#  InfiniteLoading 滚动加载

### 介绍

列表滚动到底部自动加载更多数据。

### 安装

```javascript
  import { createApp } from 'vue';
  import { InfiniteLoading } from '@nutui/nutui';

  const app = createApp();
  app.use(InfiniteLoading);
```

## 代码演示
    
### 基础用法

```html
<ul class="infiniteUl" id="scroll"  style='height: 300px;'>
    <nut-infiniteloading
        containerId = 'scroll'
        :use-window='false'
        :has-more="hasMore"
        @load-more="loadMore"
    >
        <li class="infiniteLi" v-for="(item, index) in defultList" :key="index">{{item}}</li>
    </nut-infiniteloading>
</ul>
```
```javascript
setup() {
    const hasMore = ref(true);
    const data = reactive({
      defultList: []
    });
    const loadMore = done => {  
      setTimeout(() => {
        const curLen = data.defultList.length;
        for (let i = curLen; i < curLen + 10; i++) {
          data.defultList.push(`${i}`);
        }
        if (data.defultList.length > 30) hasMore.value = false;
        done()
      }, 500);
    };
    const init = () => {
      for (let i = 0; i < 10; i++) {
        data.defultList.push(`${i}`);
      }
    }
    onMounted(() => {
      init()
    });
    return { loadMore, hasMore, ...toRefs(data) };
}
```
### 下拉刷新

```html
<ul class="infiniteUl" id="refreshScroll" style='height: 300px;'>
  <nut-infiniteloading
    pull-icon="JD"
    container-id="refreshScroll"
    :use-window="false"
    :is-open-refresh="true"
    :has-more="refreshHasMore"
    @load-more="refreshLoadMore"
    @refresh="refresh"
  >
    <li
      class="infiniteLi"
      v-for="(item, index) in refreshList"
      :key="index"
      >{{ item }}</li
    >
  </nut-infiniteloading>
</ul>
```
```javascript
setup() {
    const refreshHasMore = ref(true);
    const data = reactive({
      refreshList: []
    });
    const refreshLoadMore = done => {
      setTimeout(() => {
        const curLen = data.refreshList.length;
        for (let i = curLen; i < curLen + 10; i++) {
          data.refreshList.push(
            `${i}`
          );
        }
        if (data.refreshList.length > 30) refreshHasMore.value = false;
        done()
      }, 500);
    };

    const refresh = (done) => {
      setTimeout(()=>{
        Toast.success('刷新成功');
        done()
      },1000)
    }
    const init = () => {
      for (let i = 0; i < 10; i++) {
        data.refreshList.push(`${i}`);
      }
    }
    onMounted(() => {
      init()
    });
    return { refreshLoadMore, refreshHasMore, refresh, ...toRefs(data) };
}
```
### 自定义加载文案

```html
<ul class="infiniteUl" id="customScroll" style='height: 300px;'>
    <nut-infiniteloading
        container-id = 'customScroll'
        :use-window='false'
        :has-more="customHasMore"
        @load-more="customLoadMore"
    >
        <li class="infiniteLi" v-for="(item, index) in customList" :key="index">{{item}}</li>
        <template v-slot:loading>
            <div class="loading">
                <span>加载中...</span>
            </div>
        </template>
        <template v-slot:unloadMore>
            <div class="unload-more">没有数据啦 ~~</div>
        </template>
    </nut-infiniteloading>
</ul>
```
```javascript
setup() {
    const customHasMore = ref(true);
    const data = reactive({
      customList: ['']
    });
    const customLoadMore = done => {
      setTimeout(() => {
        const curLen = data.customList.length;
        for (let i = curLen; i < curLen + 10; i++) {
          data.customList.push(`${i}`);
        }
        if (data.customList.length > 30) customHasMore.value = false;
        done()
      }, 500);
    };
    const init = () => {
      for (let i = 0; i < 10; i++) {
        data.customList.push(`${i}`);
      }
    }
    onMounted(() => {
      init()
    });
    return { customHasMore, customLoadMore,...toRefs(data) };
}
```

## API

### Props

| 参数         | 说明                             | 类型   | 默认值           |
|--------------|----------------------------------|--------|------------------|
| has-more         | 是否还有更多数据               | Boolean | `true`                |
| threshold         | 距离底部多远加载 | Number | `200`               |
| use-window | 将滚动侦听器添加到 window 否则侦听组件的父节点     | Boolean | `true` |
| use-capture          | 是否使用捕获模式 true 捕获 false 冒泡                        | Boolean | `false`            |
| container-id          | 在 useWindow 属性为 false 的时候，自定义设置节点ID                        | String | `''`            |
| load-more-txt          | “没有更多数”据展示文案                        | String | `'哎呀，这里是底部了啦'`            |
| is-open-refresh        | 是否开启下拉刷新                         | Boolean | `false`                |
| pull-icon        | 下拉刷新[图标名称](#/icon)                        | String | <img src="https://img10.360buyimg.com/imagetools/jfs/t1/169863/6/4565/6306/60125948E7e92774e/40b3a0cf42852bcb.png" width=40/>                |
| pull-txt        | 下拉刷新提示文案                         | String | `松手刷新`                |
| load-icon        | 上拉加载[图标名称](#/icon)                       | Boolean | <img src="https://img10.360buyimg.com/imagetools/jfs/t1/169863/6/4565/6306/60125948E7e92774e/40b3a0cf42852bcb.png" width=40 />                |
| load-txt        | 上拉加载提示文案                         | String | `加载中...`                |

### Events

| 事件名 | 说明           | 回调参数     |
|--------|----------------|--------------|
| load-more  | 继续加载的回调函数 | done 函数，用于关闭加载中状态 |
| scroll-change  | 实时监听滚动高度 | 滚动高度 |
| refresh  | 下拉刷新事件回调 | done 函数，用于关闭加载中状态 |
    