shop-uniapp/core/mixins/app.js

  import { computed } from 'vue'
  import { useStore, mapGetters } from 'vuex'
  import store from '@/store/index'
  import platform from '@/core/platform'

  // 字符串驼峰转中划线
  const formatToLine = value => {
    return value.replace(/([A-Z])/g, '-$1').toLowerCase()
  }

  // 主题样式 (因小程序端不支持styleObject语法，所以需要转换成字符串)
  const appTheme2Str = appTheme => {
    let str = ''
    for (const index in appTheme) {
      const name = formatToLine(index)
      str += `--${name}:${appTheme[index]};`
    }
    return str
  }

  export default {
    data() {
      return {
        platform
      }
    },
    computed: {
      appTheme: () => store.getters.appTheme,
      appThemeStyle: () => appTheme2Str(store.getters.appTheme)
    }
  }