问JS -如何实现YTD (年初至今)逻辑以便进行日期选择

EN

DateSelect(event) {
  const period = event.target.value
  let minValue = new Date(Math.max(...this.date) * 1000)
  const axisXMin = new Date(Math.min(...this.date) * 1000)

  switch (period) {
  case '1m':
    minValue.setMonth(minValue.getMonth() - 1)
    break
  case '3m':
    minValue.setMonth(minValue.getMonth() - 3)
    break
  case 'ytd':
    minValue.setFullYear(minValue.getFullYear() - minValue.getMonth())  //Here I want to implement the YTD Logic.
    break
  default:
    minValue = axisXMin
  }
  const data = this.data.filter(el => {
    return el.x >= minValue
  })
  this.GraphOutput(data) // this is vue-chartjs function.
}