pc端网页，移动端网页（andorid、ios）离开页面做一个时间存储

 window.addEventListener(‘pagehide‘, function () {
    
  
 
  //  localStorage.setItem("selftestid",selftestid);
   // localStorage.setItem("remainderlength",remainderlength);
    console.log(selftestid)
    console.log(remainderlength)

    $.ajax({
      type: ‘post‘,
      url: "...",
      type: ‘post‘,
      async: false,
      data: {
        key: key,
        id: selftestid,
        remainderlength: remainderlength//时间存储后台
      },
      dataType: ‘json‘,
      success: function(result) {
        console.log(result);
      }
    })
  // }
});