vue gets the date of the first and last day of the month to which the current date belongs

learning target:

学习目标

- [ ] vue gets the date of the first and last day of the month to which the current date belongs

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Learning Content:

学习内容如下所示：

1. Use JavaScript’s Date object to get the first and last days of the month to which the current date belongs.

// 获取当前日期
const today = new Date();

// 获取当前月份的第一天
const firstDayOfMonth = new Date(today.getFullYear(), today.getMonth(), 1);

// 获取下个月的第一天
const nextMonth = today.getMonth() === 11 ? 0 : today.getMonth() + 1;
const firstDayOfNextMonth = new Date(today.getFullYear(), nextMonth, 1);

// 获取当前月份的最后一天
const lastDayOfMonth = new Date(today.getFullYear(), today.getMonth() + 1, 0);

// 获取上个月的最后一天
const lastDayOfLastMonth = new Date(today.getFullYear(), today.getMonth(), 0);

console.log(firstDayOfMonth);
console.log(lastDayOfMonth);
console.log(firstDayOfNextMonth);
console.log(lastDayOfLastMonth);

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Knowledge summary:

提示：这里统计学习计划的总量

Summarize:

• 1. Get the current date
  new Date()
• 2. Get the first day of the current month
  new Date(today.getFullYear(), today.getMonth(), 1)
• 3. The last day of the current month
  new Date(today.getFullYear(), today.getMonth() + 1, 0)