vue Element
<el-table v-show="res" border ref="multipleTable" :data="projectList" tooltip-effect="dark" @selection-change="handleSelectionChange" @select="handleSelection" @row-click="clickRow" :row-class-name="tableRowClassName"> <el-table-column type="selection" width="30"></el-table-column> <el-table-column label="ID" prop="id"> <template slot-scope="scope">{{ scope.row.id }}</template> </el-table-column> <el-table-column label="项目名称" prop="name"> <template slot-scope="scope">{{scope.row.name}}</template> </el-table-column> <el-table-column label="征收范围" prop="levy_scope"> <template slot-scope="scope">{{scope.row.levy_scope}}</template> </el-table-column> <el-table-column label="拆迁公司" prop="actuator"> <template slot-scope="scope">{{scope.row.actuator}}</template> </el-table-column></el-table>
.el-table >>> .warning-row { background-color: #f5f7fa;}
点击选框 点击整行 都可以变色
handleSelectionChange(val) { this.multipleSelection=val; console.log("选择框发生变化", val);},handleSelection(val, row) { // 表单绑定的数据 this.projectList.forEach((item, i)=> { if (item.id==row.id) { /* console.log(this.numbers.indexOf(i)) */ if (this.numbers.indexOf(i)==-1) { this.numbers.push(i); } else { this.numbers.splice(this.numbers.indexOf(i), 1); } } });},// 点击整行选中clickRow(row, event, column) { this.$refs.multipleTable.toggleRowSelection(row); this.projectList.forEach((r, i)=> { if (r.id==row.id) { /* console.log(this.numbers.indexOf(i)) */ if (this.numbers.indexOf(i)==-1) { this.numbers.push(i); } else { this.numbers.splice(this.numbers.indexOf(i), 1); } } }); },// 选中背景色tableRowClassName({ row, rowIndex }) { let color=""; this.numbers.forEach((r, i)=> { if (rowIndex===r) { color="warning-row"; } }); return color;}
参考:https://jsfiddle.net/L5do6L3k/61/
暗黑模式在过去几年中最受欢迎,各大操作系统也全部支持了暗黑模式,并在浏览器中提供了查询是否开启暗黑模式的接口。接下来以vue3的element-plus为例,通过切换全局css变量的方式,实现主题换肤与暗黑模式设置。
一、主流换肤实现思路
1. 修改全局CSS变量
在全局css文件或 app.vue中定义全局CSS变量<style>:root{--background_color:red}</style>
其他组件使用全局CSS变量<style scoped>.test{background: var(--background_color);}</style>
切换主题(修改全局CSS变量)const changeTheme=()=> { document.documentElement.style.setProperty("--background_color","green");}
2. 切换主题CSS文件
新建多套主题的css文件,放在assets文件夹的css文件夹中# assets/css/theme_green.css.bg {background: green;}# assets/css/theme_red.css.bg {background: red;}
设置默认主题(初始化样式)# src/App.vueimport {onMounted} from "vue";onMounted(()=> {let link=document.createElement('link');link.type='text/css';link.id="theme";link.rel='stylesheet';link.href='assets/css/theme_red.css';document.getElementsByTagName("head")[0].appendChild(link);},
切换主题const changeTheme=()=> {document.getElementById('theme').href='assets/css/theme_green.css'}
3. 使用css预处理器(例如 scss,通过mixin混入器切换)
新建一个scss文件,里面配置不同的主题配色方案$themes: ( light: ( //字体 font_color1: #414141, font_color2: white, //背景 background_color1: #fff, background_color2: #f0f2f5, ), dark: ( //字体 font_color1: #a7a7a7, font_color2: white, //背景 background_color1: #1b2531, background_color2: #283142, ));
定义另外一个sass文件,来操作前面的$theme变量(当然两个文件可以合并,分开写是想把配置和操作解耦)@import "./_themes.scss";//遍历主题map@mixin themeify { @each $theme-name, $theme-map in $themes { //!global 把局部变量强升为全局变量 $theme-map: $theme-map !global; //判断html的data-theme的属性值 #{}是sass的插值表达式 //& sass嵌套里的父容器标识 @content是混合器插槽,像vue的slot [data-theme="#{$theme-name}"] & { @content; } }}//声明一个根据Key获取颜色的function@function themed($key) { @return map-get($theme-map, $key);}//获取背景颜色@mixin background_color($color) { @include themeify { background-color: themed($color)!important; }}//获取字体颜色@mixin font_color($color) { @include themeify { color: themed($color)!important; }}
在vue组件中使用,引入对应混入器<style lang="scss" scoped> @import "@/style/_handle.scss"; .test { @include font_color("font_color1"); @include background_color("background_color1"); }</style>
切换主题const theme=(type)=> { window.document.documentElement.setAttribute( "data-theme", type );}
二、项目案例
1. 思路分析
参考element-plus文档https://element-plus.gitee.io/zh-CN/guide/theming.html#%E6%9B%B4%E6%8D%A2%E4%B8%BB%E9%A2%98%E8%89%B2,element-plus提供了SCSS变量和CSS变量两种方式实现主题换肤。相比较而言,使用CSS变量实现更加便捷,代码也更易编写。
要想实现暗黑模式和明亮模式切换,首先使用vuex定义全局主题色已经是否开启暗黑模式变量并管理。然后创建一个颜色处理模块以及暗黑模式、主题色处理函数文件。最后根据需求,直接替换颜色即可。
2. 项目目录结构
├── store // vuex文件夹| ├── index.js // vuex入口文件| ├── mutations.js // 更改state中状态的逻辑| └── state.js // 存放状态├── utils| ├── color.js // 定义主题色以及暗黑模式、明亮模式颜色变量| ├── dark.js // 暗黑模式切换处理模块| └── theme.js // 主题色切换模块├── components| └── NavMenu.vue // 自定义组件,用于设置是否切换暗黑模式、主题色等操作├── views| └── Home.vue // 项目Home页
3. vuex配置
state.js(定义状态变量,存放状态)const state={// 是否开启暗黑模式dark: false,// 默认主题色theme:'#409eff',}export default state
mutations.js(定义处理state状态的操作逻辑)const mutations={// 是否开启暗黑模式setDark(state, value) {state.dark=value},// 设置主题色setTheme(state, value) {state.theme=value},}export default mutations
index.js(此处使用vuex-along实现状态持久化管理)import {createStore} from 'vuex'import mutations from '@/store/mutations'import state from "@/store/state";import createVuexAlong from 'vuex-along'export default createStore({state,mutations,plugins: [createVuexAlong({local: {list: [ ],},session: {list: ["dark", "theme"],}})]})
3. 定义颜色处理模块
color.js(定义颜色变量值)// 颜色管理import {ref} from "vue";function color() {// 主题颜色变量组const themeList=ref([{name: '拂晓蓝(默认)', value: '#409eff'},{name: '薄暮红', value: '#e74c3c'},{name: '火山橘', value: '#e67e22'},{name: '日暮黄', value: '#f1c40f'},{name: '极光绿', value: '#16a085'},{name: '酱紫', value: '#9b59b6'},])// 明亮模式全局颜色const lightList=ref([{name: '--el-background-color-base', value: '#f5f7fa'},{name: '--el-color-white', value: '#ffffff'},{name: '--el-text-color-primary', value: '#303133'},{name: '--el-text-color-regular', value: '#606266'},{name: '--el-color-primary-light-9', value: '#ecf5ff'},{name: '--el-border-color-base', value: '#dcdfe6'},{name: '--el-border-color-light', value: '#e4e7ed'},{name: '--el-border-color-extra-light', value: '#f2f6fc'},{name: '--el-border-color-lighter', value: '#ebeef5'},])// 暗黑模式全局颜色const darkList=ref([{name: '--el-background-color-base', value: '#000000'},{name: '--el-color-white', value: '#141414'},{name: '--el-text-color-primary', value: '#ffffff'},{name: '--el-text-color-regular', value: '#d0d0d0'},{name: '--el-color-primary-light-9', value: '#1f1f1f'},{name: '--el-border-color-base', value: '#434343'},{name: '--el-border-color-light', value: '#434343'},{name: '--el-border-color-extra-light', value: '#5c5c5c'},{name: '--el-border-color-lighter', value: '#434343'},])return {darkList, themeList}}export default color
dark.js(暗黑模式切换模块)import {computed, onMounted, ref} from "vue";import store from "@/store/index";import color from "@/utils/color"import {useCssVar} from "@vueuse/core";function dark() {let {darkList, lightList}=color()// 当前是否开启暗黑模式const isDark=computed(()=> store.state.dark)// 切换暗黑模式const setDark=(value)=> {store.commit('setDark', value)console.log("执行切换开启暗黑模式事件:", isDark.value)const el=ref(null)if (isDark.value) {console.log("要切换为暗黑模式")darkList.value.forEach((item, index)=> {index=useCssVar(item.name, el)index.value=item.value})} else {console.log("要切换为明亮模式")lightList.value.forEach((item, index)=> {index=useCssVar(item.name, el)index.value=item.value})}}onMounted(()=> {// console.log("是否开启暗黑模式:",isDark)setDark(isDark.value)})return {setDark,}}export default dark
theme.js(主题色切换模块)import {computed, onMounted, ref} from "vue";import store from "@/store/index";import {useCssVar} from "@vueuse/core";function theme() {// 当前默认主题色const themeValue=computed(()=> store.state.theme)// 切换主题色const setTheme=(value)=> {store.commit('setTheme', value)console.log("执行切换主题色事件:", themeValue.value)const el=ref(null)const primary_color=useCssVar('--el-color-primary', el)primary_color.value=themeValue.value}onMounted(()=> {setTheme(themeValue.value)})return {setTheme,}}export default theme
4. element-plus组件主题配置
通过浏览器审查元素可知,element plus组件都使用了css全局变量色,切换暗黑主题时,只需要更改全局变量的值即可,切换主题时,更换el-color-primary的值即可。
5. 自定义组件主题配置
为了保持全局样式风格统一,自定义组件设置样式时,使用element-plus定义的全局变量即可。
.test { cursor: pointer; background-color: var(--el-color-primary); transition: all 0.5s;}
6. 组件调用切换主题和深色模式
n<template> <transition enter-active-class="animate__animated animate__fadeInDown" leave-active-class="animate__animated animate__fadeOutUp"> <header> <el-drawer title="系统设置" v-model="drawer" :direction="'rtl'" :size="'25%'" :before-close="handleClose" destroy-on-close > <span> <el-divider></el-divider> <div class="display"> <h4>显示模式</h4> <span> <img :class="isDark===true?'':'img-active'" src="~@/assets/images/light.png" alt=""> <img :class="isDark===false?'':'img-active'" src="~@/assets/images/dark.png" alt=""> </span> <el-switch style="display: block" v-model="isDark" active-color="#303133" inactive-color="#f5f7fa" active-text="深色模式" inactive-text="浅色模式" @change="setDarkMode" /> </div> <el-divider></el-divider> <div class="color"> <h4>主题色</h4> <div> <el-tooltip v-for="(item,index) in themeList" :key="index" effect="dark" :content="item.name" placement="top"> <span :style="{backgroundColor:item.value}" :class="(colorValue===item.value?'color-active ':'')" @click="colorChoose(item.value)"></span> </el-tooltip> </div> </div> <el-divider></el-divider> </el-drawer> </header> </transition> <div class="placeholder"></div></template><script setup>import {ElMessageBox, ElMessage} from 'element-plus'import {computed, onMounted, reactive, ref} from "vue";import store from "@/store/index";import dark from "@/utils/dark";import color from "@/utils/color"import theme from "@/utils/theme"let {setDark}=dark()let {setTheme}=theme()let {themeList}=color()//设置-菜单默认关闭let drawer=ref(false);//设置-菜单关闭事件const handleClose=()=> { drawer.value=false};// 设置-显示模式默认值const isDark=ref(false)// 设置-切换是否设置暗黑模式const setDarkMode=()=> { console.log("菜单栏执行切换事件", isDark.value) setDark(isDark.value)}// 设置-默认主题色const colorValue=ref('')// 设置-切换主题色事件const colorChoose=(value)=> { colorValue.value=value console.log(colorValue.value) setTheme(colorValue.value)}</script><style scoped lang="scss"></style>
7. 跟随系统设置暗黑主题
使用 matchMedia 方法可以直接获取浏览器当前是否使用深色模式
App.vue<template> <div class="router-view"> <router-view v-slot="{ Component }"> <component :is="Component"/> </router-view> </div></template><script setup>import {onMounted} from "vue";import dark from "@/utils/dark";let {setDark}=dark()const locale=zhCnonMounted(()=> { const is_dark=window.matchMedia('(prefers-color-scheme: dark)').matches setDark(is_dark)})</script><style lang="scss">.router-view { color: var(--el-text-color-primary); background-color: var(--el-background-color-base); transition: background 1s, color 0.6s; width: 100%; height: max-content; min-height: 100vh; position: absolute; top: 0; bottom: 0; margin: 0 auto; -webkit-overflow-scrolling: touch; animation-timing-function: linear;}</style>
三、效果演示
1. 设置暗黑模式与主题色菜单
2. 开启暗黑模式
3. 切换主题色(深色绿)
4. 切换主题色(浅色紫)
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