Open filters on page load

app/assets/javascripts/components/option-select.js

@@ -15,6 +15,10 @@ window.GOVUK.Modules = window.GOVUK.Modules || {};
     this.hasFilter = this.$optionSelect.getAttribute('data-filter-element') || ''
 
     this.checkedCheckboxes = []
+
+    this.mq = window.matchMedia('(min-width: 641px)')
+    this.isClosedOnLoad = this.$optionSelect.getAttribute('data-closed-on-load')
+    this.isClosedOnLoadMobile = this.$optionSelect.getAttribute('data-closed-on-load-mobile')
   }
 
   OptionSelect.prototype.init = function () {
@@ -57,25 +61,13 @@ window.GOVUK.Modules = window.GOVUK.Modules || {};
     var button = this.$optionSelect.querySelector('.js-container-button')
     button.addEventListener('click', this.toggleOptionSelect.bind(this))
 
-    var closedOnLoad = this.$optionSelect.getAttribute('data-closed-on-load')
-    var closedOnLoadMobile = this.$optionSelect.getAttribute('data-closed-on-load-mobile')
-
-    // By default the .filter-content container is hidden on mobile
-    // By checking if .filter-content is hidden, we are in mobile view given the current implementation
-    var isFacetsContentHidden = this.isFacetsContainerHidden()
-
-    // Check if the option select should be closed for mobile screen sizes
-    var closedForMobile = closedOnLoadMobile === 'true' && isFacetsContentHidden
-
-    // Always set the contain height to 200px for mobile screen sizes
-    if (closedForMobile) {
-      this.setContainerHeight(200)
-    }
-
-    if (closedOnLoad === 'true' || closedForMobile) {
-      this.close()
+    // Toggle option visibility depending on screen size (min-width: 641px) and
+    // presence of any 'closed' properties (`data-closed-on-load`, `data-closed-on-load-mobile`).
+    // See https://github.com/alphagov/govuk-frontend/blob/main/packages/govuk-frontend/src/govuk/settings/_media-queries.scss#L10-L14
+    if (this.mq.matches) {
+      this.toggleVisibility(true)
     } else {
-      this.setupHeight()
+      this.toggleVisibility(false)
     }
 
     var checkedString = this.checkedString()
@@ -84,6 +76,22 @@ window.GOVUK.Modules = window.GOVUK.Modules || {};
     }
   }
 
+  OptionSelect.prototype.toggleVisibility = function (isTabletOrLarger) {
+    if (isTabletOrLarger) {
+      if (this.isClosedOnLoad === 'true') {
+        this.close()
+      } else {
+        this.setupHeight()
+      }
+    } else {
+      if (this.isClosedOnLoadMobile === 'true' || this.isClosedOnLoad === 'true') {
+        this.close()
+      } else {
+        this.setContainerHeight(201)
+      }
+    }
+  }
+
   OptionSelect.prototype.typeFilterText = function (event) {
     event.stopPropagation()
     var ENTER_KEY = 13

app/assets/javascripts/modules/mobile-filters-modal.js

@@ -17,6 +17,10 @@ window.GOVUK.Modules = window.GOVUK.Modules || {};
       this.triggerElement.addEventListener('click', this.module.toggle)
       this.triggerElement.setAttribute('aria-controls', this.module.id)
       this.triggerElement.setAttribute('aria-expanded', 'false')
+      // Open filter on page load if data attribute "open_on_load" is present
+      if (this.triggerElement.getAttribute('data-open-on-load') === 'true') {
+        this.triggerElement.click()
+      }
     }
 
     if (this.clearFiltersTrigger) {

app/models/content_item.rb

@@ -46,6 +46,10 @@ def filter
     content_item_hash.dig("details", "filter") || {}
   end
 
+  def open_filter_on_load
+    content_item_hash.dig("details", "open_filter_on_load") || ""
+  end
+
   def reject
     content_item_hash.dig("details", "reject") || {}
   end

app/views/finders/_filter_button.html.erb

@@ -8,6 +8,7 @@
     data-track-label=""
     data-module="ga4-event-tracker"
     data-ga4-expandable=""
+    data-open-on-load="<%= @content_item.open_filter_on_load %>"
     >
       Filter <span class="govuk-visually-hidden"> results</span>
       <span class="js-selected-filter-count"><%= sanitize facet_tags.display_total_selected_filters %></span>

spec/javascripts/modules/mobile-filters-modal.spec.js

@@ -1,4 +1,4 @@
-describe('Mobile filters modal', function () {
+describe('Mobile filters', function () {
   'use strict'
 
   var container
@@ -44,107 +44,127 @@ describe('Mobile filters modal', function () {
     container.addEventListener('submit', function (e) {
       e.preventDefault()
     })
-
-    var element = $('[data-module="mobile-filters-modal"]')[0]
-    new GOVUK.Modules.MobileFiltersModal(element).init()
   })
 
   afterEach(function () {
     document.body.removeChild(container)
   })
 
-  describe('open button', function () {
+  describe('Mobile filters modal', function () {
     beforeEach(function () {
-      document.querySelector('.js-toggle-mobile-filters').click()
-    })
-
-    afterEach(function () {
-      document.querySelector('.js-toggle-mobile-filters').click()
-    })
-
-    it('should show the modal', function () {
-      var modal = document.querySelector('.facets')
-      expect($(modal).hasClass('facets--visible')).toBe(true)
+      var element = $('[data-module="mobile-filters-modal"]')[0]
+      new GOVUK.Modules.MobileFiltersModal(element).init()
     })
 
-    it('should hide the modal', function () {
-      var modal = document.querySelector('.facets')
-      document.querySelector('.js-toggle-mobile-filters').click()
-      expect($(modal).hasClass('facets--visible')).toBe(false)
+    describe('open button', function () {
+      beforeEach(function () {
+        document.querySelector('.js-toggle-mobile-filters').click()
+      })
+
+      afterEach(function () {
+        document.querySelector('.js-toggle-mobile-filters').click()
+      })
+
+      it('should show the modal', function () {
+        var modal = document.querySelector('.facets')
+        expect($(modal).hasClass('facets--visible')).toBe(true)
+      })
+
+      it('should hide the modal', function () {
+        var modal = document.querySelector('.facets')
+        document.querySelector('.js-toggle-mobile-filters').click()
+        expect($(modal).hasClass('facets--visible')).toBe(false)
+      })
     })
-  })
 
-  describe('open', function () {
-    beforeEach(function () {
-      var modal = document.querySelector('.facets')
-      modal.open()
+    describe('open', function () {
+      beforeEach(function () {
+        var modal = document.querySelector('.facets')
+        modal.open()
+      })
+
+      afterEach(function () {
+        var modal = document.querySelector('.facets')
+        modal.close()
+      })
+
+      it('should show the modal', function () {
+        var modal = document.querySelector('.facets')
+        expect($(modal).hasClass('facets--visible')).toBe(true)
+      })
     })
 
-    afterEach(function () {
-      var modal = document.querySelector('.facets')
-      modal.close()
+    describe('close', function () {
+      it('should hide the modal', function () {
+        var modal = document.querySelector('.facets')
+        modal.open()
+        modal.close()
+        expect($(modal).hasClass('facets--visible')).toBe(false)
+      })
     })
 
-    it('should show the modal', function () {
-      var modal = document.querySelector('.facets')
-      expect($(modal).hasClass('facets--visible')).toBe(true)
+    describe('clear filters', function () {
+      it('should reset checkboxes, clear text input and <select> values', function () {
+        var modal = document.querySelector('.facets')
+        modal.clearFilters()
+        expect($(modal).find('input:checked').length).toBe(0)
+        // number of text inputs with value should now be 0
+        expect($(modal).find('input[type="text"]')
+          .filter(function () { return $(this).val() }).length).toBe(0)
+        expect($(modal).find('select').val()).toBe('')
+      })
     })
-  })
 
-  describe('close', function () {
-    it('should hide the modal', function () {
-      var modal = document.querySelector('.facets')
-      modal.open()
-      modal.close()
-      expect($(modal).hasClass('facets--visible')).toBe(false)
+    describe('accessibility', function () {
+      it('should add aria-expanded="false" on load to the Filter button', function () {
+        var button = document.querySelector('.js-toggle-mobile-filters')
+        expect(button.getAttribute('aria-expanded')).toEqual('false')
+      })
+
+      it('should set aria-expanded to true when clicking the Filter button', function () {
+        var button = document.querySelector('.js-toggle-mobile-filters')
+        button.click()
+        expect(button.getAttribute('aria-expanded')).toEqual('true')
+      })
+
+      it('should add aria-controls on load to the Filter button', function () {
+        var button = document.querySelector('.js-toggle-mobile-filters')
+        expect(button.getAttribute('aria-controls')).toEqual('facet-wrapper')
+        expect(document.querySelector('#facet-wrapper')).not.toEqual(null)
+      })
     })
-  })
 
-  describe('clear filters', function () {
-    it('should reset checkboxes, clear text input and <select> values', function () {
-      var modal = document.querySelector('.facets')
-      modal.clearFilters()
-      expect($(modal).find('input:checked').length).toBe(0)
-      // number of text inputs with value should now be 0
-      expect($(modal).find('input[type="text"]')
-        .filter(function () { return $(this).val() }).length).toBe(0)
-      expect($(modal).find('select').val()).toBe('')
+    describe('ga4 tracking', function () {
+      it('adds the ga4 event tracker to the button', function () {
+        var button = document.querySelector('.js-toggle-mobile-filters')
+        var expected = {
+          event_name: 'select_content',
+          type: 'finder',
+          text: 'Filter',
+          section: 'Filter',
+          index: {
+            index_section: 0,
+            index_section_count: 5
+          }
+        }
+        expect(button.getAttribute('data-ga4-event')).toEqual(JSON.stringify(expected))
+      })
     })
   })
 
-  describe('accessibility', function () {
-    it('should add aria-expanded="false" on load to the Filter button', function () {
-      var button = document.querySelector('.js-toggle-mobile-filters')
-      expect(button.getAttribute('aria-expanded')).toEqual('false')
-    })
-
-    it('should set aria-expanded to true when clicking the Filter button', function () {
-      var button = document.querySelector('.js-toggle-mobile-filters')
-      button.click()
-      expect(button.getAttribute('aria-expanded')).toEqual('true')
-    })
+  describe('Mobile filters modal (open on load)', function () {
+    beforeEach(function () {
+      container.querySelector('button').dataset.openOnLoad = true
 
-    it('should add aria-controls on load to the Filter button', function () {
-      var button = document.querySelector('.js-toggle-mobile-filters')
-      expect(button.getAttribute('aria-controls')).toEqual('facet-wrapper')
-      expect(document.querySelector('#facet-wrapper')).not.toEqual(null)
+      var element = $('[data-module="mobile-filters-modal"]')[0]
+      new GOVUK.Modules.MobileFiltersModal(element).init()
     })
-  })
 
-  describe('ga4 tracking', function () {
-    it('adds the ga4 event tracker to the button', function () {
-      var button = document.querySelector('.js-toggle-mobile-filters')
-      var expected = {
-        event_name: 'select_content',
-        type: 'finder',
-        text: 'Filter',
-        section: 'Filter',
-        index: {
-          index_section: 0,
-          index_section_count: 5
-        }
-      }
-      expect(button.getAttribute('data-ga4-event')).toEqual(JSON.stringify(expected))
+    describe('open on load', function () {
+      it('should show the modal', function () {
+        var modal = document.querySelector('.facets')
+        expect($(modal).hasClass('facets--visible')).toBe(true)
+      })
     })
   })
 })