js日期相減得到分鍾數

const date1 = new Date(fieldsValue.examStartTime);

const date2 = new Date(fieldsValue.examEndTime);

const s1 = date1.getTime();

const s2 = date2.getTime();

const Minute2 = Number((s2 - s1) / 60000);

const Minute1 = Number(fieldsValue.duration)