vue项目实现面包屑导航

npm i vuex

<template>
  <div class="tags-view-container">
    <scroll-pane class="tags-view-wrapper" ref="scrollPane">
      <router-link 
        ref="tag"  
        :to="tag"  
        :class="isActive(tag)? 'action' : ''" 
        class='scrollPane_item'
        @contextmenu.prevent.native="openMenu(tag,$event)" 
        v-for="tag in Array.from(visitedViews)" 
        :key="tag.path">
        {{tag.title}}
        <span class="el-icon-error close_Icon" :class="isActive(tag)? 'IconActive' : ''"  @click.prevent.stop='closeSelectedTag(tag)'></span>
      </router-link>
    </scroll-pane>
    <ul class='contextmenu' v-show="visible" :style="{ left: left+'px', top: top+'px'}">
      <li @click="closeSelectedTag(selectedTag)">关闭</li>
      <li @click="closeOthersTags">关闭其他</li>
      <li @click="closeAllTags">关闭所有</li>
    </ul>
  </div>
</template>
 
<script>
  import ScrollPane from '../scrollPane/scrollpane'
  export default {
    name: "tags-view",
    components: { ScrollPane },
    data(){
      return{
        visible: false,
        top: 0,
        left: 0,
        selectedTag: {},
        ScrollAction: false
      }
    },
    computed:{
      visitedViews(){
        return this.$store.state.tagsView.visitedViews
      }
    },
    watch:{
      $route(){
        this.addViewTags()
        this.moveToCurrentTag()
      },
      visible(value) {
        if (value) {
          document.body.addEventListener('click', this.closeMenu)
        } else {
          document.body.removeEventListener('click', this.closeMenu)
        }
      }
    },
    mounted() {
      this.addViewTags()
    },
    methods:{
      generateRoute(){
        if (this.$route.name) {
          return this.$route
        }
        return false
      },
      isActive(route) {
        return route.path === this.$route.path
      },
      addViewTags() {
        const route = this.generateRoute()
        if (!route) {
          return false
        }
        this.$store.dispatch('addVisitedViews', route)
      },
      moveToCurrentTag() {
        const tags = this.$refs.tag
        this.$nextTick(() => {
          for (const tag of tags) {
            if (tag.to.path === this.$route.path) {
              this.$refs.scrollPane.moveToTarget(tag.$el)
              break
            }
          }
        })
      },
      closeSelectedTag(view) {
        this.$store.dispatch('delVisitedViews', view).then((views) => {
          if (this.isActive(view)) {
            const latestView = views.slice(-1)[0]
            if (latestView) {
              this.$router.push(latestView)
            } else {
              this.$router.push('/homePage')
            }
          }
        })
      },
      closeOthersTags() {
        this.$router.push(this.selectedTag)
        this.$store.dispatch('delOthersViews', this.selectedTag).then(() => {
          this.moveToCurrentTag()
        })
      },
      closeAllTags() {
        this.$store.dispatch('delAllViews')
        this.$router.push('/homePage')
      },
      openMenu(tag, e) {
        this.visible = true
        this.selectedTag = tag
        this.left = e.clientX  + 30 // 15: margin right
        this.top = e.clientY
      },
      closeMenu() {
        this.visible = false
      }
    }
  }
</script> 
<style>
  @import './tagView.scss';
</style> 

.tags-view-container {
  height: 100%;
}
.contextmenu {
  margin: 0;
  background: #fff;
  z-index: 100;
  position: absolute;
  list-style-type: none;
  padding: 5px 0;
  border-radius: 4px;
  font-size: 12px;
  font-weight: 400;
  color: #333;
  box-shadow: 2px 2px 3px 0 rgba(0, 0, 0, .3);
  
}
.contextmenu li {
  margin: 0;
  padding: 7px 16px;
  cursor: pointer;
}
.contextmenu li:hover {
  background: #eee;
}
.tags-view-wrapper a {
  display: inline-block;
  position: relative;
  width: 100px;
  padding: 0 10px;
  color: #000;
  background: #fff;
  text-align: center;
  font-size: 15px;
}
.action {
  border-bottom: 2px solid #1AB394;
}
.close_Icon {
  color: #fff;
  margin-left: 3px;
}
.IconActive {
  color: #b1b1b1;
}

const tagsView = {
  state: {
    visitedViews: [],
    cachedViews: []
  },
  mutations: {
    ADD_VISITED_VIEWS: (state, view) => {
      if (state.visitedViews.some(v => v.path === view.path)) return
      state.visitedViews.push(Object.assign({}, view, {
        title: view.meta.title || 'no-name'
      }))
      if (!view.meta.noCache) {
        state.cachedViews.push(view.name)
      }
    },
    DEL_VISITED_VIEWS: (state, view) => {
      for (const [i, v] of state.visitedViews.entries()) {
        if (v.path === view.path) {
          state.visitedViews.splice(i, 1)
          break
        }
      }
      for (const i of state.cachedViews) {
        if (i === view.name) {
          const index = state.cachedViews.indexOf(i)
          state.cachedViews.splice(index, 1)
          break
        }
      }
    },
    DEL_OTHERS_VIEWS: (state, view) => {
      for (const [i, v] of state.visitedViews.entries()) {
        if (v.path === view.path) {
          state.visitedViews = state.visitedViews.slice(i, i + 1)
          break
        }
      }
      for (const i of state.cachedViews) {
        if (i === view.name) {
          const index = state.cachedViews.indexOf(i)
          state.cachedViews = state.cachedViews.slice(index, i + 1)
          break
        }
      }
    },
    DEL_ALL_VIEWS: (state) => {
      state.visitedViews = []
      state.cachedViews = []
    }
  },
  actions: {
    addVisitedViews({ commit }, view) {
      commit('ADD_VISITED_VIEWS', view)
    },
    delVisitedViews({ commit, state }, view) {
      return new Promise((resolve) => {
        commit('DEL_VISITED_VIEWS', view)
        resolve([...state.visitedViews])
      })
    },
    delOthersViews({ commit, state }, view) {
      return new Promise((resolve) => {
        commit('DEL_OTHERS_VIEWS', view)
        resolve([...state.visitedViews])
      })
    },
    delAllViews({ commit, state }) {
      return new Promise((resolve) => {
        commit('DEL_ALL_VIEWS')
        resolve([...state.visitedViews])
      })
    }
  }
}
export default tagsView

<template>
  <div class="scroll-container" ref="scrollContainer" @wheel.prevent="handleScroll">
    <div class="scroll-wrapper" ref="scrollWrapper" :style="{left: left + 'px'}">
      <slot></slot>
    </div>
  </div>
</template>
 
<script>
  const padding = 15 // tag's padding
 
  export default {
    name: 'scrollPane',
    data() {
      return {
        left: 0
      }
    },
    methods: {
      handleScroll(e) {
        const eventDelta = e.wheelDelta || -e.deltaY * 3//wheelDelta:-120;deltaY:-120
        const $container = this.$refs.scrollContainer//外面的container
        const $containerWidth = $container.offsetWidth//外面的container的宽度
        const $wrapper = this.$refs.scrollWrapper//里面
        const $wrapperWidth = $wrapper.offsetWidth//里面的宽度
 
        if (eventDelta > 0) {
          this.left = Math.min(0, this.left + eventDelta)//min() 方法可返回指定的数字中带有最低值的数字。
        } else {
          if ($containerWidth - padding < $wrapperWidth) {
            if (this.left < -($wrapperWidth - $containerWidth + padding)) {
              this.left = this.left
            } else {
              this.left = Math.max(this.left + eventDelta, $containerWidth - $wrapperWidth - padding)
            }
          } else {
            this.left = 0
          }
        }
      },
      moveToTarget($target) {
        const $container = this.$refs.scrollContainer
        const $containerWidth = $container.offsetWidth
        const $targetLeft = $target.offsetLeft
        const $targetWidth = $target.offsetWidth
 
        if ($targetLeft < -this.left) {
          this.left = -$targetLeft + padding
        } else if ($targetLeft + padding > -this.left && $targetLeft + $targetWidth < -this.left + $containerWidth - padding) {
        } else {
          this.left = -($targetLeft - ($containerWidth - $targetWidth) + padding)
        }
      }
    }
  }
</script>
<style>
  .scroll-container {
    white-space: nowrap;
    position: relative;
    overflow: hidden;
    width: 100%;
    height: 100%;
    box-sizing: border-box;
  }
  .scroll-wrapper {
    height: 100%;
    line-height: 41px;
    position: absolute;
  }
</style>

import Vue from 'vue'
import Vuex from 'vuex'
import * as types from './types'
import tagsView from '../assets/js/tagsview'

Vue.use(Vuex) 

const store = new Vuex.Store({ 
  modules: {
    tagsView
  }
})
export default store

export const LOGIN = 'login'
export const LOGOUT = 'logout'
export const TITLE = 'title'

import store from './store/index' // 导入状态管理器VueX 
new Vue({
  el: '#app',
  router,
  store,
  components: { App },
  template: '<App/>'
})