JS 获取 URL 参数

  <script>
    function getQeuryVariable(variable) {
      let query = window.location.search.substring(1)
      console.log(query)
      let vars = query.split('&')
      for (let i = 0; i < vars.length; i++) {
        let pair = vars[i].split('=')
        console.log(pair)
        if (pair[0] === variable) {
          return pair[1]
        }
      }
      return false
    }
    let userName = getQeuryVariable('userName')
    console.log(userName)
  </script>