子应用html引入本地js文件，文件中的全局变量is not defined

原因：子应用中var定义的变量不在是全局变量。
解决：

• 将变量挂在到window上，window.xxx = xxx
• 将js文件放到主应用
  

子应用项目点击后，再点击其它路由变404，刷新也是404

解决：主子应用的vue-router版本要一致

在子应用页面退出登录，重新登录后页面404

解决：先加载微应用，再生成主应用路由

修改主题颜色问题

原理：element-ui theme-picker组件修改主题色是将所有组件之前的色值全部换成新的，生成一个style文件，追加到head中
问题：若主子应用间开启了样式隔离，会把子应用所有样式前增加前缀div[data-qiankun=“”]
所以在同步修改子应用主题色的时候，要将生成的style文件所有选择器前加上此前缀，同时将style追加到< qiankun-head >中

主应用修改主题色

子应用接收传值

在app.vue中监听theme值变化

子应用theme-picker代码

<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.settings.theme
    }
  },
  watch: {
    defaultTheme: {
      handler: function(val, oldVal) {
        this.theme = val
      },
      immediate: true
    },
    async theme(val) {
      await this.setTheme(val)
    }
  },
  created() {
    if(this.defaultTheme !== ORIGINAL_THEME) {
      this.setTheme(this.defaultTheme)
    }
  },

  methods: {
    async setTheme(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 getHandler = (variable, id) => {
        return () => {
          const originalCluster = this.getThemeCluster(ORIGINAL_THEME.replace('#', ''))
          var newStyle = this.updateStyle(this[variable], originalCluster, themeCluster)
          let styleTag = document.getElementById(id)
          if (!styleTag) {
            styleTag = document.createElement('style')
            styleTag.setAttribute('id', id)
            // qiankun环境修改主题色
            console.log(window.__POWERED_BY_QIANKUN__)
            if(window.__POWERED_BY_QIANKUN__){
              document.getElementsByTagName('qiankun-head')[0].appendChild(styleTag)
            }else{
              document.head.appendChild(styleTag)
            }
          }
          if(window.__POWERED_BY_QIANKUN__){
            // 获取qiankun的名字name值
            let name = document.querySelectorAll("[id^='__qiankun_microapp_wrapper_for']")[0].dataset.name 
            newStyle = this.prefixCssSelectors(newStyle,'div[data-qiankun="'+name+'"]')
          }
          styleTag.innerText = newStyle
        }
      }

      if (!this.chalk) {
        const url = `https://unpkg.com/element-ui@${version}/lib/theme-chalk/index.css`
        await this.getCSSString(url, 'chalk')
      }
     
      if(window.__POWERED_BY_QIANKUN__){
       var chalkHandler = getHandler('chalk', 'chalk-style-qiankun')
      }else{
        var 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)
    },

    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
    },
    // 给子应用加上样式前缀
    prefixCssSelectors(rules, className) {
      var classLen = className.length,
        char, nextChar, isAt, isIn;
      // makes sure the className will not concatenate the selector
      className += ' ';
      // removes comments
      rules = rules.replace( /\/\*(?:(?!\*\/)[\s\S])*\*\/|[\r\n\t]+/g, '' );
      // makes sure nextChar will not target a space
      rules = rules.replace( /}(\s*)@/g, '}@' );
      rules = rules.replace( /}(\s*)}/g, '}}' );
      for (var i = 0; i < rules.length-2; i++) {
        char = rules[i];
        nextChar = rules[i+1];
        if (char === '@' && nextChar !== 'f') isAt = true;
        if (!isAt && char === '{') isIn = true;
        if (isIn && char === '}') isIn = false;
        if (
          !isIn &&
          nextChar !== '@' &&
          nextChar !== '}' &&
          (
            char === '}' ||
            char === ',' ||
            ((char === '{' || char === ';') && isAt)
          )
        ) {
          rules = rules.slice(0, i+1) + className + rules.slice(i+1);
          i += classLen;
          isAt = false;
        }
      };
      // prefix the first select if it is not `@media` and if it is not yet prefixed
      if (rules.indexOf(className) !== 0 && rules.indexOf('@') !== 0) rules = className+rules;
      return rules;
    }
  }
}
</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>

主应用刷新主题色恢复问题，app.vue引入theme-picker区间隐藏，刷新会默认执行修改组件颜色事件