Question

对于日程安排应用程序，我需要按星期一开始的星期几显示星期几。到目前为止，我到了：

var options = {
  weekday: 'long',
  year: 'numeric',
  month: 'long',
  day: 'numeric'
};
const weekDays = [];

for (let index = 1; index < 7; index++) {
  weekDays.push(new Date(year, 0, index + (week - 1) * 7).toLocaleDateString('nl-NL', options));
}

此代码显示一周和一年给出的日期范围，但似乎无法使其在星期一开始。我有什么想法想念吗？

Answer 1

您假设每年的1月1日是星期一。这段代码自动查找每年的第一个星期一。

var year = 2016;
var week = 1;
var index = 1;
var options = {
  weekday: 'long',
  year: 'numeric',
  month: 'long',
  day: 'numeric'
};
var d = new Date(year, 0, index + (week - 1) * 7);
var weekday = d.getDay();
var diff = 1 - weekday;
if (diff < 0) {
  diff = diff + 7;
}
d.setDate(d.getDate() + diff);

console.log(d.toLocaleString(undefined, options));

从JavaScript开始，从星期一开始按星期数获取天数

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