Element UI - DatePicker 自定义日期选择期间

<el-date-picker
v-else
v-model="searchForm.data_Selected"
type="daterange"
unlink-panels
range-separator="～"
start-placeholder="開始期間"
end-placeholder="終了期間"
:picker-options="pickerOptions"
format="yyyy/MM/dd">
</el-date-picker>

data() {
return {
pickerOptions: {
shortcuts: [{
text: '今日',
onClick(picker) {
const end = new Date()
const start = new Date()
picker.$emit('pick', [start, end])
}
}, {
text: '昨日',
onClick(picker) {
const end = new Date()
const start = new Date()
start.setTime(start.getTime() - 3600 * 1000 * 24)
end.setTime(end.getTime() - 3600 * 1000 * 24)
picker.$emit('pick', [start, end])
}
}, {
text: '先週',
onClick(picker) {
var weekDate = new Date(new Date().getTime() - 7 * 24 * 3600 * 1000)
var weekDate2 = new Date(new Date().getTime() - 7 * 24 * 3600 * 1000)
var day = weekDate.getDay()
var time = weekDate.getDate() - day + (day === 0 ? - 6 : 1)
var startDate = new Date(weekDate.setDate(time))
var start = startDate.getFullYear() + '-' + (startDate.getMonth() +1 ) + '-' + startDate.getDate()
var endDate = new Date(weekDate2.setDate(time + 6))
var end = endDate.getFullYear() + '-' + ( endDate.getMonth() + 1) + '-' + endDate.getDate()
picker.$emit('pick', [start, end])
}
}, {
text: '先月',
onClick(picker) {
var year = new Date().getFullYear()
var month = new Date().getMonth()
if (month === 0) {
month = 12
year = year - 1
} else if (month < 10) {
month = '0' + month
}
var monthDate = new Date(year, month, 0)
var start = year + '-' + month + '-01'
var end = year + '-' + month + '-' + monthDate.getDate()
picker.$emit('pick', [start, end])
}
}, {
text: '今月',
onClick(picker) {
var year = new Date().getFullYear()
var month = new Date().getMonth() + 1
const start = year + '-' + month + '-01'
const end = new Date()
picker.$emit('pick', [start, end])
}
}]
},
searchForm: {
data_Selected: ''
}
}
}