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HuajisheTools/HuajisheCheckChaoXing/miniprogram_npm/tdesign-miniprogram/overlay/README.md
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---
title: Overlay 遮罩层
description: 通过遮罩层,可以强调部分内容
spline: message
isComponent: true
---
<span class="coverages-badge" style="margin-right: 10px"><img src="https://img.shields.io/badge/coverages%3A%20lines-100%25-blue" /></span><span class="coverages-badge" style="margin-right: 10px"><img src="https://img.shields.io/badge/coverages%3A%20functions-100%25-blue" /></span><span class="coverages-badge" style="margin-right: 10px"><img src="https://img.shields.io/badge/coverages%3A%20statements-100%25-blue" /></span><span class="coverages-badge" style="margin-right: 10px"><img src="https://img.shields.io/badge/coverages%3A%20branches-100%25-blue" /></span>
<div style="background: #ecf2fe; display: flex; align-items: center; line-height: 20px; padding: 14px 24px; border-radius: 3px; color: #555a65">
<svg fill="none" viewBox="0 0 16 16" width="16px" height="16px" style="margin-right: 5px">
<path fill="#0052d9" d="M8 15A7 7 0 108 1a7 7 0 000 14zM7.4 4h1.2v1.2H7.4V4zm.1 2.5h1V12h-1V6.5z" fillOpacity="0.9"></path>
</svg>
该组件于 0.10.0 版本上线,请留意版本。
</div>
## 引入
全局引入,在 miniprogram 根目录下的`app.json`中配置,局部引入,在需要引入的页面或组件的`index.json`中配置。
```json
"usingComponents": {
"t-overlay": "tdesign-miniprogram/overlay/overlay"
}
```
## 代码演示
<a href="https://developers.weixin.qq.com/s/nS8fQimZ7cSG" title="在开发者工具中预览效果" target="_blank" rel="noopener noreferrer"> 在开发者工具中预览效果 </a>
<blockquote style="background-color: #d9e1ff; font-size: 15px; line-height: 26px;margin: 16px 0 0;padding: 16px; border-radius: 6px; color: #0052d9" >
<p>Tips: 请确保开发者工具为打开状态。导入开发者工具后依次执行npm i > 构建npm包 > 勾选 "将JS编译成ES5"</p>
</blockquote>
### 基础使用
{{ base }}
## API
### Overlay Props
名称 | 类型 | 默认值 | 描述 | 必传
-- | -- | -- | -- | --
style | Object | - | 样式 | N
custom-style | Object | - | 样式,一般用于开启虚拟化组件节点场景 | N
background-color | String | - | 遮罩层的背景色 | N
duration | Number | 300 | 背景色过渡时间,单位毫秒 | N
prevent-scroll-through | Boolean | true | 防止滚动穿透,即不允许点击和滚动 | N
using-custom-navbar | Boolean | false | 是否使用了自定义导航栏 | N
visible | Boolean | false | 是否展示 | N
z-index | Number | 11000 | 遮罩层级 | N
### Overlay Events
名称 | 参数 | 描述
-- | -- | --
click | `({ visible: boolean })` | 点击遮罩时触发
### CSS Variables
组件提供了下列 CSS 变量,可用于自定义样式。
名称 | 默认值 | 描述
-- | -- | --
--td-overlay-bg-color | @font-gray-2 | -
--td-overlay-transition-duration | 300ms | -