# Button


> ![icon-note.gif](public_sys-resources/icon-note.gif) **NOTE**
>
> This component is supported since API version 7. Updates will be marked with a superscript to indicate their earliest API version.


The **<Button>** component represents a component that can trigger actions.


## Required Permissions

None


## Child Components

Supported


## APIs

- Button(options?: {type?: ButtonType, stateEffect?: boolean})
  
  **Table 1** options parameters
  
  | Name | Type | Mandatory | Default Value | Description |
  | -------- | -------- | -------- | -------- | -------- |
  | type | ButtonType | No | Capsule | Button type. |
  | stateEffect | boolean | No | true | Whether to enable the state switchover effect when a button is pressed. When the state is set to **false**, the state switchover effect is disabled. |


- Button(label?: string, options?: { type?: ButtonType, stateEffect?: boolean })
  
  Creates a button component based on text content. In this case, the **<Button>** component cannot contain child components.

  **Table 2** value parameters

| Name | Type | Mandatory | Default Value | Description |
| -------- | -------- | -------- | -------- | -------- |
| label | string | No | - | Button text. |
| options | Object | No | - | For details, see the **options** parameters. |


## Attributes

| Name | Type | Default Value | Description |
| -------- | -------- | -------- | -------- |
| type | ButtonType | Capsule | Button type. |
| stateEffect | boolean | true | Whether to enable the state switchover effect. When the state is set to **false**, the state switchover effect is disabled. |

- ButtonType enums
    | Name | Description |
  | -------- | -------- |
  | Capsule | Capsule-type button (the round corner is half of the height by default). |
  | Circle | Circle button. |
  | Normal | Normal button (without rounded corners by default). |

> ![icon-note.gif](public_sys-resources/icon-note.gif) **NOTE**
> - The rounded corner of a button is set by using [Border](ts-universal-attributes-border.md). (The rounded corner cannot be set by using a border API.)
> - When the button type is **Capsule**, the **borderRadius** settings do not take effect, and the rounded corner of the button is always half of the button height. 
> - When the button type is **Circle**, the value of **borderRadius** is used as the button radius. If **borderRadius** is not set, the button radius is half of the width or height, whichever is smaller. 
> - The button text is set using the [common text style](ts-universal-attributes-text-style.md).


## Example


```
@Entry
@Component
struct ButtonExample {
  build() {
    Flex({ direction: FlexDirection.Column, alignItems: ItemAlign.Start, justifyContent: FlexAlign.SpaceBetween }) {
      Text('Common button').fontSize(9).fontColor(0xCCCCCC)
      Flex({ alignItems: ItemAlign.Center, justifyContent: FlexAlign.SpaceBetween }) {
        Button('Ok', { type: ButtonType.Normal, stateEffect: true }).borderRadius(8).backgroundColor(0x317aff).width(90)
        Button({ type: ButtonType.Normal, stateEffect: true }) {
          Row() {
            Image($r('app.media.loading')).width(20).height(20).margin({ left: 12 })
            Text('loading').fontSize(12).fontColor(0xffffff).margin({ left: 5, right: 12 })
          }.alignItems(VerticalAlign.Center)
        }.borderRadius(8).backgroundColor(0x317aff).width(90)
        Button('Disable', { type: ButtonType.Normal, stateEffect: false }).opacity(0.5)
          .borderRadius(8).backgroundColor(0x317aff).width(90)
      }

      Text('Capsule button').fontSize(9).fontColor(0xCCCCCC)
      Flex({ alignItems: ItemAlign.Center, justifyContent: FlexAlign.SpaceBetween }) {
        Button('Ok', { type: ButtonType.Capsule, stateEffect: true }).backgroundColor(0x317aff).width(90)
        Button({ type: ButtonType.Capsule, stateEffect: true }) {
          Row() {
            Image($r('app.media.loading')).width(20).height(20).margin({ left: 12 })
            Text('loading').fontSize(12).fontColor(0xffffff).margin({ left: 5, right: 12 })
          }.alignItems(VerticalAlign.Center).width(90)
        }.backgroundColor(0x317aff)
        .onClick((event: ClickEvent) => {
          AlertDialog.show({ message: 'The login is successful' })
        })
        Button('Disable', { type: ButtonType.Capsule, stateEffect: false }).opacity(0.5)
          .backgroundColor(0x317aff).width(90)
      }

      Text('Circle button').fontSize(9).fontColor(0xCCCCCC)
      Flex({ alignItems: ItemAlign.Center, wrap: FlexWrap.Wrap }) {
        Button({ type: ButtonType.Circle, stateEffect: true }) {
          Image($r('app.media.ic_public_app_filled')).width(20).height(20)
        }.width(55).height(55).backgroundColor(0x317aff)
        Button({ type: ButtonType.Circle, stateEffect: true }) {
          Image($r('app.media.ic_public_delete_filled')).width(30).height(30)
        }.width(55).height(55).margin({ left: 20 }).backgroundColor(0xF55A42)
      }
    }.height(400).padding({ left: 35, right: 35, top: 35 })
  }
}
```

![en-us_image_0000001257138341](figures/en-us_image_0000001257138341.gif)