js new Date() 测试

var t =  new Date().toString(); //t =  "Thu Oct 31 2019 11:36:57 GMT+0800 (中国标准时间)"
 var t1 = new Date();
 var data_arry =[];
 var that = new Date();
 data_arry.push(that.constructor());  // Thu Oct 31 2019 11:50:26 GMT+0800 (中国标准时间)"
data_arry.push(that.getDate());  //31
data_arry.push(that.getDay());  // 4
data_arry.push(that.getFullYear()); //2019
data_arry.push(that.getHours());  // 11
data_arry.push(that.getMilliseconds()); // 401
data_arry.push(that.getMinutes()); // 50
data_arry.push(that.getMonth()); //9
data_arry.push(that.getSeconds()); //26
data_arry.push(that.getTime());  //1572493826401
data_arry.push(that.getTimezoneOffset());  //-480
data_arry.push(that.getUTCDate()); //31
data_arry.push(that.getUTCDay());
data_arry.push(that.getUTCFullYear());
data_arry.push(that.getUTCHours());
data_arry.push(that.getUTCMilliseconds());
data_arry.push(that.getUTCMinutes());
data_arry.push(that.getUTCMonth());
data_arry.push(that.getUTCSeconds());
data_arry.push(that.getYear());
data_arry.push(that.setDate());
data_arry.push(that.setFullYear());
data_arry.push(that.setHours());
data_arry.push(that.setMilliseconds());
data_arry.push(that.setMinutes());
data_arry.push(that.setMonth());
data_arry.push(that.setSeconds());
data_arry.push(that.setTime());
data_arry.push(that.setUTCDate());
data_arry.push(that.setUTCFullYear());
data_arry.push(that.setUTCHours());
data_arry.push(that.setUTCMilliseconds());
data_arry.push(that.setUTCMinutes());
data_arry.push(that.setUTCMonth());
data_arry.push(that.setUTCSeconds());
data_arry.push(that.setYear());
data_arry.push(that.toDateString());
data_arry.push(that.toGMTString());
//data_arry.push(that.toISOString()); 报错
data_arry.push(that.toJSON());
data_arry.push(that.toLocaleDateString());
data_arry.push(that.toLocaleString());
data_arry.push(that.toLocaleTimeString());
data_arry.push(that.toString());
data_arry.push(that.toTimeString());
data_arry.push(that.toUTCString());
data_arry.push(that.valueOf());

    function get_nowtime() {
            var date = new Date();
            return (date.getFullYear() + '-' + (date.getMonth() + 1) + '-' + date.getDate());
        }
        console.log(get_nowtime());

        function get_nowtime() {
            function format(str) {
                str += "";
                if (str.length < 2) {
                    str = "0" + str;
                }
                return str;
            }
            var date = new Date();
            return (date.getFullYear() + '-' + format((date.getMonth() + 1)) + '-' + format(date.getDate()));
        }

 js  时间字符串转时间

      layui.use('laydate', function () {
            var laydate = layui.laydate;
            laydate.render({
                elem: '#test1'
                 ,format: 'yyyy-MM-dd' //可任意组合,
                , value: new Date(document.getElementById('test1').value) //必须遵循format参数设定的格式
            });
        });