某日之前不可選油啤，某日之后不可選，
<el-date-picker
type="date"
placeholder=""
v-model="ruleForm.admissionDate"
value-format="yyyy-MM-dd"
style="width: 100%;"
></el-date-picker>
el-date-picker
type="date"
placeholder=""
v-model="ruleForm.graduationDate"
value-format="yyyy-MM-dd"
style="width: 100%;"
:picker-options="pickerOptions"
></el-date-picker>
data()里定義
pickerOptions: {
disabledDate: (time) => {
let data = new Date(this.ruleForm.admissionDate)
let thatDay = data.getTime()
return time.getTime() < thatDay
}
}
