Vue multiplex handwriting wheel – cast map components

Encapsulate the multicast diagram components according to requirements

Requirements are tentatively determined as: width and height, background color, automatic rotation, rotation time interval

Encapsulated components:

<template>
  <div class="xtx-carousel" @mouseenter="enter" @mouseleave="leave">
    <ul class="carousel-body">
      <li
        class="carousel-item"
        :class="{ fade: curIdx === idx }"
        v-for="(item, idx) in sliders"
        :key="item.id"
      >
        <RouterLink to="/">
          <img :src="item.imgUrl" alt="" />
        </RouterLink>
      </li>
    </ul>
    <a href="javascript:;" @click="toggle(-1)" class="carousel-btn prev"
      ><i class="iconfont icon-angle-left"></i
    ></a>
    <a href="javascript:;" class="carousel-btn next" @click="toggle(1)"
      ><i class="iconfont icon-angle-right"></i
    ></a>
    <div class="carousel-indicator">
      <span
        v-for="(i, idx) in 5"
        :key="i"
        @click="curIdx = idx"
        :class="{ active: idx === curIdx }"
      ></span>
    </div>
  </div>
</template>

<script>
import { onUnmounted, ref, watch } from 'vue'
export default {
  props: {
    sliders: {
      type: Array.default: () = >[]},autoplay: {
      type: Boolean.default: false
    },
    duration: {
      type: Number.default: 2000}},name: 'XtxCarousel',
  setup (props) {
    const curIdx = ref(0)

    // Auto play
    let timer = null
    const autoplay = () = > {
      timer = setInterval(() = > {
        curIdx.value++
        if (curIdx.value >= props.sliders.length) curIdx.value = 0
      }, props.duration)
    }
    // If there is data in sliders, it plays automatically
    watch(() = > props.sliders, (newVal, oldVal) = > {
      if (newVal.length > 0) {
        if (props.autoplay) {
          autoplay()
        }
      }
    }, { immediate: true })

    onUnmounted(() = > {
      clearInterval(timer)
    })

    const leave = () = > {
      if (props.autoplay) autoplay()
    }
    const enter = () = > {
      clearInterval(timer)
    }
    // Toggle the previous and the next
    const toggle = step= > {
      curIdx.value += step
      if (curIdx.value >= props.sliders.length) curIdx.value = 0
      if (curIdx.value < 0) curIdx.value = props.sliders.length - 1
    }
    return { curIdx, leave, enter, toggle }
  }
}
</script>
<style scoped lang="less">
.xtx-carousel {
  width: 100%;
  height: 100%;
  min-width: 300px;
  min-height: 150px;
  position: relative;
  .carousel {
    &-body {
      width: 100%;
      height: 100%;
    }
    &-item {
      width: 100%;
      height: 100%;
      position: absolute;
      left: 0;
      top: 0;
      opacity: 0;
      transition: opacity 0.5 s linear;
      &.fade {
        opacity: 1;
        z-index: 1;
      }
      img {
        width: 100%;
        height: 100%;
      }
    }
    &-indicator {
      position: absolute;
      left: 0;
      bottom: 20px;
      z-index: 2;
      width: 100%;
      text-align: center;
      span {
        display: inline-block;
        width: 12px;
        height: 12px;
        background: rgba(0.0.0.0.2);
        border-radius: 50%;
        cursor: pointer;
        ~ span {
          margin-left: 12px;
        }
        &.active {
          background: #fff;
        }
      }
    }
    &-btn {
      width: 44px;
      height: 44px;
      background: rgba(0.0.0.0.2);
      color: #fff;
      border-radius: 50%;
      position: absolute;
      top: 228px;
      z-index: 2;
      text-align: center;
      line-height: 44px;
      opacity: 0;
      transition: all 0.5 s;
      &.prev {
        left: 20px;
      }
      &.next {
        right: 20px; &}}}:hover {
    .carousel-btn {
      opacity: 1; }}}</style>

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Here is a brief explanation of it:

Sliders are a list of data passed in from the upper level component in the form of an array

Autoplay is a Boolean value passed from a parent component, meaning whether auto rotation is enabled

Duration Interval passed from the parent component, meaning how often to cast, type number

props: {
    sliders: {
      type: Array.default: () = >[]},autoplay: {
      type: Boolean.default: false
    },
    duration: {
      type: Number.default: 2000}},Copy the code

Then pass the component definition to use, either globally or locally, and define it globally here

In the js file that defines the global component:

// Introduce the wheel map component
import XtxCarousel from './xtx-carousel.vue'

const myPlugin = {
  install (app) {
    // app is an instance of vue
    // app.component.component.component.component.component.component.object
    app.component(XtxCarousel.name, XtxCarousel)
  }
}

export default myPlugin
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Just import and use() in main.js

// Import global components
import myPlugin from '@/components/index'

createApp(App).use(store).use(router).use(myPlugin).mount('#app')
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Vue2 and VUe3 introduce global component differences