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247 lines
5.1 KiB
Markdown
247 lines
5.1 KiB
Markdown
## 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 4 types of themes defined by `type`, whose default value is `info`.
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```html
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<template>
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<el-alert
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title="success alert"
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type="success">
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</el-alert>
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<el-alert
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title="info alert"
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type="info">
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</el-alert>
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<el-alert
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title="warning alert"
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type="warning">
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</el-alert>
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<el-alert
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title="error alert"
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type="error">
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</el-alert>
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</template>
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```
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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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```html
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<template>
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<el-alert
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title="success alert"
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type="success"
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effect="dark">
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</el-alert>
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<el-alert
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title="info alert"
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type="info"
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effect="dark">
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</el-alert>
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<el-alert
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title="warning alert"
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type="warning"
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effect="dark">
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</el-alert>
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<el-alert
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title="error alert"
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type="error"
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effect="dark">
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</el-alert>
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</template>
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```
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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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```html
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<template>
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<el-alert
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title="unclosable alert"
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type="success"
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:closable="false">
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</el-alert>
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<el-alert
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title="customized close-text"
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type="info"
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close-text="Gotcha">
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</el-alert>
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<el-alert
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title="alert with callback"
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type="warning"
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@close="hello">
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</el-alert>
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</template>
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<script>
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import { defineComponent } from 'vue'
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export default defineComponent({
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setup() {
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const hello = () => {
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alert('Hello World!');
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}
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return {
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hello
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}
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}
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})
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</script>
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```
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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.
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```html
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<template>
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<el-alert
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title="success alert"
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type="success"
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show-icon>
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</el-alert>
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<el-alert
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title="info alert"
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type="info"
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show-icon>
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</el-alert>
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<el-alert
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title="warning alert"
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type="warning"
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show-icon>
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</el-alert>
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<el-alert
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title="error alert"
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type="error"
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show-icon>
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</el-alert>
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</template>
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```
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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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```html
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<template>
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<el-alert
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title="success alert"
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type="success"
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center
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show-icon>
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</el-alert>
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<el-alert
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title="info alert"
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type="info"
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center
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show-icon>
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</el-alert>
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<el-alert
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title="warning alert"
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type="warning"
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center
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show-icon>
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</el-alert>
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<el-alert
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title="error alert"
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type="error"
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center
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show-icon>
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</el-alert>
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</template>
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```
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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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```html
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<template>
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<el-alert
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title="with description"
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type="success"
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description="This is a description.">
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</el-alert>
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</template>
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```
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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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```html
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<template>
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<el-alert
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title="success alert"
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type="success"
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description="more text description"
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show-icon>
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</el-alert>
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<el-alert
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title="info alert"
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type="info"
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description="more text description"
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show-icon>
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</el-alert>
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<el-alert
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title="warning alert"
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type="warning"
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description="more text description"
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show-icon>
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</el-alert>
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<el-alert
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title="error alert"
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type="error"
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description="more text description"
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show-icon>
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</el-alert>
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</template>
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```
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:::
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### Attributes
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| Attribute | Description | Type | Accepted Values | Default |
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|---------- |-------------- |---------- |-------------------------------- |-------- |
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| title | title | string | — | — |
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| type | Component type | string | success/warning/info/error | info |
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| description | Descriptive text. Can also be passed with the default slot | string | — | — |
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| closable | If closable or not | boolean | — | true |
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| center | Whether to center the text | boolean | — | false |
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| close-text | Customized close button text | string | — | — |
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| show-icon | If a type icon is displayed | boolean | — | false |
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| effect | Choose theme | string | light/dark | light |
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### Slots
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| Name | Description |
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|------|--------|
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| — | description |
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| title | content of the Alert title |
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### Events
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| Event Name | Description | Parameters |
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|---------- |-------- |---------- |
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| close | fires when alert is closed | — |
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