Vue开发仿京东商场app

git clone https://github.com/GitHubGanKai/vue-jd-h5.git 

gankaideMacBook-Pro:vue-jd-h5 gankai$ git branch -a
  demo
  vue-next
  dev
  feature
  gh-pages
* master
  remotes/origin/HEAD -> origin/master
  remotes/origin/demo
  remotes/origin/vue-next
  remotes/origin/dev
  remotes/origin/feature
  remotes/origin/gh-pages
  remotes/origin/master

gankaideMacBook-Pro:~ gankai$ nrm ls

  npm -------- https://registry.npmjs.org/
* yarn ------- https://registry.yarnpkg.com/
  cnpm ------- http://r.cnpmjs.org/
  taobao ----- https://registry.npm.taobao.org/
  nj --------- https://registry.nodejitsu.com/
  npmMirror -- https://skimdb.npmjs.com/registry/
  edunpm ----- http://registry.enpmjs.org/

npm install 

yarn 

<script src="https://unpkg.com/vue@next"></script>

import Vue from 'vue';
import VueCompositionApi from '@vue/composition-api';

Vue.use(VueCompositionApi);

# in an existing Vue CLI project
vue add vue-next

export default {
  onRenderTriggered(e) {
    debugger
    // inspect which dependency is causing the component to re-render
  }
}

import { provide, inject } from '@vue/composition-api'

const ThemeSymbol = Symbol()

const Ancestor = {
  setup() {
    provide(ThemeSymbol, 'dark')
  }
}

const Descendent = {
  setup() {
    const theme = inject(ThemeSymbol, 'light' /* optional default value */)
    return {
      theme
    }
  }
}

// 在父组建中
const themeRef = ref('dark')
provide(ThemeSymbol, themeRef)

// 组件中
const theme = inject(ThemeSymbol, ref('light'))
watchEffect(() => {
  console.log(`theme set to: ${theme.value}`)
})

attrs: Object    // 等同 vue 2.x中的 this.$attrs
emit: ƒ ()       // 等同 this.$emit()
isServer: false   // 是否是服务端渲染
listeners: Object   // 等同 vue2.x中的this.$listeners
parent: VueComponent  // 等同 vue2.x中的this.$parent
refs: Object  // 等同 vue2.x中的this.$refs
root: Vue  // 这个root是我们在main.js中，使用newVue()的时候，返回的全局唯一的实例对象，注意别和单文件组建中的this混淆了
slots: {}   // 等同 vue2.x中的this.$slots
ssrContext:{}	// 服务端渲染相关

import { computed, getCurrentInstance } from "@vue/composition-api";
export default {
  name: "svg-icon",
  props: {
    iconClass: {
      type: String,
      required: true
    },
    className: {
      type: String
    }
  },
  setup(initProps,setupContext) { 
  
    const { ctx } = getCurrentInstance();
    const iconName = computed(() => {
      return `#icon-${initProps.iconClass}`;
    });
    const svgClass = computed(() => {
      if (initProps.className) {
        return "svg-icon " + initProps.className;
      } else {
        return "svg-icon";
      }
    });
    return {
      iconName,
      svgClass
    };
  }
};
</script>

import { ref } from '@vue/composition-api'

setup() {
    const active = ref("");
    const timeData = ref(36000000);
    console.log('输出===>',timeData.value)
    return {
       active,
       timeData
    }
}

<template>
  <p>活动状态：{{active}}</p>
  <p>活动时间：{{timeData}}</p>
</template>

const state = reactive({
  list: [ref(0)],
});
// 不会自动展开, 须使用 `.value`
state.list[0].value === 0; // true

state.list.push(ref(1));
// 不会自动展开, 须使用 `.value`
state.list[1].value === 1; // true

  <div class="swiper-cls">
      <swiper :options="swiperOption" ref="mySwiper">
        <swiper-slide v-for="(img ,index) in tabImgs.value" :key="index">
          <img class="slide_img" @click="handleClick(img.linkUrl)" :src="img.imgUrl" />
        </swiper-slide>
      </swiper>
   </div>

import { ref, onMounted } from "@vue/composition-api";
setup(props, { attrs, slots, parent, root, emit, refs }) {
	const mySwiper = ref(null);
  onMounted(() => {
    // 通过mySwiper.value 即可获取到DOM对象！
    // 同时也可以使用vue2.x中的refs.mySwiper ，他其实mySwiper.value 是同一个DOM对象！
    mySwiper.value.swiper.slideTo(3, 1000, false);
  });
  return {
    mySwiper
  }
}

<script>
// 使用相关aip之前必须先引入
import { ref, reactive } from "@vue/composition-api";
export default {
  name: "home",
  setup(props, { attrs, slots, parent, root, emit, refs }) {
    
    const active = ref("");
    const timeData = ref(36000000);
    // 将tabImgs数组中每个对象都变成响应式的对象 
    const tabImgs = reactive({
      value: []
    });
    const ball = reactive({
      show: false,
      el: ""
    });
    return {
      active,
      timeData,
      tabImgs,
      ...toRefs(ball),
    };
  }
};
</script>

<template>
    <div class="swiper-cls">
      <swiper :options="swiperOption" ref="mySwiper">
        <swiper-slide v-for="(img ,index) in tabImgs.value" :key="index">
          <img class="slide_img" @click="handleClick(img.linkUrl)" :src="img.imgUrl" />
        </swiper-slide>
      </swiper>
    </div>
</template>

import { isRef } from '@vue/composition-api'

setup(){
  const headerActive = ref(false);
  // 在setup函数中，如果是响应式的对象，在访问属性的时候，一定要加上.value来访问！
  const unwrapped = isRef(headerActive) ? headerActive.value : headerActive
  return {}
}

import { reactive,toRefs } from '@vue/composition-api'
setup(){
  // ball 是一个 Observer
  const ball = reactive({
    show: false,
    el: ""
  });
  // ballToRefs 就是一个普通的Object，但是ballToRefs里面的所有属性都是响应式的（RefImpl）
  const ballToRefs  = toRefs(ball)
  // ref和原始属性是“链接的”
  ball.show = true
  console.log(ballToRefs.show) // true
  ballToRefs.show.value = false
  console.log(ballToRefs.show) // false
  return {
    ...ballToRefs    // 将ballToRefs对象展开，我们就可以直接在template模板中直接这样使用这个对象上的所有属性！
  }
}

<template>  
  <div class="ballWrap">
      <transition @before-enter="beforeEnter" @enter="enter" @afterEnter="afterEnter">
        <!-- 可以直接使用show-->
        <div class="ball" v-if="show">
          <li class="inner">
            <span class="cubeic-add" @click="addToCart($event,item)">
              <svg-icon class="add-icon" icon-class="add"></svg-icon>
            </span>
          </li>
        </div>
      </transition>
   </div>
</template>

import { computed } from '@vue/composition-api'

const count = ref(1)
// computed接收一个函数作为入参
const plusOne = computed(() => count.value + 1)

console.log(plusOne.value) // 2

plusOne.value++ // 错误，plusOne是只读的！

const count = ref(1)
// computed接收一个对象作为入参
const plusOne = computed({
  get: () => count.value + 1,
  set: val => {
    count.value = val - 1
  }
})

plusOne.value = 1
console.log(count.value) // 0

// watching a getter函数
const state = reactive({ count: 0 })
watch(
  () => state.count, // 返回值的getter函数
  (count, prevCount,onCleanup) => {
    /* ... */
  }
)

// directly watching a ref
const count = ref(0)
watch(
  count, // 也可以直接是ref
  (count, prevCount,onCleanup) => {
  /* ... */
})

const me = reactive({ age: 24, name: 'gk' })
// reactive类型的
watch(
  [() => me.age, () => me.name], // 监听reactive多个数据源，可以传入一个数组类型，返回getter函数
  ([age, name], [oldAge, oldName]) => {
    console.log(age) // 新的 age 值
    console.log(name) // 新的 name 值
    console.log(oldAge) // 旧的 age 值
    console.log(oldName) // 新的 name 值
  },
  // options
  {
    lazy: true //默认 在 watch 被创建的时候执行回调函数中的代码，如果lazy为true ，怎创建的时候，不执行！
  }
)

setInterval(() => {
  me.age++
  me.name = 'oldMe'
}, 7000000)

// ref类型的
const work = ref('web')
const addres = ref('sz')
watch(
  [work,address],  // 监听多个ref数据源
  ([work, addres], [oldwork, oldaddres]) => {
   //......
  },
  {
    lazy: true 
  }
)

// watch 返回一个函数句柄，我们可以决定该watch的停止和开始！
const stopWatch = watch(
  [work,address],  // 监听多个ref数据源
  ([work, addres], [oldwork, oldaddres]) => {
   //......
  },
  {
    lazy: true 
  }
)

// 调用停止函数，清除对work和address的监视
stopWatch()

<div class="search-con">
  <svg-icon class="search-icon" icon-class="search"></svg-icon>
  <input v-focus placeholder="搜索、关键词" v-model="searchText" />
</div>

setup(props, { attrs, slots, parent, root, emit, refs }){
  const CancelToken = root.$http.CancelToken 
  const source = CancelToken.source() 
  // 定义响应式数据 searchText
  const searchText = ref('')

  // 向后台发送异步请求
  const getSearchResult = searchText => {
   root.$http.post("http://test.happymmall.com/search",{text:searchText}, {
     cancelToken: source.token
   }).then(res => {
    // .....
   });
  return source.cancel
}

// 定义 watch 监听
watch(
  searchText,
  (searchText, oldSearchText, onCleanup) => {
    // 发送axios请求，并得到取消axios请求的 cancel函数
    const cancel = getSearchResult(searchText)

    // 若 watch 监听被重复执行了，则会先清除上次未完成的异步请求
    onCleanup(cancel)
  },
  // watch 刚被创建的时候不执行
  { lazy: true }
)

  return {
    searchText
  }
}