希望它能起作用

<FullCalendar
    datesSet={(arg) => {
      console.log(arg.start) //starting visible date
      console.log(arg.end) //ending visible date
    }}
  />

你可以使用datesRender属性来得到活动月份的范围。

<FullCalendar
    datesRender={(arg) => {
      console.log(arg.view.activeStart) //starting visible date
      console.log(arg.view.activeEnd) //ending visible date
    }}
  />

获取当前月份，其中一月= 1，十二月= 12

const getCurrentMonth = (arg)  => {
    const startDate = arg.view.activeStart
    startDate.setDate(startDate.getDate() + 8)
    console.log('Current Month', startDate.getMonth() + 1 )
}

<FullCalendar
    datesRender={(arg) => getCurrentMonth(arg)}
/>