element-plus/docs/en-US/component/alert.md
2022-03-24 15:35:15 +08:00

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---
title: Alert
lang: en-US
---
# Alert
Displays important alert messages.
## Basic Usage
Alert components are non-overlay elements in the page that does not disappear automatically.
:::demo Alert provides 4 types of themes defined by `type`, whose default value is `info`.
alert/basic
:::
## Theme
Alert provide two different themes, `light` and `dark`.
:::demo Set `effect` to change theme, default is `light`.
alert/theme
:::
## Customizable Close Button
Customize the close button as texts or other symbols.
:::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.
alert/close-button
:::
## With Icon
Displaying an icon improves readability.
:::demo Setting the `show-icon` attribute displays an icon that corresponds with the current Alert type.
alert/icon
:::
## Centered Text
Use the `center` attribute to center the text.
:::demo
alert/center
:::
## With Description
Description includes a message with more detailed information.
:::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.
alert/description
:::
## With Icon and Description
:::demo At last, this is an example with both icon and description.
alert/icon-description
:::
## Alert API
### Alert Attributes
| Name | Description | Type | Default | Required |
| ------------- | --------------------------------- | --------------------------------------------- | --------- | -------- |
| `title` | alert title. | `string` | — | No |
| `type` | alert type. | `'success' \| 'warning' \| 'info' \| 'error'` | `'info'` | No |
| `description` | descriptive text. | `string` | — | No |
| `closable` | whether closable or not. | `boolean` | `true` | No |
| `center` | whether to center the text. | `boolean` | `false` | No |
| `close-text` | customized close button text. | `string` | — | No |
| `show-icon` | whether a type icon is displayed. | `boolean` | `false` | No |
| `effect` | theme style. | `'light' \| 'dark'` | `'light'` | No |
### Alert Events
| Name | Description | Type |
| ------- | ----------------------------- | --------------------------- |
| `close` | trigger when alert is closed. | `(evt: MouseEvent) => void` |
### Alert Slots
| Name | Description |
| --------- | --------------------------------- |
| `default` | content of the alert description. |
| `title` | content of the alert title. |