backgroundColor(0xD2B48C)
          Text('3').width('100%').height(40).backgroundColor(0xF5DEB3)
          Text('4').width('100%').height(40).backgroundColor(0xD2B48C)
        }
        .height(160)
        .width('90%')
        .padding(10)
        .backgroundColor(0xAFEEEE)
      }.width('100%').margin({ top: 5 })
    }.width('100%')
  }
}
```

![en-us_image_0000001256978365](figures/en-us_image_0000001256978365.gif)


```
// Example 02
@Entry
@Component
struct FlexExample2 {
  build() {
    Column() {
      Column({ space: 5 }) {
        Text('Wrap').fontSize(9).fontColor(0xCCCCCC).width('90%')
        Flex({ wrap: FlexWrap.Wrap }) {
          Text('1').width('50%').height(50).backgroundColor(0xF5DEB3)
          Text('2').width('50%').height(50).backgroundColor(0xD2B48C)
          Text('3').width('50%').height(50).backgroundColor(0xD2B48C)
        }
        .width('90%')
        .padding(10)
        .backgroundColor(0xAFEEEE)

        Text('NoWrap').fontSize(9).fontColor(0xCCCCCC).width('90%')
        Flex({ wrap: FlexWrap.NoWrap }) {
          Text('1').width('50%').height(50).backgroundColor(0xF5DEB3)
          Text('2').width('50%').height(50).backgroundColor(0xD2B48C)
          Text('3').width('50%').height(50).backgroundColor(0xF5DEB3)
        }
        .width('90%')
        .padding(10)
        .backgroundColor(0xAFEEEE)

        Text('WrapReverse').fontSize(9).fontColor(0xCCCCCC).width('90%')
        Flex({ wrap: FlexWrap.WrapReverse , direction:FlexDirection.Row }) {
          Text('1').width('50%').height(50).backgroundColor(0xF5DEB3)
          Text('2').width('50%').height(50).backgroundColor(0xD2B48C)
          Text('3').width('50%').height(50).backgroundColor(0xD2B48C)
        }
        .width('90%')
        .height(120)
        .padding(10)
        .backgroundColor(0xAFEEEE)
      }.width('100%').margin({ top: 5 })
    }.width('100%')
  }
}
```

![en-us_image_0000001211898500](figures/en-us_image_0000001211898500.png)


```
// Example 03
@Component
struct JustifyContentFlex {
  @Prop justifyContent : number

  build() {
    Flex({ justifyContent: this.justifyContent }) {
      Text('1').width('20%').height(50).backgroundColor(0xF5DEB3)
      Text('2').width('20%').height(50).backgroundColor(0xD2B48C)
      Text('3').width('20%').height(50).backgroundColor(0xF5DEB3)
    }
    .width('90%')
    .padding(10)
    .backgroundColor(0xAFEEEE)
  }
}

@Entry
@Component
struct FlexExample3 {
  build() {
    Column() {
      Column({ space: 5 }) {
        Text('justifyContent:Start').fontSize(9).fontColor(0xCCCCCC).width('90%')
        JustifyContentFlex({ justifyContent: FlexAlign.Start })

        Text('justifyContent:Center').fontSize(9).fontColor(0xCCCCCC).width('90%')
        JustifyContentFlex({ justifyContent: FlexAlign.Center })

        Text('justifyContent:End').fontSize(9).fontColor(0xCCCCCC).width('90%')
        JustifyContentFlex({ justifyContent: FlexAlign.End })

        Text('justifyContent:SpaceBetween').fontSize(9).fontColor(0xCCCCCC).width('90%')
        JustifyContentFlex({ justifyContent: FlexAlign.SpaceBetween })

        Text('justifyContent:SpaceAround').fontSize(9).fontColor(0xCCCCCC).width('90%')
        JustifyContentFlex({ justifyContent: FlexAlign.SpaceAround })

        Text('justifyContent:SpaceEvenly').fontSize(9).fontColor(0xCCCCCC).width('90%')
        JustifyContentFlex({ justifyContent: FlexAlign.SpaceEvenly })
      }.width('100%').margin({ top: 5 })
    }.width('100%')
  }
}
```

![en-us_image_0000001212218462](figures/en-us_image_0000001212218462.gif)


```
// Example 04
@Component
struct AlignItemsFlex {
  @Prop alignItems : number

  build() {
    Flex({ alignItems: this.alignItems }) {
      Text('1').width('33%').height(30).backgroundColor(0xF5DEB3)
      Text('2').width('33%').height(40).backgroundColor(0xD2B48C)
      Text('3').width('33%').height(50).backgroundColor(0xF5DEB3)
    }
    .size({width: '90%', height: 80})
    .padding(10)
    .backgroundColor(0xAFEEEE)
  }
}

@Entry
@Component
struct FlexExample4 {
  build() {
    Column() {
      Column({ space: 5 }) {
        Text('alignItems:Auto').fontSize(9).fontColor(0xCCCCCC).width('90%')
        AlignItemsFlex({ alignItems: ItemAlign.Auto })

        Text('alignItems:Start').fontSize(9).fontColor(0xCCCCCC).width('90%')
        AlignItemsFlex({ alignItems: ItemAlign.Start })

        Text('alignItems:Center').fontSize(9).fontColor(0xCCCCCC).width('90%')
        AlignItemsFlex({ alignItems: ItemAlign.Center })

        Text('alignItems:End').fontSize(9).fontColor(0xCCCCCC).width('90%')
        AlignItemsFlex({ alignItems: ItemAlign.End })

        Text('alignItems:Stretch').fontSize(9).fontColor(0xCCCCCC).width('90%')
        AlignItemsFlex({ alignItems: ItemAlign.Stretch })

        Text('alignItems:Baseline').fontSize(9).fontColor(0xCCCCCC).width('90%')
        AlignItemsFlex({ alignItems: ItemAlign.Baseline })
      }.width('100%').margin({ top: 5 })
    }.width('100%')
  }
}
```

![en-us_image_0000001257138371](figures/en-us_image_0000001257138371.jpg)

![en-us_image_0000001212378426](figures/en-us_image_0000001212378426.gif)


```
// Example 05
@Component
struct AlignContentFlex {
  @Prop alignContent: number

  build() {
    Flex({ wrap: FlexWrap.Wrap, alignContent: this.alignContent }) {
      Text('1').width('50%').height(20).backgroundColor(0xF5DEB3)
      Text('2').width('50%').height(20).backgroundColor(0xD2B48C)
      Text('3').width('50%').height(20).backgroundColor(0xD2B48C)
    }
    .size({ width: '90%', height: 90 })
    .padding(10)
    .backgroundColor(0xAFEEEE)
  }
}

@Entry
@Component
struct FlexExample5 {
  build() {
    Column() {
      Column({ space: 5 }) {
        Text('alignContent:Start').fontSize(9).fontColor(0xCCCCCC).width('90%')
        AlignContentFlex({ alignContent: FlexAlign.Start })

        Text('alignContent:Center').fontSize(9).fontColor(0xCCCCCC).width('90%')
        AlignContentFlex({ alignContent: FlexAlign.Center })

        Text('alignContent:End').fontSize(9).fontColor(0xCCCCCC).width('90%')
        AlignContentFlex({ alignContent: FlexAlign.End })

        Text('alignContent:SpaceBetween').fontSize(9).fontColor(0xCCCCCC).width('90%')
        AlignContentFlex({ alignContent: FlexAlign.SpaceBetween })

        Text('alignContent:SpaceAround').fontSize(9).fontColor(0xCCCCCC).width('90%')
        AlignContentFlex({ alignContent: FlexAlign.SpaceAround })

        Text('alignContent:SpaceEvenly').fontSize(9).fontColor(0xCCCCCC).width('90%')
        AlignContentFlex({ alignContent: FlexAlign.SpaceEvenly })
      }.width('100%').margin({ top: 5 })
    }.width('100%')
  }
}
```

![en-us_image_0000001256858413](figures/en-us_image_0000001256858413.gif)