您好,登錄后才能下訂單哦!
這篇文章主要講解了“怎么用vue+element實現(xiàn)后臺管理項目動態(tài)換膚的功能”,文中的講解內(nèi)容簡單清晰,易于學習與理解,下面請大家跟著小編的思路慢慢深入,一起來研究和學習“怎么用vue+element實現(xiàn)后臺管理項目動態(tài)換膚的功能”吧!
有時候一個項目的主題并不能滿足所有人的審美,這時候換膚功能就很友好,本項目基于vue+element實現(xiàn)后臺管理項目的換膚功能
1.創(chuàng)建換膚組件
<template> <el-color-picker class="theme-picker" popper-class="theme-picker-dropdown" v-model="theme" :predefine="predefineColors" ></el-color-picker> </template> <script> const version = require("element-ui/package.json").version; // element-ui version from node_modules const ORIGINAL_THEME = "#409EFF"; // default color export default { name: "ThemePicker", props: { default: { // 初始化主題,可由外部傳入 type: String // default: '#2668b1' // default: `${localStorage.getItem("tremePackers")==null?"#C60404":localStorage.getItem("tremePackers")}` } // size: { // 初始化主題,可由外部傳入 // type: String, // default: 'small' // }, }, data() { return { chalk: "", // content of theme-chalk css theme: ORIGINAL_THEME, showSuccess: true, // 是否彈出換膚成功消息 predefineColors: [ "#2668b1", "#52b493", "#429798", "#32789c", "#1944a5", "#5944bc", "#995dcd", "#ce7e5b", "#ee8b9b", "#283551" ] }; }, mounted() { this.theme = this.defaultTheme; // this.$emit('onThemeChange', this.theme) this.showSuccess = true; }, computed: { defaultTheme() { return this.$store.state.theme; } }, watch: { async theme(val, oldVal) { if (typeof val !== "string") return; const themeCluster = this.getThemeCluster(val.replace("#", "")); const originalCluster = this.getThemeCluster(oldVal.replace("#", "")); const getHandler = (variable, id) => { return () => { const originalCluster = this.getThemeCluster( ORIGINAL_THEME.replace("#", "") ); const newStyle = this.updateStyle( this[variable], originalCluster, themeCluster ); let styleTag = document.getElementById(id); if (!styleTag) { styleTag = document.createElement("style"); styleTag.setAttribute("id", id); // document.head.appendChild(styleTag) document .getElementsByTagName("style")[0] .insertBefore(styleTag, null); } styleTag.innerText = newStyle; }; }; const chalkHandler = getHandler("chalk", "chalk-style"); if (!this.chalk) { const url = `../../assets/style/theme/index.css`;//本地css樣式地址 // const url = `./dist/index.css`;//項目打包后css地址(原文件放入public文件夾中) // const url = `https://unpkg.com/element-ui@${version}/lib/theme-chalk/index.css`;//如果是公司內(nèi)網(wǎng),此網(wǎng)址則不適用 this.getCSSString(url, chalkHandler, "chalk"); } else { 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.$store.commit("themColor", val);//將更換的顏色存入store this.$emit("onThemeChange", val); // 響應(yīng)外部操作 //存入localStorage // localStorage.setItem('tremePackers',val); // if(this.showSuccess) { // this.$message({ // message: '換膚成功', // type: 'success' // }) // } else { // this.showSuccess = true // } } }, methods: { updateStyle(style, oldCluster, newCluster) { let newStyle = style; oldCluster.forEach((color, index) => { newStyle = newStyle.replace(new RegExp(color, "ig"), newCluster[index]); }); return newStyle; }, getCSSString(url, callback, variable) { const xhr = new XMLHttpRequest(); xhr.onreadystatechange = () => { if (xhr.readyState === 4 && xhr.status === 200) { this[variable] = xhr.responseText.replace(/@font-face{[^}]+}/, ""); callback(); } }; xhr.open("GET", url); xhr.send(); }, getThemeCluster(theme) { const tintColor = (color, tint) => { let red = parseInt(color.slice(0, 2), 16); let green = parseInt(color.slice(2, 4), 16); let blue = parseInt(color.slice(4, 6), 16); if (tint === 0) { // when primary color is in its rgb space return [red, green, blue].join(","); } else { red += Math.round(tint * (255 - red)); green += Math.round(tint * (255 - green)); blue += Math.round(tint * (255 - blue)); red = red.toString(16); green = green.toString(16); blue = blue.toString(16); return `#${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-picker .el-color-picker__trigger { vertical-align: middle; } .theme-picker-dropdown .el-color-dropdown__link-btn { display: none; } .el-color-picker--small .el-color-picker__trigger { border: none; } </style>
上面這塊代碼值得注意,紅框里的代碼是在head里所有節(jié)點后插入一個新的style標簽,打包后優(yōu)先級較高,但有個問題,有些地方的顏色直接消失變成空白影響了樣式,于是改成綠框里的代碼,但綠框里的代碼打包后優(yōu)先級會低于原來樣式顏色的而優(yōu)先級,所以需要根據(jù)項目調(diào)樣式優(yōu)先級
這塊的代碼也需要注意,如果公司直接使用的外網(wǎng)那么直接使用第三個url就行,如果公司使用的內(nèi)網(wǎng)訪問不了外部網(wǎng)頁那么可以通過第三條url下載項目對應(yīng)element版本的css樣式,把css文件放到項目里,但要注意放到不會被編譯的問價夾里,我項目用的是vue cli4,所以我動態(tài)轉(zhuǎn)換的css文件放在public文件夾里,放到assets問價夾中樣式文件會被編譯,因而路徑會報404,并且這塊使用的url是文件打包編譯后樣式的路徑,這是值得注意的地方
2.如果項目中有的樣式顏色沒有用到element,可以把顏色緩存到vuex里,然后在具體逐漸里通過計算屬性獲取再在樣式上動態(tài)綁定
vuex:
使用的組件中:
感謝各位的閱讀,以上就是“怎么用vue+element實現(xiàn)后臺管理項目動態(tài)換膚的功能”的內(nèi)容了,經(jīng)過本文的學習后,相信大家對怎么用vue+element實現(xiàn)后臺管理項目動態(tài)換膚的功能這一問題有了更深刻的體會,具體使用情況還需要大家實踐驗證。這里是億速云,小編將為大家推送更多相關(guān)知識點的文章,歡迎關(guān)注!
免責聲明:本站發(fā)布的內(nèi)容(圖片、視頻和文字)以原創(chuàng)、轉(zhuǎn)載和分享為主,文章觀點不代表本網(wǎng)站立場,如果涉及侵權(quán)請聯(lián)系站長郵箱:is@yisu.com進行舉報,并提供相關(guān)證據(jù),一經(jīng)查實,將立刻刪除涉嫌侵權(quán)內(nèi)容。