vue+element-ui實(shí)現(xiàn)主題切換功能
element-ui提供了自定義主題 自定義主題
一、安裝
- npm i element-theme -g
- npm i element-theme-chalk -D
- npm i https://github.com/ElementUI/theme-chalk -D
- 官網(wǎng)說明安裝完成后需要et -i并會(huì)有element-variables.scss文件,但是我文件中并未找到
node_modules/.bin/et
,所以手動(dòng)生成了
下圖element-variables.scss是自己寫的,因?yàn)榘惭b完成后并未生成此文件
文件中讓內(nèi)容如下`/* 改變主題色變量 */
``` /* 改變主題色變量,設(shè)置完成后會(huì)有按鈕字體等組件會(huì)變化 */ $--color-primary: #d85f6a; /* 改變 icon 字體路徑變量,必需 */ $--font-path: '~element-ui/lib/theme-chalk/fonts'; @import "~element-ui/packages/theme-chalk/src/index"; ```
頁面文件:index.vue
<el-radio-group v-model="themeRadio" @change="changeClick" size="mini"> <el-radio label="#d85f6a">紅色主題</el-radio> <el-radio label="#409EFF">藍(lán)色主題</el-radio> </el-radio-group> 文件引入: import ColorPicker from "@/layout/colorpicker/index"; 使用: <color-picker :colorVal="colorVal"></color-picker> 方法: changeClick(value){ this.colorVal = value localStorage.setItem('skin',value) this.$store.commit("setSkin",value) },
colorpicker.vue文件,文件內(nèi)容如下:
<template> <el-color-picker v-if="false" v-model="theme" :predefine="['#409EFF', '#1890ff', '#304156','#212121','#11a983', '#13c2c2', '#6959CD', '#f5222d', ]" class="theme-picker" popper-class="theme-picker-dropdown" /> </template> <script> const version = require('element-ui/package.json').version // element-ui version from node_modules const ORIGINAL_THEME = '#409EFF' // default color import { Loading } from 'element-ui'; export default { props:{ //在頁面中將colorVal傳進(jìn)來 colorVal:{ type:String, } }, created(){ // let option={ // background:'#FFFFFF' // } this.loadingInstance =Loading.service(); //這里增加加載loadding,因?yàn)樗⑿马撁鏁?huì)出現(xiàn)延遲 }, data() { return { chalk: '', // content of theme-chalk css theme: '', loadingInstance:true } }, computed: { defaultTheme() { // 將選擇的顏色屬性保存在vuex中,如果頁面刷新娶不到就從ocalStorage中取 if(this.$store.state.skin) return this.$store.state.skin; else return localStorage.getItem('skin') // return this.$store.state.skin } }, watch: { defaultTheme:{ handler: function(val) { this.$nextTick(() => { // this.$emit('input', this.model); this.theme = val }) }, immediate: true }, async theme(val) { const oldVal = this.chalk ? this.theme : ORIGINAL_THEME if (typeof val !== 'string') return const themeCluster = this.getThemeCluster(val.replace('#', '')) const originalCluster = this.getThemeCluster(oldVal.replace('#', '')) const $message = this.$message({ message: ' Compiling the theme', customClass: 'theme-message', type: 'success', duration: 0, iconClass: 'el-icon-loading' }) const getHandler = (variable, id) => { return () => { const originalCluster = this.getThemeCluster(ORIGINAL_THEME.replace('#', '')) const newStyle = this.updateStyle(this[variable], originalCluster, themeCluster) let styleTag = document.getElementById(id) if (!styleTag) { styleTag = document.createElement('style') styleTag.setAttribute('id', id) document.head.appendChild(styleTag) } styleTag.innerText = newStyle } } if (!this.chalk) { const url = `https://unpkg.com/element-ui@${version}/lib/theme-chalk/index.css` await this.getCSSString(url, 'chalk') } const chalkHandler = getHandler('chalk', 'chalk-style') chalkHandler() const styles = [].slice.call(document.querySelectorAll('style')) .filter(style => { const text = style.innerText return new RegExp(oldVal, 'i').test(text) && !/Chalk Variables/.test(text) }) styles.forEach(style => { const { innerText } = style if (typeof innerText !== 'string') return style.innerText = this.updateStyle(innerText, originalCluster, themeCluster) }) this.$emit('change', val) $message.close() // this.$message({ // message:'皮膚切換成功', // type:'success' // }) this.$nextTick(() => { // 以服務(wù)的方式調(diào)用的 Loading 需要異步關(guān)閉 // this.loadingInstance.close(); }) setTimeout(()=>{ this.loadingInstance.close(); },1000) } }, methods: { updateStyle(style, oldCluster, newCluster) { let newStyle = style oldCluster.forEach((color, index) => { newStyle = newStyle.replace(new RegExp(color, 'ig'), newCluster[index]) }) return newStyle }, getCSSString(url, variable) { return new Promise(resolve => { const xhr = new XMLHttpRequest() xhr.onreadystatechange = () => { if (xhr.readyState === 4 && xhr.status === 200) { this[variable] = xhr.responseText.replace(/@font-face{[^}]+}/, '') resolve() } } xhr.open('GET', url) xhr.send() }) }, //將傳入的24進(jìn)制顏色標(biāo)號(hào)進(jìn)行處理, getThemeCluster(theme) { const tintColor = (color, tint) => { let red = parseInt(color.slice(0, 2), 16) let green = parseInt(color.slice(2, 4), 16) let blue = parseInt(color.slice(4, 6), 16) if (tint === 0) { // when primary color is in its rgb space return [red, green, blue].join(',') } else { red += Math.round(tint * (255 - red)) green += Math.round(tint * (255 - green)) blue += Math.round(tint * (255 - blue)) red = red.toString(16) green = green.toString(16) blue = blue.toString(16) return `#${red}${green}${blue}` } } const shadeColor = (color, shade) => { let red = parseInt(color.slice(0, 2), 16) let green = parseInt(color.slice(2, 4), 16) let blue = parseInt(color.slice(4, 6), 16) red = Math.round((1 - shade) * red) green = Math.round((1 - shade) * green) blue = Math.round((1 - shade) * blue) red = red.toString(16) green = green.toString(16) blue = blue.toString(16) return `#${red}${green}${blue}` } const clusters = [theme] for (let i = 0; i <= 9; i++) { clusters.push(tintColor(theme, Number((i / 10).toFixed(2)))) } clusters.push(shadeColor(theme, 0.1)) return clusters } } } </script> <style> .theme-message, .theme-picker-dropdown { z-index: 99999 !important; } .theme-picker .el-color-picker__trigger { height: 26px !important; width: 26px !important; padding: 2px; } .theme-picker-dropdown .el-color-dropdown__link-btn { display: none; } </style>
效果:
但是到現(xiàn)在有個(gè)問題,就是element-ui有自己的ui主題,每次radio切換主題時(shí)沒問題,但是F5刷新后頁面元素顏色會(huì)閃爍,順序:element-ui顏色>當(dāng)前設(shè)置緩存顏色,為了解決這個(gè)問題,就優(yōu)化了代碼,在APP.vue中設(shè)置,當(dāng)頁面刷新時(shí)能更快的渲染
1.新建colorpicker.js文件
2.APP.vue中引入
//colorpicker.js中只保留了 colorpicker.vue 中 methods:中的方法 import colorpicker from '@/mixins/colorpicker.js'
3.使用mixins模式
mixins:[colorpicker],
在created中使用
async created() { await this.getColor('#409EFF') await this.configRouter(); }, //將colorpicker.vue中此方法拿出來 async getColor(val){ let theme = val const oldVal = this.chalk ? theme : ORIGINAL_THEME if (typeof val !== 'string') return const themeCluster = this.getThemeCluster(val.replace('#', '')) const originalCluster = this.getThemeCluster(oldVal.replace('#', '')) const $message = this.$message({ message: ' Compiling the theme', customClass: 'theme-message', type: 'success', duration: 0, iconClass: 'el-icon-loading' }) const getHandler = (variable, id) => { return () => { const originalCluster = this.getThemeCluster(ORIGINAL_THEME.replace('#', '')) const newStyle = this.updateStyle(this[variable], originalCluster, themeCluster) let styleTag = document.getElementById(id) if (!styleTag) { styleTag = document.createElement('style') styleTag.setAttribute('id', id) document.head.appendChild(styleTag) } styleTag.innerText = newStyle } } if (!this.chalk) { const url = `https://unpkg.com/element-ui@${version}/lib/theme-chalk/index.css` await this.getCSSString(url, 'chalk') } const chalkHandler = getHandler('chalk', 'chalk-style') chalkHandler() const styles = [].slice.call(document.querySelectorAll('style')) .filter(style => { const text = style.innerText return new RegExp(oldVal, 'i').test(text) && !/Chalk Variables/.test(text) }) styles.forEach(style => { const { innerText } = style if (typeof innerText !== 'string') return style.innerText = this.updateStyle(innerText, originalCluster, themeCluster) }) this.$emit('change', val) $message.close() },
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