jq中的ajax示例代码

                $.ajax({
                    url: 'time.php',
                    type: 'get',
                    beforeSend: function (xhr) {
                        // 在所有发送请求的操作（open, send）之前执行
                        console.log('beforeSend', xhr)
                    },
                    success: function (res) {
                        // 隐藏 loading
                        // 只有请求成功（状态码为200）才会执行这个函数
                        console.log(res)
                    },
                    error: function (xhr) {
                        // 隐藏 loading
                        // 只有请求不正常（状态码不为200）才会执行
                        console.log('error', xhr)
                    },
                    complete: function (xhr) {
                        // 不管是成功还是失败都是完成，都会执行这个 complete 函数
                        console.log('complete', xhr)
                    }
                })