68 lines
1.8 KiB
Markdown
68 lines
1.8 KiB
Markdown
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---
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title: BackTop 返回顶部
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description: 用于当页面过长往下滑动时，帮助用户快速回到页面顶部。
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spline: navigation
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isComponent: true
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---
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## 引入
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可在 `main.ts` 或在需要使用的页面或组件中引入。
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```js
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import TBackTop from '@tdesign/uniapp/back-top/back-top.vue';
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```
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### 基础返回顶部
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{{ base }}
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## API
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### BackTop Props
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名称 | 类型 | 默认值 | 描述 | 必传
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-- | -- | -- | -- | --
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custom-style | Object | - | 自定义样式 | N
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fixed | Boolean | true | 是否绝对定位固定到屏幕右下方 | N
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icon | String / Boolean / Object | true | 图标。值为 `false` 表示不显示图标。不传表示使用默认图标 `'backtop'` | N
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scroll-top | Number | 0 | 页面滚动距离 | N
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text | String | '' | 文案 | N
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theme | String | round | 预设的样式类型。可选项：round/half-round/round-dark/half-round-dark | N
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visibility-height | Number | 200 | 滚动高度达到此参数值才出现 | N
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### BackTop Events
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名称 | 参数 | 描述
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-- | -- | --
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to-top | \- | 点击触发
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### BackTop Slots
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名称 | 描述
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-- | --
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\- | 默认插槽，自定义内容区域内容
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icon | 自定义图标内容
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### BackTop External Classes
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类名 | 描述
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-- | --
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t-class | 根节点样式类
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t-class-icon | 图标样式类
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t-class-text | 文本样式类
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### CSS Variables
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组件提供了下列 CSS 变量，可用于自定义样式。
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名称 | 默认值 | 描述
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-- | -- | --
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--td-back-top-half-round-border-radius | @radius-round | -
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--td-back-top-round-bg-color | @bg-color-container | -
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--td-back-top-round-border-color | @component-border | -
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--td-back-top-round-border-radius | @radius-circle | -
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--td-back-top-round-color | @text-color-primary | -
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--td-back-top-round-dark-bg-color | @gray-color-13 | -
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--td-back-top-round-dark-color | @text-color-anti | -
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