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118 lines
4.5 KiB
Markdown
118 lines
4.5 KiB
Markdown
---
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title: Alert
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lang: en-US
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---
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# Alert
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Displays important alert messages.
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## Basic Usage
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Alert components are non-overlay elements in the page that does not disappear automatically.
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:::demo Alert provides 5 types of themes defined by `type`, whose default value is `info`. `primary` has been added in ^(2.9.11).
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alert/basic
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:::
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## Theme
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Alert provide two different themes, `light` and `dark`.
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:::demo Set `effect` to change theme, default is `light`.
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alert/theme
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:::
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## Customizable Close Button
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Customize the close button as texts or other symbols.
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:::demo Alert allows you to configure if it's closable. The close button text and closing callbacks are also customizable. `closable` attribute decides if the component can be closed or not. It accepts `boolean`, and the default is `true`. You can set `close-text` attribute to replace the default cross symbol as the close button. Be careful that `close-text` must be a string. `close` event fires when the component is closed.
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alert/close-button
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:::
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## With Icon
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Displaying an icon improves readability.
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:::demo Setting the `show-icon` attribute displays an icon that corresponds with the current Alert type. Or use the `icon` slot to customize icon.
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alert/icon
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:::
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## Centered Text
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Use the `center` attribute to center the text.
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:::demo
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alert/center
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:::
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## With Description
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Description includes a message with more detailed information.
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:::demo Besides the required `title` attribute, you can add a `description` attribute to help you describe the alert with more details. Description can only store text string, and it will word wrap automatically.
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alert/description
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:::
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## With Icon and Description
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:::demo At last, this is an example with both icon and description.
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alert/icon-description
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:::
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## With Delayed Attributes ^(2.10.0)
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:::demo At last, this is an example with delayed attributes.
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alert/delayed
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:::
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## Alert API
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### Attributes
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| Name | Description | Type | Default |
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| -------------------- | ---------------------------------------- | -------------------------------------------------------------------------- | ------- |
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| title | alert title. | ^[string] | — |
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| type | alert type. | ^[enum]`'primary' (2.9.11) \| 'success' \| 'warning' \| 'info' \| 'error'` | info |
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| description | descriptive text. | ^[string] | — |
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| closable | whether alert can be dismissed. | ^[boolean] | true |
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| center | whether content is placed in the center. | ^[boolean] | false |
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| close-text | customized close button text. | ^[string] | — |
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| show-icon | whether a type icon is displayed. | ^[boolean] | false |
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| effect | theme style. | ^[enum]`'light' \| 'dark'` | light |
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| show-after ^(2.10.0) | delay of appearance, in millisecond | ^[number] | 0 |
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| hide-after ^(2.10.0) | delay of disappear, in millisecond | ^[number] | 200 |
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| auto-close ^(2.10.0) | timeout in milliseconds to hide alert | ^[number] | 0 |
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### Events
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| Name | Description | Type |
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| -------------- | ----------------------------- | ------------------------------------ |
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| open ^(2.10.0) | trigger when alert is opened. | ^[Function]`() => void` |
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| close | trigger when alert is closed. | ^[Function]`(event?: Event) => void` |
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### Slots
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| Name | Description |
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| ------------- | --------------------------------- |
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| default | content of the alert description. |
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| title | content of the alert title. |
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| icon ^(2.9.7) | content of the alert icon. |
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