父元件傳值給子元件 -- 以封裝公用slide元件為例

父元件

<template>
  <section class="banner">
    <slide :imgList="imgList" :options="swiperOption" width="100%" height="480"></slide>
  </section>
</template>

<script>
import Slide from "@/components/slide";
import img1 from "@/assets/1.jpg";
import img2 from "@/assets/2.jpg";
import img3 from "@/assets/3.jpg";
import img4 from "@/assets/4.jpg";
import img5 from "@/assets/5.jpg";
export default {
  data() {
    return {
      swiperOption: {
        // swipe官方的api所有引數都可以用
      },
      imgList: [img1, img2, img3, img4, img5]
    };
  },
  components: {
    Slide
  }
};
</script>
 

子元件

<template>
  <swiper :options="swiperOption">
    <swiper-slide v-for="(item, index) in imgList" :key="index">
      <img :src="item" :width="width" :height="height" alt>
    </swiper-slide>
    <!-- Optional controls -->
    <div class="swiper-pagination" slot="pagination"></div>
    <div class="swiper-button-prev" slot="button-prev"></div>
    <div class="swiper-button-next" slot="button-next"></div>
  </swiper>
</template>

<script>
import "swiper/dist/css/swiper.css";
import { swiper, swiperSlide } from "vue-awesome-swiper";

export default {
  components: {
    swiper,
    swiperSlide
  },
  props: ["imgList", "options", "width", "height"],
  data() {
    return {
      swiperOption: {
        // 所有的引數同 swiper 官方 api 引數
        navigation: {
          nextEl: ".swiper-button-next",
          prevEl: ".swiper-button-prev"
        },
        // 分組模式
        // slidesPerView: 3,
        // spaceBetween: 30,
        // 是否迴圈
        loop: true,
        pagination: {
          el: ".swiper-pagination",
          clickable: true
        }
      }
    };
  },
  computed: {},
  created() {
    // 合併使用者設定的引數
    this.swiperOption = Object.assign(this.swiperOption, this.options);
  },
  mounted() {
    // current swiper instance
    // 然後你就可以使用當前上下文內的swiper物件去做你想做的事了
    //console.log("this is current swiper instance object", this.swiper);
    // this.swiper.slideTo(3, 1000, false);
  }
};
</script>

<style lang='less'>
</style>
 

子元件傳值給父元件

父元件

<template>
  <main>
    <section class="container thumb">
      <p class="lead">{{ msg }}</p>
      <thumb @listenToChildEvent="foo"></thumb>
    </section>
  </main>
</template>

<script>
import Thumb from "@/components/thumbnail";
export default {
  data() {
    return {
      msg: "子元件將要修改父元件的值"
    };
  },
  components: {
    Thumb
  },
  methods: {
    foo(data) {
      console.log(data);
      this.msg = data;
    }
  }
};
</script>

<style lang="less">
.thumb {
  margin-top: 20px;
}
</style>
 

子元件

<template>
  <div class="row">
    <div class="col-sm-6 col-md-3" v-for="(item, index) in 4" :key="index">
      <div class="thumbnail">
        <img src="@/assets/thumb.svg" alt="...">
        <div class="caption">
          <h3>Thumbnail label</h3>
          <p>Lorem ipsum dolor sit amet consectetur, adipisicing elit. Vero vitae mollitia quos dolores ullam suscipit temporibus sed ex sapiente quisquam impedit nobis, consectetur sit, earum dolor aspernatur perspiciatis distinctio odio?</p>
          <p>
            <a href="javascript:;" @click="handleClick(index)" class="btn btn-primary" role="button">修改父元件的值</a>
          </p>
        </div>
      </div>
    </div>
  </div>
</template>

<script>
export default {
  methods: {
    handleClick(index) {
      console.log(index);
      this.$emit("listenToChildEvent", "我是第"+ (index + 1) +"個修改父元件值的按鈕");
    }
  }
};
</script>

<style>
</style>