diff --git a/src/composables/useRouteFilter.ts b/src/composables/useRouteFilter.ts
new file mode 100644
index 000000000..a9daf1c5f
--- /dev/null
+++ b/src/composables/useRouteFilter.ts
@@ -0,0 +1,43 @@
+import {reactive, watch, type Ref} from 'vue'
+import {useRouter, type RouteLocationNormalized, type RouteLocationRaw} from 'vue-router'
+import cloneDeep from 'lodash.clonedeep'
+
+export type Filter = Record<string, any>
+
+export function useRouteFilter<F extends Filter = Filter>(
+		route: Ref<RouteLocationNormalized>,
+		routeToFilter: (route: RouteLocationNormalized) => F,
+		filterToRoute: (filter: F) => RouteLocationRaw,
+	) {
+	const router = useRouter()
+
+	const filters: F = reactive(routeToFilter(route.value))
+
+  watch(() => cloneDeep(route.value), (route, oldRoute) => {
+    if (route.name !== oldRoute.name) {
+      return
+    }
+    const filterFullPath = router.resolve(filterToRoute(filters)).fullPath
+    if (filterFullPath === route.fullPath) {
+      return
+    }
+  
+    Object.assign(filters, routeToFilter(route))
+  })
+
+  watch(
+    filters,
+    async () => {
+      const newRouteFullPath = router.resolve(filterToRoute(filters)).fullPath
+      if (newRouteFullPath !== route.value.fullPath) {
+        await router.push(newRouteFullPath)
+      }
+    },
+    // only apply new route after all filters have changed in component cycle
+    {flush: 'post'},
+  )
+
+  return {
+    filters,
+  }
+}
\ No newline at end of file
diff --git a/src/helpers/time/parseBooleanProp.ts b/src/helpers/time/parseBooleanProp.ts
new file mode 100644
index 000000000..1407fe4e1
--- /dev/null
+++ b/src/helpers/time/parseBooleanProp.ts
@@ -0,0 +1,5 @@
+export function parseBooleanProp(booleanProp: string) {
+	return (booleanProp === 'false' || booleanProp === '0')
+		? false
+		:	Boolean(booleanProp)
+}
\ No newline at end of file
diff --git a/src/helpers/time/parseDateProp.ts b/src/helpers/time/parseDateProp.ts
new file mode 100644
index 000000000..4ee954f16
--- /dev/null
+++ b/src/helpers/time/parseDateProp.ts
@@ -0,0 +1,30 @@
+import type {DateISO} from "@/types/DateISO"
+import type {DateKebab} from "@/types/DateKebab"
+
+export function parseDateProp(kebabDate: DateKebab | undefined): string | undefined {
+	try {
+
+		if (!kebabDate) {
+			throw new Error('No value')
+		}
+		const dateValues = kebabDate.split('-')
+		const [, monthString, dateString] = dateValues
+		const [year, month, date] = dateValues.map(val => Number(val))
+		const dateValuesAreValid = (
+			!Number.isNaN(year) &&
+			monthString.length >= 1 && monthString.length <= 2 &&
+			!Number.isNaN(month) &&
+			month >= 1 && month <= 12 &&
+			dateString.length >= 1 && dateString.length <= 31 &&
+			!Number.isNaN(date) &&
+			date >= 1 && date <= 31
+		)
+		if (!dateValuesAreValid) {
+			throw new Error('Invalid date values')
+		}
+		return new Date(year, month, date).toISOString() as DateISO
+	} catch(e) {
+		// ignore nonsense route queries
+		return
+	}
+}
\ No newline at end of file
diff --git a/src/types/DateISO.ts b/src/types/DateISO.ts
index 77c1759b4..0db782318 100644
--- a/src/types/DateISO.ts
+++ b/src/types/DateISO.ts
@@ -2,6 +2,6 @@
  * Returns a date as a string value in ISO format.
  * same format as `new Date().toISOString()`
  */
-export type DateISO = string
+export type DateISO<T extends string = string> = T
 
 new Date().toISOString()
\ No newline at end of file
diff --git a/src/views/list/ListGantt.vue b/src/views/list/ListGantt.vue
index 06913b97d..a7bd1fe44 100644
--- a/src/views/list/ListGantt.vue
+++ b/src/views/list/ListGantt.vue
@@ -39,12 +39,11 @@
 </template>
 
 <script setup lang="ts">
-import {computed, reactive, ref, watch} from 'vue'
+import {computed, ref, toRefs} from 'vue'
 import Foo from '@/components/misc/flatpickr/Flatpickr.vue'
 import type Flatpickr from 'flatpickr'
 import {useI18n} from 'vue-i18n'
-import {useRoute, useRouter, type RouteLocationNormalized, type RouteLocationRaw} from 'vue-router'
-import cloneDeep from 'lodash.clonedeep'
+import type {RouteLocationNormalized} from 'vue-router'
 
 import {useAuthStore} from '@/stores/auth'
 
@@ -52,19 +51,7 @@ import ListWrapper from './ListWrapper.vue'
 import Fancycheckbox from '@/components/input/fancycheckbox.vue'
 
 import {createAsyncComponent} from '@/helpers/createAsyncComponent'
-import {isoToKebabDate} from '@/helpers/time/isoToKebabDate'
-
-import type {IList} from '@/modelTypes/IList'
-import type {DateISO} from '@/types/DateISO'
-import type {DateKebab} from '@/types/DateKebab'
-
-// convenient internal filter object
-export interface GanttFilter {
-	listId: IList['id']
-	dateFrom: DateISO
-	dateTo: DateISO
-	showTasksWithoutDates: boolean
-}
+import {useGanttFilter} from './helpers/useGanttFilter'
 
 type Options = Flatpickr.Options.Options
 
@@ -72,115 +59,8 @@ const GanttChart = createAsyncComponent(() => import('@/components/tasks/gantt-c
 
 const props = defineProps<{route: RouteLocationNormalized}>()
 
-const router = useRouter()
-const route = useRoute()
-
-function parseDateProp(kebabDate: DateKebab | undefined): string | undefined {
-	try {
-
-		if (!kebabDate) {
-			throw new Error('No value')
-		}
-		const dateValues = kebabDate.split('-')
-		const [, monthString, dateString] = dateValues
-		const [year, month, date] = dateValues.map(val => Number(val))
-		const dateValuesAreValid = (
-			!Number.isNaN(year) &&
-			monthString.length >= 1 && monthString.length <= 2 &&
-			!Number.isNaN(month) &&
-			month >= 1 && month <= 12 &&
-			dateString.length >= 1 && dateString.length <= 31 &&
-			!Number.isNaN(date) &&
-			date >= 1 && date <= 31
-		)
-		if (!dateValuesAreValid) {
-			throw new Error('Invalid date values')
-		}
-		return new Date(year, month, date).toISOString()
-	} catch(e) {
-		// ignore nonsense route queries
-		return
-	}
-}
-
-function parseBooleanProp(booleanProp: string) {
-	return (booleanProp === 'false' || booleanProp === '0')
-		? false
-		:	Boolean(booleanProp)
-}
-
-const DEFAULT_SHOW_TASKS_WITHOUT_DATES = false
-
-const DEFAULT_DATEFROM_DAY_OFFSET = -15
-const DEFAULT_DATETO_DAY_OFFSET = +55
-
-const now = new Date()
-
-function getDefaultDateFrom() {
-	return new Date(now.getFullYear(), now.getMonth(), now.getDate() + DEFAULT_DATEFROM_DAY_OFFSET).toISOString()
-}
-
-function getDefaultDateTo() {
-	return new Date(now.getFullYear(), now.getMonth(), now.getDate() + DEFAULT_DATETO_DAY_OFFSET).toISOString()
-}
-
-function routeToFilter(route: RouteLocationNormalized): GanttFilter {
-	return {
-		listId: Number(route.params.listId as string),
-		dateFrom: parseDateProp(route.query.dateFrom as DateKebab) || getDefaultDateFrom(),
-		dateTo: parseDateProp(route.query.dateTo as DateKebab) || getDefaultDateTo(),
-		showTasksWithoutDates: parseBooleanProp(route.query.showTasksWithoutDates as string) || DEFAULT_SHOW_TASKS_WITHOUT_DATES,
-	}
-}
-
-function filterToRoute(filters: GanttFilter): RouteLocationRaw {
-	let query: Record<string, string> = {}
-	if (
-		filters.dateFrom !== getDefaultDateFrom() ||
-		filters.dateTo !== getDefaultDateTo()
-	) {
-		query = {
-			dateFrom: isoToKebabDate(filters.dateFrom),
-			dateTo: isoToKebabDate(filters.dateTo),
-		}
-	}
-
-	if (filters.showTasksWithoutDates) {
-		query.showTasksWithoutDates = String(filters.showTasksWithoutDates)
-	}
-
-	return {
-		name: 'list.gantt',
-		params: {listId: filters.listId},
-		query,
-	}
-}
-
-const filters: GanttFilter = reactive(routeToFilter(route))
-
-watch(() => cloneDeep(props.route), (route, oldRoute) => {
-	if (route.name !== oldRoute.name) {
-		return
-	}
-	const filterFullPath = router.resolve(filterToRoute(filters)).fullPath
-	if (filterFullPath === route.fullPath) {
-		return
-	}
-
-	Object.assign(filters, routeToFilter(route))
-})
-
-watch(
-	filters,
-	async () => {
-		const newRouteFullPath = router.resolve(filterToRoute(filters)).fullPath
-		if (newRouteFullPath !== route.fullPath) {
-			await router.push(newRouteFullPath)
-		}
-	},
-	// only apply new route after all filters have changed in component cycle
-	{flush: 'post'},
-)
+const {route} = toRefs(props)
+const {filters} = useGanttFilter(route)
 
 const flatPickerEl = ref<typeof Foo | null>(null)
 const flatPickerDateRange = computed<Date[]>({
diff --git a/src/views/list/helpers/useGanttFilter.ts b/src/views/list/helpers/useGanttFilter.ts
new file mode 100644
index 000000000..2b1f99dbf
--- /dev/null
+++ b/src/views/list/helpers/useGanttFilter.ts
@@ -0,0 +1,70 @@
+import type {Ref} from 'vue'
+import type {RouteLocationNormalized, RouteLocationRaw} from 'vue-router'
+
+import {isoToKebabDate} from '@/helpers/time/isoToKebabDate'
+import {parseDateProp} from '@/helpers/time/parseDateProp'
+import {parseBooleanProp} from '@/helpers/time/parseBooleanProp'
+import {useRouteFilter} from '@/composables/useRouteFilter'
+
+import type {IList} from '@/modelTypes/IList'
+import type {DateISO} from '@/types/DateISO'
+import type {DateKebab} from '@/types/DateKebab'
+
+// convenient internal filter object
+export interface GanttFilter {
+	listId: IList['id']
+	dateFrom: DateISO
+	dateTo: DateISO
+	showTasksWithoutDates: boolean
+}
+
+const DEFAULT_SHOW_TASKS_WITHOUT_DATES = false
+
+const DEFAULT_DATEFROM_DAY_OFFSET = -15
+const DEFAULT_DATETO_DAY_OFFSET = +55
+
+const now = new Date()
+
+function getDefaultDateFrom() {
+	return new Date(now.getFullYear(), now.getMonth(), now.getDate() + DEFAULT_DATEFROM_DAY_OFFSET).toISOString()
+}
+
+function getDefaultDateTo() {
+	return new Date(now.getFullYear(), now.getMonth(), now.getDate() + DEFAULT_DATETO_DAY_OFFSET).toISOString()
+}
+
+function routeToFilter(route: RouteLocationNormalized): GanttFilter {
+	return {
+		listId: Number(route.params.listId as string),
+		dateFrom: parseDateProp(route.query.dateFrom as DateKebab) || getDefaultDateFrom(),
+		dateTo: parseDateProp(route.query.dateTo as DateKebab) || getDefaultDateTo(),
+		showTasksWithoutDates: parseBooleanProp(route.query.showTasksWithoutDates as string) || DEFAULT_SHOW_TASKS_WITHOUT_DATES,
+	}
+}
+
+function filterToRoute(filters: GanttFilter): RouteLocationRaw {
+	let query: Record<string, string> = {}
+	if (
+		filters.dateFrom !== getDefaultDateFrom() ||
+		filters.dateTo !== getDefaultDateTo()
+	) {
+		query = {
+			dateFrom: isoToKebabDate(filters.dateFrom),
+			dateTo: isoToKebabDate(filters.dateTo),
+		}
+	}
+
+	if (filters.showTasksWithoutDates) {
+		query.showTasksWithoutDates = String(filters.showTasksWithoutDates)
+	}
+
+	return {
+		name: 'list.gantt',
+		params: {listId: filters.listId},
+		query,
+	}
+}
+
+export function useGanttFilter(route: Ref<RouteLocationNormalized>) {
+	return useRouteFilter<GanttFilter>(route, routeToFilter, filterToRoute)
+}
\ No newline at end of file