Tags-view 中的数组是缓存在 vuex 里面的,然后一开始我司用的解决 vuex 刷新消失的插件是
vue-along
,但是使用了这个插件就会报错Cannot convert a Symbol value to a string
,最后发现是因为这个插件会遍历传进来的 data,存在循环引用;然而 Tags-view 用的是合并对象方法是Object.assign
,这个方法是浅复制,会影响原有的;
解决方案:
- 更换 vuex 持久化插件
vuex-persistedstate
1. /src/store/index.js 代码如下
vuex-persistedstate 的reduce 函数下面的是需要持久化的,需要遍历,然后 Tags-view 的不用 vuex-persistedstate 缓存,就不会存在循环引用,也就是不会报错;具体的vuex-persistedstate用法在以下两篇教程都可找到;PS:也都是我写哒~
import Vue from "vue";
import Vuex from "vuex";
import getters from "./getters";
// import createVuexAlong from 'vuex-along'
import createPersistedState from "vuex-persistedstate";
Vue.use(Vuex);
// https://webpack.js.org/guides/dependency-management/#requirecontext
const modulesFiles = require.context("./modules", true, /\.js$/);
// you do not need `import app from './modules/app'`
// it will auto require all vuex module from modules file
const modules = modulesFiles.keys().reduce((modules, modulePath) => {
// set './app.js' => 'app'
const moduleName = modulePath.replace(/^\.\/(.*)\.\w+$/, "$1");
const value = modulesFiles(modulePath);
modules[moduleName] = value.default;
return modules;
}, {});
const store = new Vuex.Store({
plugins: [
createPersistedState({
storage: window.localStorage,
reducer(val) {
return {
// 需要储存的数据
user: val.user,
settings: val.settings,
permission: val.permission,
app: val.app,
};
},
}),
],
modules,
getters,
// plugins: [createVuexAlong()]
});
export default store;
2. /src/layout/components/TagsView/index.vue 代码如下:
2.1 重点代码,就是我新加的代码
mounted() {
// 页面刷新前缓存和赋值
this.beforeUnload();
this.initTags()
this.addTags()
},
beforeUnload() {
// 监听页面刷新
window.addEventListener("beforeunload", () => {
// visitedViews数据结构太复杂无法直接JSON.stringify处理,先转换需要的数据
let tabViews = this.visitedViews.map(item => {
return {
fullPath: item.fullPath,
hash: item.hash,
meta: { ...item.meta },
name: item.name,
params: { ...item.params },
path: item.path,
query: { ...item.query },
title: item.title
};
});
sessionStorage.setItem("tabViews", JSON.stringify(tabViews));
});
// 页面初始化加载判断缓存中是否有数据
let oldViews = JSON.parse(sessionStorage.getItem("tabViews")) || [];
if (oldViews.length > 0) {
this.$store.state.tagsView.visitedViews = oldViews;
sessionStorage.clear();
}
},
2.1. 全部代码
<template>
<div id="tags-view-container" class="tags-view-container">
<scroll-pane ref="scrollPane" class="tags-view-wrapper" @scroll="handleScroll">
<router-link
v-for="tag in visitedViews"
ref="tag"
:key="tag.path"
:class="isActive(tag)?'active':''"
:to="{ path: tag.path, query: tag.query, fullPath: tag.fullPath }"
tag="span"
class="tags-view-item"
@click.middle.native="!isAffix(tag)?closeSelectedTag(tag):''"
@contextmenu.prevent.native="openMenu(tag,$event)"
>
{{ tag.title }}
<span v-if="!isAffix(tag)" class="el-icon-close" @click.prevent.stop="closeSelectedTag(tag)" />
</router-link>
</scroll-pane>
<ul v-show="visible" :style="{left:left+'px',top:top+'px'}" class="contextmenu">
<li @click="refreshSelectedTag(selectedTag)">Refresh</li>
<li v-if="!isAffix(selectedTag)" @click="closeSelectedTag(selectedTag)">Close</li>
<li @click="closeOthersTags">Close Others</li>
<li @click="closeAllTags(selectedTag)">Close All</li>
</ul>
</div>
</template>
<script>
import ScrollPane from './ScrollPane'
import path from 'path'
export default {
components: { ScrollPane },
data() {
return {
visible: false,
top: 0,
left: 0,
selectedTag: {},
affixTags: []
}
},
computed: {
visitedViews() {
return this.$store.state.tagsView.visitedViews
},
routes() {
return this.$store.state.permission.routes
}
},
watch: {
$route() {
this.addTags()
this.moveToCurrentTag()
},
visible(value) {
if (value) {
document.body.addEventListener('click', this.closeMenu)
} else {
document.body.removeEventListener('click', this.closeMenu)
}
}
},
mounted() {
// 页面刷新前缓存和赋值
this.beforeUnload();
this.initTags()
this.addTags()
},
methods: {
isActive(route) {
return route.path === this.$route.path
},
isAffix(tag) {
return tag.meta && tag.meta.affix
},
filterAffixTags(routes, basePath = '/') {
let tags = []
routes.forEach(route => {
if (route.meta && route.meta.affix) {
const tagPath = path.resolve(basePath, route.path)
tags.push({
fullPath: tagPath,
path: tagPath,
name: route.name,
meta: { ...route.meta }
})
}
if (route.children) {
const tempTags = this.filterAffixTags(route.children, route.path)
if (tempTags.length >= 1) {
tags = [...tags, ...tempTags]
}
}
})
return tags
},
beforeUnload() {
// 监听页面刷新
window.addEventListener("beforeunload", () => {
// visitedViews数据结构太复杂无法直接JSON.stringify处理,先转换需要的数据
let tabViews = this.visitedViews.map(item => {
return {
fullPath: item.fullPath,
hash: item.hash,
meta: { ...item.meta },
name: item.name,
params: { ...item.params },
path: item.path,
query: { ...item.query },
title: item.title
};
});
sessionStorage.setItem("tabViews", JSON.stringify(tabViews));
});
// 页面初始化加载判断缓存中是否有数据
let oldViews = JSON.parse(sessionStorage.getItem("tabViews")) || [];
if (oldViews.length > 0) {
this.$store.state.tagsView.visitedViews = oldViews;
sessionStorage.clear();
}
},
initTags() {
const affixTags = this.affixTags = this.filterAffixTags(this.routes)
for (const tag of affixTags) {
// Must have tag name
if (tag.name) {
this.$store.dispatch('tagsView/addVisitedView', tag)
}
}
},
addTags() {
const { name } = this.$route
if (name) {
this.$store.dispatch('tagsView/addView', this.$route)
}
return false
},
moveToCurrentTag() {
const tags = this.$refs.tag
this.$nextTick(() => {
for (const tag of tags) {
if (tag.to.path === this.$route.path) {
this.$refs.scrollPane.moveToTarget(tag)
// when query is different then update
if (tag.to.fullPath !== this.$route.fullPath) {
this.$store.dispatch('tagsView/updateVisitedView', this.$route)
}
break
}
}
})
},
refreshSelectedTag(view) {
this.$store.dispatch('tagsView/delCachedView', view).then(() => {
const { fullPath } = view
this.$nextTick(() => {
this.$router.replace({
path: '/redirect' + fullPath
})
})
})
},
closeSelectedTag(view) {
this.$store.dispatch('tagsView/delView', view).then(({ visitedViews }) => {
if (this.isActive(view)) {
this.toLastView(visitedViews, view)
}
})
},
closeOthersTags() {
this.$router.push(this.selectedTag)
this.$store.dispatch('tagsView/delOthersViews', this.selectedTag).then(() => {
this.moveToCurrentTag()
})
},
closeAllTags(view) {
this.$store.dispatch('tagsView/delAllViews').then(({ visitedViews }) => {
if (this.affixTags.some(tag => tag.path === view.path)) {
return
}
this.toLastView(visitedViews, view)
})
},
toLastView(visitedViews, view) {
const latestView = visitedViews.slice(-1)[0]
if (latestView) {
this.$router.push(latestView.fullPath)
} else {
// now the default is to redirect to the home page if there is no tags-view,
// you can adjust it according to your needs.
if (view.name === 'Dashboard') {
// to reload home page
this.$router.replace({ path: '/redirect' + view.fullPath })
} else {
this.$router.push('/')
}
}
},
openMenu(tag, e) {
const menuMinWidth = 105
const offsetLeft = this.$el.getBoundingClientRect().left // container margin left
const offsetWidth = this.$el.offsetWidth // container width
const maxLeft = offsetWidth - menuMinWidth // left boundary
const left = e.clientX - offsetLeft + 15 // 15: margin right
if (left > maxLeft) {
this.left = maxLeft
} else {
this.left = left
}
this.top = e.clientY
this.visible = true
this.selectedTag = tag
},
closeMenu() {
this.visible = false
},
handleScroll() {
this.closeMenu()
}
}
}
</script>
<style lang="scss" scoped>
.tags-view-container {
height: 34px;
width: 100%;
background: #fff;
border-bottom: 1px solid #d8dce5;
box-shadow: 0 1px 3px 0 rgba(0, 0, 0, .12), 0 0 3px 0 rgba(0, 0, 0, .04);
.tags-view-wrapper {
.tags-view-item {
display: inline-block;
position: relative;
cursor: pointer;
height: 26px;
line-height: 26px;
border: 1px solid #d8dce5;
color: #495060;
background: #fff;
padding: 0 8px;
font-size: 12px;
margin-left: 5px;
margin-top: 4px;
&:first-of-type {
margin-left: 15px;
}
&:last-of-type {
margin-right: 15px;
}
&.active {
background-color: #42b983;
color: #fff;
border-color: #42b983;
&::before {
content: '';
background: #fff;
display: inline-block;
width: 8px;
height: 8px;
border-radius: 50%;
position: relative;
margin-right: 2px;
}
}
}
}
.contextmenu {
margin: 0;
background: #fff;
z-index: 3000;
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);
li {
margin: 0;
padding: 7px 16px;
cursor: pointer;
&:hover {
background: #eee;
}
}
}
}
</style>
<style lang="scss">
//reset element css of el-icon-close
.tags-view-wrapper {
.tags-view-item {
.el-icon-close {
width: 16px;
height: 16px;
vertical-align: 2px;
border-radius: 50%;
text-align: center;
transition: all .3s cubic-bezier(.645, .045, .355, 1);
transform-origin: 100% 50%;
&:before {
transform: scale(.6);
display: inline-block;
vertical-align: -3px;
}
&:hover {
background-color: #b4bccc;
color: #fff;
}
}
}
}
</style>