vant/src/overlay/README.md
2021-04-08 09:57:55 +08:00

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# Overlay
### Intro
Create a mask layer to emphasize specific page elements and prevent users from performing other operations.
### Install
Register component globally via `app.use`, refer to [Component Registration](#/en-US/advanced-usage#zu-jian-zhu-ce) for more registration ways。
```js
import { createApp } from 'vue';
import { Overlay } from 'vant';
const app = createApp();
app.use(Overlay);
```
## Usage
### Basic Usage
```html
<van-button type="primary" text="Show Overlay" @click="show = true" />
<van-overlay :show="show" @click="show = false" />
```
```js
import { ref } from 'vue';
export default {
setup() {
const show = ref(false);
return { show };
},
};
```
### Embedded Content
```html
<van-overlay :show="show" @click="show = false">
<div class="wrapper" @click.stop>
<div class="block" />
</div>
</van-overlay>
<style>
.wrapper {
display: flex;
align-items: center;
justify-content: center;
height: 100%;
}
.block {
width: 120px;
height: 120px;
background-color: #fff;
}
</style>
```
## API
### Props
| Attribute | Description | Type | Default |
| --- | --- | --- | --- |
| show | Whether to show overlay | _boolean_ | `false` |
| z-index | z-index | _number \| string_ | `1` |
| duration | Animation duration | _number \| string_ | `0.3` |
| class-name | ClassName | _string_ | - |
| custom-class | Custom style | _object_ | - |
| lock-scroll | Whether to lock background scroll | _boolean_ | `true` |
### Events
| Event | Description | Arguments |
| ----- | --------------------------------- | ------------------- |
| click | Emitted when component is clicked | _event: MouseEvent_ |
### Slots
| Name | Description |
| ------- | ------------ |
| default | Default slot |
### Less Variables
How to use: [Custom Theme](#/en-US/theme).
| Name | Default Value | Description |
| ------------------------- | -------------------- | ----------- |
| @overlay-z-index | `1` | - |
| @overlay-background-color | `rgba(0, 0, 0, 0.7)` | - |