直接上干货，如有不懂欢迎留言，如有错误，欢迎指出

vue组件

<script>
  import {authPageBaseUri, homePage, wechatAppId} from 'config'
  import {extractQueryParams} from 'utils'
  export default {
    name: 'home',
    data () {
      return {
        config: {
          appid: wechatAppId,
          responseType: 'code',
          scope: 'snsapi_base',
          state: ''
        }
      }
    },
    created(){
      this.getAuthCode()
    },
    methods: {
      async getAuthCode(){
        await this.redirectToAuthPageUrl()
        let queryParams = extractQueryParams(window.location.href)
        let code = queryParams.code
        let callbackUrl = queryParams.callbackUrl
        if (code) {
          window.location.href = homePage + 'service_list?code=' + code
        }
      },
      redirectToAuthPageUrl(){
        let authParams = `?appid=${this.config.appid}&redirect_uri=${homePage}&response_type=${this.config.responseType}&state=${this.config.state}&scope=${this.config.scope}#wechat_redirect`
        window.location.href = authPageBaseUri + authParams
      },
    }
  }
</script>

<style scoped>

</style>

config文件

export const homePage = `http://tst.service.com/#/`
export const authPageBaseUri = 'https://open.weixin.qq.com/connect/oauth2/authorize'
export const wechatAppId = 'ww17cf217249330864'

utils文件

export function extractQueryParams (url) {
  let queryParams = {}
  if (url.includes('?')) {
    let queryString = url.substr(url.indexOf('?') + 1)
    let pairs = queryString.split('&')
    for(let pair of pairs) {
      let splitArray = pair.split('=')
      let key = splitArray[0]
      let value = splitArray[1]
      if (value.indexOf('#') > -1) {
        value = value.substring(0, value.indexOf('#'))
      }

      queryParams[key] = value
    }
  }
  return queryParams
}