[JavaScript知识库]Vue3中封装BetterScroll2.0实现轮播组件

移动端PC端许多业务代码，会要求实现滚动功能
BetterScroll2.0官网
slider.vue

<template>
  <div class="slider" ref="rootRef">
    <div class="slider-group">
      <div
        class="slider-page"
        v-for="item in sliders"
        :key="item.id"
      >
        <a :href="item.link">
          <img :src="item.pic"/>
        </a>
      </div>
    </div>
    <div class="dots-wrapper">
      <span
        class="dot"
        v-for="(item, index) in sliders"
        :key="item.id"
        :class="{'active': currentPageIndex === index}">
      </span>
    </div>
  </div>
</template>

<script>
import { ref } from 'vue'
import useSlider from './use-slider'

export default {
  name: 'slider',
  props: {
    // 父组件传过来的轮播数组数据
    sliders: {
      type: Array,
      default() {
        return []
      }
    }
  },
  setup() {
    const rootRef = ref(null)
    const { currentPageIndex } = useSlider(rootRef)

    return {
      rootRef,
      currentPageIndex
    }
  }
}
</script>

<style lang="scss" scoped>
.slider {
  min-height: 1px;
  font-size: 0;
  touch-action: pan-y;
  .slider-group {
    position: relative;
    overflow: hidden;
    white-space: nowrap;
    .slider-page {
      display: inline-block;
      transform: translate3d(0, 0, 0);
      backface-visibility: hidden;
      a {
        display: block;
        width: 100%;
      }
      img {
        display: block;
        width: 100%;
      }
    }
  }
  .dots-wrapper {
    position: absolute;
    left: 50%;
    bottom: 12px;
    line-height: 12px;
    transform: translateX(-50%);
    .dot {
      display: inline-block;
      margin: 0 4px;
      width: 8px;
      height: 8px;
      border-radius: 50%;
      background: $color-text-l;
      &.active {
        width: 20px;
        border-radius: 5px;
        background: $color-text-ll;
      }
    }
  }
}
</style>

useSlider.js

import BScroll from '@better-scroll/core'
import Slide from '@better-scroll/slide'

import { onMounted, onUnmounted, onActivated, onDeactivated, ref } from 'vue'

BScroll.use(Slide)

export default function useSlider(wrapperRef) {
  const slider = ref(null)
  const currentPageIndex = ref(0)

  onMounted(() => {
    // 创建betterscroll对象
    const sliderVal = slider.value = new BScroll(wrapperRef.value, {
      click: true,
      scrollX: true,
      scrollY: false,
      momentum: false,
      bounce: false,
      probeType: 2,
      slide: true
    })

    // 触发时机：当 slide 切换 page 之后触发
    sliderVal.on('slideWillChange', (page) => {
      currentPageIndex.value = page.pageX
    })
  })

  onUnmounted(() => {
    slider.value.destroy()
  })

  onActivated(() => {
    slider.value.enable()
    slider.value.refresh()
  })

  onDeactivated(() => {
    slider.value.disable()
  })

  return {
    slider,
    currentPageIndex
  }
}

使用：

<div class="slider-wrapper">
  <div class="slider-content">
    <slider v-if="sliders.length" :sliders="sliders"></slider>
  </div>
</div>
导入注册，sliders是轮播数据
import Scroll from '@/components/wrap-scroll'

.slider-wrapper {
  position: relative;
  width: 100%;
  height: 0;
  padding-top: 40%;
  overflow: hidden;
  .slider-content {
    position: absolute;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
  }
}

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