（十八）硅谷外卖-开发Star组件

一、图片

二、components/Star/Star.vue

<template>
  <div class="star" :class="`star-${size}`">
    <span class="star-item" :class="starClass" v-for="(starClass) in starClasses"></span>
  </div>
</template>

<script>
  const CLASS_ON = 'on'
  const CLASS_HALF = 'half'
  const CLASS_OFF = 'off'

  export default {
    name: 'Star',
    props: {
        score: Number,
      size: Number
    },
    computed: {
        starClasses () {
            const scs = []
        const {score} = this
        const scoreInteger = Math.floor(score)
        // 添加类名 CLASS_ON
        for (let i = 0; i < scoreInteger; i++) {
            scs.push(CLASS_ON)
        }

        // 添加类名 CLASS_HALF
        if (score * 10 - scoreInteger * 10 > 5) {
            scs.push(CLASS_HALF)
        }
        // 添加类名 CLASS_OFF
        while (scs.length < 5) {
            scs.push(CLASS_OFF)
        }

        return scs
      }
    }
  }
</script>

<style lang="stylus" rel="stylesheet/stylus">
  @import "../../common/stylus/mixins.styl"
  .star //2x图 3x图
    float left
    font-size 0
    .star-item
      display inline-block
      background-repeat no-repeat
    &.star-48
      .star-item
        width 20px
        height 20px
        margin-right 22px
        background-size 20px 20px
        &:last-child
          margin-right: 0
        &.on
          bg-image('./images/stars/star48_on')
        &.half
          bg-image('./images/stars/star48_half')
        &.off
          bg-image('./images/stars/star48_off')
    &.star-36
      .star-item
        width 15px
        height 15px
        margin-right 6px
        background-size 15px 15px
        &:last-child
          margin-right 0
        &.on
          bg-image('./images/stars/star36_on')
        &.half
          bg-image('./images/stars/star36_half')
        &.off
          bg-image('./images/stars/star36_off')
    &.star-24
      .star-item
        width 10px
        height 10px
        margin-right 3px
        background-size 10px 10px
        &:last-child
          margin-right 0
        &.on
          bg-image('./images/stars/star24_on')
        &.half
          bg-image('./images/stars/star24_half')
        &.off
          bg-image('./images/stars/star24_off')
</style>

三、ShopList.vue

<Star :size="24" :score="shop.rating"/>

<script>
  import Star from '../Star/Star'

  export default {
    name: 'ShopList',
    components: {
        Star
    }
  }
</script>

标签：bg,Star,stars,image,外卖,images,硅谷,CLASS,&.
来源： https://www.cnblogs.com/mxsf/p/10991354.html