mirror of https://github.com/ElemeFE/element
Backtop: Add backtop component (#15541)
parent
9ea7012cfd
commit
45383cd655
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@ -74,5 +74,6 @@
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"divider": "./packages/divider/index.js",
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"image": "./packages/image/index.js",
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"calendar": "./packages/calendar/index.js",
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"backtop": "./packages/backtop/index.js",
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"infiniteScroll": "./packages/infiniteScroll/index.js"
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}
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@ -0,0 +1,60 @@
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## Backtop
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A button to back to top
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### Basic usage
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Scroll down to see the bottom-right button.
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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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### Customizations
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Display area is 40px \* 40px.
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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" :bottom="100">
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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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| Attribute | Description | Type | Accepted Values | Default |
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| ----------------- | ------------------------------------------------------------------- | --------------- | --------------- | ------- |
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| target | the target to trigger scroll | string | | |
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| visibility-height | the button will not show until the scroll height reaches this value | number | | 200 |
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| right | right distance | number | | 40 |
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| bottom | bottom distance | number | | 40 |
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### Events
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| Event Name | Description | Parameters |
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| ---------- | ------------------- | ----------- |
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| click | triggers when click | click event |
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@ -0,0 +1,60 @@
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## Backtop
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A button to back to top
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### Basic usage
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Scroll down to see the bottom-right button.
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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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### Customizations
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Display area is 40px \* 40px.
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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" :bottom="100">
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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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| Attribute | Description | Type | Accepted Values | Default |
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| ----------------- | ------------------------------------------------------------------- | --------------- | --------------- | ------- |
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| target | the target to trigger scroll | string | | |
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| visibility-height | the button will not show until the scroll height reaches this value | number | | 200 |
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| right | right distance | number | | 40 |
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| bottom | bottom distance | number | | 40 |
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### Events
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| Event Name | Description | Parameters |
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| ---------- | ------------------- | ----------- |
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| click | triggers when click | click event |
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@ -0,0 +1,60 @@
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## Backtop
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A button to back to top
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### Basic usage
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Scroll down to see the bottom-right button.
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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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### Customizations
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Display area is 40px \* 40px.
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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" :bottom="100">
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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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| Attribute | Description | Type | Accepted Values | Default |
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| ----------------- | ------------------------------------------------------------------- | --------------- | --------------- | ------- |
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| target | the target to trigger scroll | string | | |
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| visibility-height | the button will not show until the scroll height reaches this value | number | | 200 |
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| right | right distance | number | | 40 |
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| bottom | bottom distance | number | | 40 |
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### Events
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| Event Name | Description | Parameters |
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| ---------- | ------------------- | ----------- |
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| click | triggers when click | click event |
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@ -0,0 +1,60 @@
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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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<el-backtop target=".page-component__scroll .el-scrollbar__wrap" :bottom="100">
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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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| 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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| 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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@ -268,6 +268,10 @@
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"path": "/image",
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"title": "Image 图片"
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},
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{
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"path": "/backtop",
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"title": "Backtop 回到顶部"
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},
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{
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"path": "/infiniteScroll",
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"title": "InfiniteScroll 无限滚动"
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"path": "/image",
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"title": "Image"
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},
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{
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"path": "/backtop",
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"title": "Backtop"
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},
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{
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"path": "/infiniteScroll",
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"title": "InfiniteScroll"
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"path": "/image",
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"title": "Image"
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},
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{
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"path": "/backtop",
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"title": "Backtop"
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},
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{
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"path": "/infiniteScroll",
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"title": "InfiniteScroll"
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"path": "/image",
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"title": "Image"
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},
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{
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"path": "/backtop",
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"title": "Backtop"
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},
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{
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"path": "/infiniteScroll",
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"title": "InfiniteScroll"
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}
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}
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}
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.page-component-up {
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background-color: #fff;
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position: fixed;
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right: 100px;
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bottom: 150px;
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width: 40px;
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height: 40px;
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size: 40px;
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border-radius: 20px;
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cursor: pointer;
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transition: .3s;
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box-shadow: 0 0 6px rgba(0,0,0, .12);
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z-index: 5;
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i {
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color: #409EFF;
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display: block;
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line-height: 40px;
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text-align: center;
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font-size: 18px;
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}
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&.hover {
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opacity: 1;
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}
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}
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.back-top-fade-enter,
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.back-top-fade-leave-active {
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transform: translateY(-30px);
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opacity: 0;
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}
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}
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@media (max-width: 768px) {
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overflow: auto;
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display: block;
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}
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.page-component-up {
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display: none;
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}
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}
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}
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</style>
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<router-view class="content"></router-view>
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<footer-nav></footer-nav>
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</div>
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<transition name="back-top-fade">
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<div
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class="page-component-up"
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:class="{ 'hover': hover }"
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v-show="showBackToTop"
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@mouseenter="hover = true"
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@mouseleave="hover = false"
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@click="toTop">
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<i class="el-icon-caret-top"></i>
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</div>
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</transition>
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<el-backtop
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v-if="showBackToTop"
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target=".page-component__scroll .el-scrollbar__wrap"
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right="100"
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bottom="150"
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></el-backtop>
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</div>
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</el-scrollbar>
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</template>
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return {
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lang: this.$route.meta.lang,
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navsData,
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hover: false,
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showBackToTop: false,
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scrollTop: 0,
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showHeader: true,
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componentScrollBar: null,
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}, 50);
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}
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},
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toTop() {
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this.hover = false;
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this.showBackToTop = false;
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this.componentScrollBox.scrollTop = 0;
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},
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handleScroll() {
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const scrollTop = this.componentScrollBox.scrollTop;
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this.showBackToTop = scrollTop >= 0.5 * document.body.clientHeight;
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if (this.showHeader !== this.scrollTop > scrollTop) {
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this.showHeader = this.scrollTop > scrollTop;
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}
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this.scrollTop = scrollTop;
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}
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},
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computed: {
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showBackToTop() {
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return !this.$route.path.match(/backtop/);
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}
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},
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created() {
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bus.$on('navFade', val => {
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this.navFaded = val;
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import Backtop from './src/main';
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/* istanbul ignore next */
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Backtop.install = function(Vue) {
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Vue.component(Backtop.name, Backtop);
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};
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export default Backtop;
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<template>
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<transition name="el-fade-in">
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<div
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v-if="visible"
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@click.stop="handleClick"
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:style="{
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'right': styleRight,
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'bottom': styleBottom
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}"
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class="el-backtop">
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<slot>
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<el-icon name="caret-top"></el-icon>
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</slot>
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</div>
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</transition>
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</template>
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<script>
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import throttle from 'throttle-debounce/throttle';
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export default {
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name: 'ElBacktop',
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props: {
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visibilityHeight: {
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type: Number,
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default: 200
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},
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target: [String],
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right: {
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type: Number,
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default: 40
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},
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bottom: {
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type: Number,
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default: 40
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}
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},
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data() {
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return {
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el: null,
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container: null,
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visible: false
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};
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},
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computed: {
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styleBottom() {
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return `${this.bottom}px`;
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},
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styleRight() {
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return `${this.right}px`;
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}
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},
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mounted() {
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this.init();
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this.throttledScrollHandler = throttle(300, this.onScroll);
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this.container.addEventListener('scroll', this.throttledScrollHandler);
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},
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methods: {
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init() {
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this.container = document;
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this.el = document.documentElement;
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if (this.target) {
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this.el = document.querySelector(this.target);
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if (!this.el) {
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throw new Error(`target is not existed: ${this.target}`);
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}
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this.container = this.el;
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}
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},
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onScroll() {
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const scrollTop = this.el.scrollTop;
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this.visible = scrollTop >= this.visibilityHeight;
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},
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handleClick(e) {
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this.scrollToTop();
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this.$emit('click', e);
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},
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scrollToTop() {
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let el = this.el;
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let step = 0;
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let interval = setInterval(() => {
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if (el.scrollTop <= 0) {
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clearInterval(interval);
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return;
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}
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step += 10;
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el.scrollTop -= step;
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}, 20);
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}
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},
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beforeDestroy() {
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this.container.removeEventListener('scroll', this.throttledScrollHandler);
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}
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};
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</script>
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@import "mixins/mixins";
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@import "common/var";
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@include b(backtop) {
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position: fixed;
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background-color: $--backtop-background-color;
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width: 40px;
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height: 40px;
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border-radius: 50%;
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color: $--backtop-font-color;
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display: flex;
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align-items: center;
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justify-content: center;
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font-size: 20px;
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box-shadow: 0 0 6px rgba(0,0,0, .12);
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cursor: pointer;
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z-index: 5;
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&:hover {
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background-color: $--backtop-hover-background-color
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}
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}
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@ -905,6 +905,15 @@ $--timeline-node-size-normal: 12px !default;
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$--timeline-node-size-large: 14px !default;
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$--timeline-node-color: $--border-color-light !default;
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/* Backtop
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--------------------------*/
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/// color||Color|0
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$--backtop-background-color: $--color-white !default;
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/// color||Color|0
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$--backtop-font-color: $--color-primary !default;
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/// color||Color|0
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$--backtop-hover-background-color: $--border-color-extra-light !default;
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/* Link
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--------------------------*/
|
||||
/// fontSize||Font|1
|
||||
|
|
|
@ -71,3 +71,4 @@
|
|||
@import "./divider.scss";
|
||||
@import "./image.scss";
|
||||
@import "./calendar.scss";
|
||||
@import "./backtop.scss";
|
||||
|
|
|
@ -75,6 +75,7 @@ import Link from '../packages/link/index.js';
|
|||
import Divider from '../packages/divider/index.js';
|
||||
import Image from '../packages/image/index.js';
|
||||
import Calendar from '../packages/calendar/index.js';
|
||||
import Backtop from '../packages/backtop/index.js';
|
||||
import InfiniteScroll from '../packages/infiniteScroll/index.js';
|
||||
import locale from 'element-ui/src/locale';
|
||||
import CollapseTransition from 'element-ui/src/transitions/collapse-transition';
|
||||
|
@ -151,6 +152,7 @@ const components = [
|
|||
Divider,
|
||||
Image,
|
||||
Calendar,
|
||||
Backtop,
|
||||
CollapseTransition
|
||||
];
|
||||
|
||||
|
@ -266,5 +268,6 @@ export default {
|
|||
Divider,
|
||||
Image,
|
||||
Calendar,
|
||||
Backtop,
|
||||
InfiniteScroll
|
||||
};
|
||||
|
|
|
@ -0,0 +1,28 @@
|
|||
import { createVue, destroyVM, wait } from '../util';
|
||||
|
||||
describe('Backtop', () => {
|
||||
let vm;
|
||||
afterEach(() => {
|
||||
destroyVM(vm);
|
||||
});
|
||||
|
||||
it('create', async() => {
|
||||
vm = createVue({
|
||||
template: `
|
||||
<div ref="scrollTarget" class="test-scroll" style="height: 100px; overflow: auto">
|
||||
<div style="height: 10000px; width: 100%">
|
||||
<el-backtop target=".test-scroll">
|
||||
<span>test_up_text</span>
|
||||
</el-backtop>
|
||||
</div>
|
||||
</div>
|
||||
`
|
||||
}, true);
|
||||
expect(vm.$el).to.exist;
|
||||
expect(vm.$el.innerText).to.be.equal('');
|
||||
vm.$refs.scrollTarget.scrollTop = 2000;
|
||||
await wait();
|
||||
expect(vm.$el.innerText).to.be.equal('test_up_text');
|
||||
});
|
||||
});
|
||||
|
|
@ -0,0 +1,16 @@
|
|||
import { ElementUIComponent } from './component'
|
||||
|
||||
/** Backtop Component */
|
||||
export declare class ElBacktop extends ElementUIComponent {
|
||||
/** Backtop target */
|
||||
target: string
|
||||
|
||||
/** Backtop visibility height */
|
||||
visibilityHeight: string | number
|
||||
|
||||
/** Backtop right position */
|
||||
right: string | number
|
||||
|
||||
/** Backtop bottom position */
|
||||
bottom: string | number
|
||||
}
|
|
@ -74,6 +74,7 @@ import { ElDivider } from './divider'
|
|||
import { ElIcon } from './icon'
|
||||
import { ElCalendar } from './calendar'
|
||||
import { ElImage } from './image'
|
||||
import { ElBacktop } from './backtop'
|
||||
import { ElInfiniteScroll } from './infiniteScroll'
|
||||
|
||||
export interface InstallationOptions {
|
||||
|
@ -322,5 +323,9 @@ export class Icon extends ElIcon {}
|
|||
/** Calendar Component */
|
||||
export class Calendar extends ElCalendar {}
|
||||
|
||||
/** Backtop Component */
|
||||
export class Backtop extends ElBacktop {}
|
||||
|
||||
/** InfiniteScroll Component */
|
||||
export class InfiniteScroll extends ElInfiniteScroll {}
|
||||
|
||||
|
|
Loading…
Reference in New Issue