style:element 换肤

 import dialogBox from '@/components/DialogBox/dialogBox.vue'
 import lbTable from '@/components/lb-table/lb-table.vue'
+import Theme from '@/components/Theme/theme.vue'
 export default {
   install: (Vue) => {
     Vue.component('dialogBox', dialogBox);
     Vue.component('lbTable', lbTable);
+    Vue.component('Theme', Theme);
   }
 }
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+<template>
+  <el-color-picker 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
+
+export default {
+  data () {
+    return {
+      chalk: '', // content of theme-chalk css
+      theme: ''
+    }
+  },
+  computed: {
+    defaultTheme () {
+      return this.$store.state.app.theme
+    }
+  },
+  watch: {
+    defaultTheme: {
+      handler: function (val, oldVal) {
+        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('#', ''))
+      console.log(themeCluster, originalCluster)
+
+      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)
+
+      $message.close()
+    }
+  },
+
+  methods: {
+    updateStyle (style, oldCluster, newCluster) {
+      let newStyle = style
+      oldCluster.forEach((color, index) => {
+        newStyle = newStyle.replace(new RegExp(color, 'ig'), newCluster[index])
+      })
+      return newStyle
+    },
+
+    getCSSString (url, variable) {
+      return new Promise(resolve => {
+        const xhr = new XMLHttpRequest()
+        xhr.onreadystatechange = () => {
+          if (xhr.readyState === 4 && xhr.status === 200) {
+            this[variable] = xhr.responseText.replace(/@font-face{[^}]+}/, '')
+            resolve()
+          }
+        }
+        xhr.open('GET', url)
+        xhr.send()
+      })
+    },
+
+    getThemeCluster (theme) {
+      const tintColor = (color, tint) => {
+        let red = parseInt(color.slice(0, 2), 16)
+        let green = parseInt(color.slice(2, 4), 16)
+        let blue = parseInt(color.slice(4, 6), 16)
+
+        if (tint === 0) { // when primary color is in its rgb space
+          return [red, green, blue].join(',')
+        } else {
+          red += Math.round(tint * (255 - red))
+          green += Math.round(tint * (255 - green))
+          blue += Math.round(tint * (255 - blue))
+
+          red = red.toString(16)
+          green = green.toString(16)
+          blue = blue.toString(16)
+
+          return `#${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}${blue}`
+      }
+
+      const clusters = [theme]
+      for (let i = 0; i <= 9; i++) {
+        clusters.push(tintColor(theme, Number((i / 10).toFixed(2))))
+      }
+      clusters.push(shadeColor(theme, 0.1))
+      return clusters
+    }
+  }
+}
+</script>
+
+<style>
+.theme-message,
+.theme-picker-dropdown {
+  z-index: 99999 !important;
+}
+
+.theme-picker .el-color-picker__trigger {
+  height: 26px !important;
+  width: 26px !important;
+  padding: 2px;
+}
+
+.theme-picker-dropdown .el-color-dropdown__link-btn {
+  display: none;
+}
+</style>
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@@ -3,7 +3,9 @@
     <div class="logo">
       <img v-if="logo" :src="logo" class="header-logo">
     </div>
-    <div class="backdrop"></div>
+    <div class="backdrop">
+      <theme style="float: right;height: 26px;width: 26px;margin-top: 26px;" @change="themeChange" />
+    </div>
     <div class="right-menu">
       <el-dropdown class="avatar-container right-menu-item hover-effect" @command="handleCommand">
         <div class="avatar-wrapper">
@@ -31,6 +33,9 @@ export default {
     }
   },
   methods: {
+    themeChange (val) {
+      this.$store.dispatch('app/updateTheme', val)
+    },
     searchMessageCenter () {
       this.$router.push({ name: 'messagecenter' })
     },

@@ -5,7 +5,7 @@ import App from './App'
 import 'normalize.css/normalize.css' // a modern alternative to CSS resets
 import Element from 'element-ui'
 import './styles/element-variables.scss'
-import '@/styles/index.scss' // global css
+import '@/styles/index.scss'
 import Base from './components/Base/base'
 
 import './image/icons' // icon

 import Cookies from 'js-cookie'
 
 const state = {
-    size: 'small'
+    size: 'small',
+    theme: '#409EFF'
 }
 
 const mutations = {
     SET_SIZE: (state, size) => {
         state.size = size
         Cookies.set('size', size)
-    }
+    },
+    UPDATE_THEME (state, val) {
+        state.theme = val;
+    },
 }
 
 const actions = {
-    closeSideBar ({ commit }, { withoutAnimation }) {
-        commit('CLOSE_SIDEBAR', withoutAnimation)
-    },
     setSize ({ commit }, size) {
         commit('SET_SIZE', size)
+    },
+    updateTheme ({ commit }, val) {
+        commit('UPDATE_THEME', val)
     }
 }
 

@@ -325,20 +325,4 @@ input[type="number"] {
 .el-date-editor.el-date-editor--daterange .el-icon-circle-close {
   position: absolute;
   right: 25px;
-}
-
-// 表格分页
-.el-pagination.is-background .btn-prev,
-.el-pagination.is-background .btn-next,
-.el-pagination.is-background .el-pager li,
-.el-pagination .el-select .el-input .el-input__inner {
-  background-color: #fff !important;
-  border: 1px solid #E4EBF4 !important;
-  border-radius: 5px !important;
-}
-
-.el-pagination.is-background .el-pager li.active {
-  background-color: #0F93F6 !important;
-  border: 1px solid #0F93F6 !important;
-  color: #fff !important;
 }
\ No newline at end of file