jquery的then方法

綠地項目中的代碼：

　　$.ajax({ url: `https://openapi.italent.cn/OAuth/Token`,
            type: 'post', data: `tenant_id=${tenantId}&grant_type=client_credentials&secret=${secret}&app_id=${appID}`, contentType: "application/x-www-form-urlencoded", success: function(data) { return data }, error(err) { console.log(err.responseText) } }).then(function(data) { var HR_token = data; $.ajax({ method: 'GET', url: `https://oapi.italent.cn/api/v1/${tenantId}/${ehrUserId}/todo?status=1&pageNum=1&pageSize=4`,
                dataType: 'json', contentType: "application/json", beforeSend: function(xhr) { xhr.setRequestHeader("Authorization", "Bearer " + HR_token.access_token); }, success: function(res) { sendListData(3, res.data.todos); }, error: function(err) { console.log(err); } }); })

以下是百度的用法：

 $.ajax({ url:"xxxxxx", method:"post", data:id, contentType:"application/json", }).then(function(res){ $.ajax({ url:"", method:"post", data:res.data.roleIds, contentType:"application/json", success:function( data ){ //渲染已選角色下拉框
 } }) })