js获取某年某月的星期六和星期日，返回日期集合

写陀螺匠日历配置,需要根据动态年份和月份获取当前月份的周六周天日期，具体方法在下面，有需要的可以看一下

 // 获取本月的休息时间（传入年和月）
    getWeeks(year, month) {
      let is_days = new Date(year, month, 0).getDate() // 当前月份多少天

      const date = new Date()
      const currentYear = year
      let currentMonth = month
      if (currentMonth < 10) currentMonth = '0' + currentMonth
      const firstDate = new Date(`${currentYear}-${currentMonth}-01`)
      const day = parseInt(firstDate.getDay() == 0 ? 7 : firstDate.getDay())
      const days = new Date(currentYear, currentMonth, 0).getDate()

      // 计算当月周数
      let weeks
      const temp = days % 7
      if (7 - day >= temp) {
        weeks = parseInt(days / 7) + 1
      } else {
        weeks = parseInt(days / 7) + 2
      }
      const lastDay = new Date(`${currentYear}-${currentMonth}-${days}`).getDay()
      if (lastDay === 0) {
        weeks--
      }

      // 提取本月的周六和周末
      let freeDays = []
      if (day <= 7) {
        freeDays.push(7 - day)
        freeDays.push(1 + (7 - day))
      }

      for (let i = 1, j = weeks; i < j; i++) {
        const last = freeDays[freeDays.length - 1]

        if (last + 6 <= is_days) {
          freeDays.push(last + 6)
        }
        if (last + 7 <= is_days) {
          freeDays.push(last + 7)
        }
      }
   
      if (freeDays[0] == 0) {
        freeDays.splice(0, 1)
      }

      let result = []
      freeDays.forEach((m) => {
        result.push(`${currentYear}-${currentMonth}-${m < 10 ? '0' + m : m}`)
      })

      return result
    }