el-date-picker，日期时间范围选择器默认只能选择7天

 elementplus组件

<el-date-picker
	style="width: 100%"
	v-model="dayTime"
	type="datetimerange"
	:start-placeholder="$t('public.startTime')"
	:end-placeholder="$t('public.endTime')"
	@change="changeEndDate"
	@calendar-change="calendarChange"
	format="YYYY/MM/DD HH:mm:ss"
	:disabled-date="disabledDateOption"
	:clearable="false"
/>

dayTime：用户选择的时间范围数组

disableDate：根据选择的第一个时间点来判断用户选择的前后7天的时间结束点

const dayTime = ref<Array<string>>([]);
const disableDate = ref<string>("");

 calendarChange事件，用户选择完第二个时间值后把之前用来判断的disableDate置空

const calendarChange = (time: any[]) => {
	disableDate.value = time[0];
	if (time[1]) {
		disableDate.value = "";
	}
};

disabledDateOption：判断禁用的时间范围

const disabledDateOption = (time: any) => {
	if (disableDate.value) {
		disableDate.value = moment(new Date(disableDate.value)).format("YYYY-MM-DD HH:mm:ss");
		return (
			moment(time).isAfter(moment(disableDate.value).add(7, "days"), "days") ||
			moment(time).isBefore(moment(disableDate.value).subtract(7, "days"), "days") ||
			moment().isBefore(time, "days")
		);
	} else {
		return moment().isBefore(time, "days");
	}
};