Vue + Element UI 實現權限管理系統(更換皮膚主題)

自定義主題

命令行主題工具

1.安裝主題工具

首先安裝「主題生成工具」,能夠全局安裝或者安裝在當前項目下,推薦安裝在項目裏,方便別人 clone 項目時能直接安裝依賴並啓動。css

yarn add element-theme --dev

2.安裝chalk主題

安裝白堊主題,能夠從 npm 安裝或者從 GitHub 拉取最新代碼,這裏從 npm 安裝。vue

yarn add element-theme-chalk -D

3.初始化變量文件 

主題生成工具安裝成功後,若是全局安裝能夠在命令行裏經過 et 調用工具,若是安裝在當前目錄下,須要經過 node_modules/.bin/et 訪問到命令。執行 -i 初始化變量文件。默認輸出到 element-variables.scss,固然你能夠傳參數指定文件輸出目錄。node

node_modules/.bin/et -i

執行命令npm

命令執行成功以後,會在根目錄生成 scss文件 element-variables.scss 。element-ui

 

四、修改主題色 

在 element-variables.scss 文件裏修改 $–color-primary:#4b5f6e,即你想要的主題顏色json

五、編譯主題 

執行主題編譯命令生成主題,根目錄會生成一個theme的文件夾 。app

node_modules/.bin/et

六、引入自定義主題 

把生成的主題按顏色更名放置 src/theme 目錄下。工具

在 main.js 中 import ‘所在路徑/index.css’。測試

七、效果展現

從新加載後,咱們看到按鈕顏色已經不是默認的藍色了。ui

 

動態換膚器方式

1. 在下圖位置添加封裝的換膚組件。

index.vue

複製代碼
<template>
  <el-color-picker
    class="theme-picker"
    popper-class="theme-picker-dropdown"
    v-model="theme"></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 {
  data() {
    return {
      chalk: '', // content of theme-chalk css
      theme: ORIGINAL_THEME
    }
  },
  watch: {
    theme(val, oldVal) {
      if (typeof val !== 'string') return
      const themeCluster = this.getThemeCluster(val.replace('#', ''))
      const originalCluster = this.getThemeCluster(oldVal.replace('#', ''))
      console.log(themeCluster, originalCluster)
      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
        }
      }

      const chalkHandler = getHandler('chalk', 'chalk-style')

      if (!this.chalk) {
        const url = `https://unpkg.com/element-ui@${version}/lib/theme-chalk/index.css`
        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.$message({
        message: '換膚成功',
        type: 'success'
      })
    }
  },

  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;
}
</style>
複製代碼

 2.直接在組件中引用

 在 Home.vue 中引入

在語言切換左邊添加換膚組件

 3.換膚測試

點擊組件,選擇一個顏色肯定

咱們看到相關主題顏色即刻生效

退回登陸界面查看

 

相關文章
相關標籤/搜索