2020-08-13 15:18:26 +08:00
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## Backtop 回到顶部
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返回页面顶部的操作按钮
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### 基础用法
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滑动页面即可看到右下方的按钮。
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:::demo
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```html
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<template>
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Scroll down to see the bottom-right button.
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<el-backtop target=".page-component__scroll .el-scrollbar__wrap"></el-backtop>
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</template>
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```
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:::
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### 自定义显示内容
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显示区域被固定为 40px \* 40px 的区域, 其中的内容可支持自定义。
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:::demo
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```html
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<template>
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Scroll down to see the bottom-right button.
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2021-09-04 19:29:28 +08:00
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<el-backtop
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target=".page-component__scroll .el-scrollbar__wrap"
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:bottom="100"
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>
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2020-08-13 15:18:26 +08:00
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<div
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style="{
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height: 100%;
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width: 100%;
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background-color: #f2f5f6;
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box-shadow: 0 0 6px rgba(0,0,0, .12);
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text-align: center;
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line-height: 40px;
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color: #1989fa;
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}"
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>
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UP
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</div>
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</el-backtop>
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</template>
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```
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:::
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### Attributes
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2021-09-04 19:29:28 +08:00
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| 参数 | 说明 | 类型 | 可选值 | 默认值 |
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| ----------------- | -------------------------------- | ------ | ------ | ------ |
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| target | 触发滚动的对象 | string | | |
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2020-08-13 15:18:26 +08:00
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| visibility-height | 滚动高度达到此参数值才出现 | number | | 200 |
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| right | 控制其显示位置, 距离页面右边距 | number | | 40 |
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| bottom | 控制其显示位置, 距离页面底部距离 | number | | 40 |
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### Events
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| 事件名 | 说明 | 回调参数 |
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| ------ | ------------------ | -------- |
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| click | 点击按钮触发的事件 | 点击事件 |
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