data dateTime to only date 绘制折线图

Question

我想绘制折线图，​​但我的日期从 sql-server 数据中获取值，包括时间 我怎样才能删除时间

            console.log(json);
            if (json.length > 0) {

                var datagraph = [];
                datagraph.push(['Date', 'Point']);
                for (i = 0; i < json.length; i++) {
                    var smalldata = [];
                    var date = json[i].Date;
                    var point = json[i].Point;
                    smalldata.push(date, point);
                    datagraph.push(smalldata);

                }                
            }

console.log(json) 这是结果

0: {DateTime: "2019-05-31T00:00:00", Point: 1}
length: 1
__proto__: Array(0)

Answer 1

使用函数'split'将字符串除以字符'T'

let parts = json[i].Date.split('T');
let date = parts[0];