invoice_fill_h5/src/utils/wx.js

/**
 * 获取 code
 * @returns 
 */
 export function getCode () {
  const matched = /[?&]*code=([^&]+)/.exec(location.search)
  if (matched) {
    return decodeURIComponent(matched[1])
  }
}

/**
 * 跳转授权页面
 */
export function getRedirectURL (force, code) {
  if (import.meta.env.DEV) return;

  const originCode = localStorage.getItem('wxcode');
  const wxfirst = localStorage.getItem('wxfirst') === null;

  localStorage.setItem('wxcode', code)
  localStorage.setItem('wxfirst', 'not');

  if (force || wxfirst || !code || code === originCode) {
    const origin = location.origin + location.pathname
    const searchStr = location.search.replace(/code\=[^&]+/, '').replace(/state\=[^&]+/, '').replace(/^&+/, '').replace(/\?+$/, '')
    const local = encodeURIComponent(origin + searchStr + location.hash)
    return `https://open.weixin.qq.com/connect/oauth2/authorize?appid=wxd3bab568bc42d1de&redirect_uri=${local}&response_type=code&scope=snsapi_base&state=123#wechat_redirect`
  }
}