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{"version":3,"file":"drawers.min.js","sources":["../src/drawers.js"],"sourcesContent":["// This file is part of Moodle - http://moodle.org/\n//\n// Moodle is free software: you can redistribute it and/or modify\n// it under the terms of the GNU General Public License as published by\n// the Free Software Foundation, either version 3 of the License, or\n// (at your option) any later version.\n//\n// Moodle is distributed in the hope that it will be useful,\n// but WITHOUT ANY WARRANTY; without even the implied warranty of\n// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the\n// GNU General Public License for more details.\n//\n// You should have received a copy of the GNU General Public License\n// along with Moodle. If not, see <http://www.gnu.org/licenses/>.\n\n/**\n * Toggling the visibility of the secondary navigation on mobile.\n *\n * @module theme_universe/drawers\n * @copyright 2021 Bas Brands\n * @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later\n */\nimport ModalBackdrop from 'core/modal_backdrop';\nimport Templates from 'core/templates';\nimport * as Aria from 'core/aria';\nimport {dispatchEvent} from 'core/event_dispatcher';\nimport {debounce} from 'core/utils';\nimport {isSmall, isLarge} from 'core/pagehelpers';\nimport Pending from 'core/pending';\nimport {setUserPreference} from 'core_user/repository';\nimport Tooltip from './bootstrap/tooltip';\n\nlet backdropPromise = null;\n\nconst drawerMap = new Map();\n\nconst SELECTORS = {\n BUTTONS: '[data-toggler=\"drawers\"]',\n CLOSEBTN: '[data-toggler=\"drawers\"][data-action=\"closedrawer\"]',\n OPENBTN: '[data-toggler=\"drawers\"][data-action=\"opendrawer\"]',\n TOGGLEBTN: '[data-toggler=\"drawers\"][data-action=\"toggle\"]',\n DRAWERS: '[data-region=\"fixed-drawer\"]',\n DRAWERCONTENT: '.drawercontent',\n PAGECONTENT: '#page-content',\n HEADERCONTENT: '.drawerheadercontent',\n};\n\nconst CLASSES = {\n SCROLLED: 'scrolled',\n SHOW: 'show',\n NOTINITIALISED: 'not-initialized',\n};\n\n/**\n * Pixel thresshold to auto-hide drawers.\n *\n * @type {Number}\n */\nconst THRESHOLD = 20;\n\n/**\n * Try to get the drawer z-index from the page content.\n *\n * @returns {Number|null} the z-index of the drawer.\n * @private\n */\nconst getDrawerZIndex = () => {\n const drawer = document.querySelector(SELECTORS.DRAWERS);\n if (!drawer) {\n return null;\n }\n return parseInt(window.getComputedStyle(drawer).zIndex, 10);\n};\n\n/**\n * Add a backdrop to the page.\n *\n * @returns {Promise} rendering of modal backdrop.\n * @private\n */\nconst getBackdrop = () => {\n if (!backdropPromise) {\n backdropPromise = Templates.render('core/modal_backdrop', {})\n .then(html => new ModalBackdrop(html))\n .then(modalBackdrop => {\n const drawerZindex = getDrawerZIndex();\n if (drawerZindex) {\n modalBackdrop.setZIndex(getDrawerZIndex() - 1);\n }\n modalBackdrop.getAttachmentPoint().get(0).addEventListener('click', e => {\n e.preventDefault();\n Drawers.closeAllDrawers();\n });\n return modalBackdrop;\n })\n .catch();\n }\n return backdropPromise;\n};\n\n/**\n * Get the button element to open a specific drawer.\n *\n * @param {String} drawerId the drawer element Id\n * @return {HTMLElement|undefined} the open button element\n * @private\n */\nconst getDrawerOpenButton = (drawerId) => {\n let openButton = document.querySelector(`${SELECTORS.OPENBTN}[data-target=\"${drawerId}\"]`);\n if (!openButton) {\n openButton = document.querySelector(`${SELECTORS.TOGGLEBTN}[data-target=\"${drawerId}\"]`);\n }\n return openButton;\n};\n\n/**\n * Disable drawer tooltips.\n *\n * @param {HTMLElement} drawerNode the drawer main node\n * @private\n */\nconst disableDrawerTooltips = (drawerNode) => {\n const buttons = [\n drawerNode.querySelector(SELECTORS.CLOSEBTN),\n getDrawerOpenButton(drawerNode.id),\n ];\n buttons.forEach(button => {\n if (!button) {\n return;\n }\n disableButtonTooltip(button);\n });\n};\n\n/**\n * Disable the button tooltips.\n *\n * @param {HTMLElement} button the button element\n * @param {boolean} enableOnBlur if the tooltip must be re-enabled on blur.\n * @private\n */\nconst disableButtonTooltip = (button, enableOnBlur) => {\n if (button.hasAttribute('data-original-title')) {\n Tooltip.getInstance(button).disable();\n button.setAttribute('title', button.dataset.originalTitle);\n } else {\n button.dataset.disabledToggle = button.dataset.toggle;\n button.removeAttribute('data-bs-toggle');\n }\n if (enableOnBlur) {\n button.dataset.restoreTooltipOnBlur = true;\n }\n};\n\n/**\n * Enable drawer tooltips.\n *\n * @param {HTMLElement} drawerNode the drawer main node\n * @private\n */\nconst enableDrawerTooltips = (drawerNode) => {\n const buttons = [\n drawerNode.querySelector(SELECTORS.CLOSEBTN),\n getDrawerOpenButton(drawerNode.id),\n ];\n buttons.forEach(button => {\n if (!button) {\n return;\n }\n enableButtonTooltip(button);\n });\n};\n\n/**\n * Enable the button tooltips.\n *\n * @param {HTMLElement} button the button element\n * @private\n */\nconst enableButtonTooltip = (button) => {\n if (button.hasAttribute('data-bs-original-title')) {\n Tooltip.getInstance(button).enable();\n button.removeAttribute('title');\n } else if (button.dataset.disabledToggle) {\n button.dataset.toggle = button.dataset.disabledToggle;\n new Tooltip(button);\n }\n delete button.dataset.restoreTooltipOnBlur;\n};\n\n/**\n * Add scroll listeners to a drawer element.\n *\n * @param {HTMLElement} drawerNode the drawer main node\n * @private\n */\nconst addInnerScrollListener = (drawerNode) => {\n const content = drawerNode.querySelector(SELECTORS.DRAWERCONTENT);\n if (!content) {\n return;\n }\n content.addEventListener(\"scroll\", () => {\n drawerNode.classList.toggle(\n CLASSES.SCROLLED,\n content.scrollTop != 0\n );\n });\n};\n\n/**\n * The Drawers class is used to control on-screen drawer elements.\n *\n * It handles opening, and closing of drawer elements, as well as more detailed behaviours such as closing a drawer when\n * another drawer is opened, and supports closing a drawer when the screen is resized.\n *\n * Drawers are instantiated on page load, and can also be toggled lazily when toggling any drawer toggle, open button,\n * or close button.\n *\n * A range of show and hide events are also dispatched as detailed in the class\n * {@link module:theme_universe/drawers#eventTypes eventTypes} object.\n *\n * @example <caption>Standard usage</caption>\n *\n * // The module just needs to be included to add drawer support.\n * import 'theme_universe/drawers';\n *\n * @example <caption>Manually open or close any drawer</caption>\n *\n * import Drawers from 'theme_universe/drawers';\n *\n *const myDrawer = Drawers.getDrawerInstanceForNode(document.querySelector('.myDrawerNode');\n * myDrawer.closeDrawer();\n *\n * @example <caption>Listen to the before show event and cancel it</caption>\n *\n * import Drawers from 'theme_universe/drawers';\n *\n * document.addEventListener(Drawers.eventTypes.drawerShow, e => {\n * // The drawer which will be shown.\n * window.console.log(e.target);\n *\n * // The instance of the Drawers class for this drawer.\n * window.console.log(e.detail.drawerInstance);\n *\n * // Prevent this drawer from being shown.\n * e.preventDefault();\n * });\n *\n * @example <caption>Listen to the shown event</caption>\n *\n * document.addEventListener(Drawers.eventTypes.drawerShown, e => {\n * // The drawer which was shown.\n * window.console.log(e.target);\n *\n * // The instance of the Drawers class for this drawer.\n * window.console.log(e.detail.drawerInstance);\n * });\n */\nexport default class Drawers {\n /**\n * The underlying HTMLElement which is controlled.\n */\n drawerNode = null;\n\n /**\n * The drawer page bounding box dimensions.\n * @var {DOMRect} boundingRect\n */\n boundingRect = null;\n\n constructor(drawerNode) {\n // Some behat tests may use fake drawer divs to test components in drawers.\n if (drawerNode.dataset.behatFakeDrawer !== undefined) {\n return;\n }\n\n this.drawerNode = drawerNode;\n\n if (isSmall()) {\n this.closeDrawer({focusOnOpenButton: false, updatePreferences: false});\n }\n\n if (this.drawerNode.classList.contains(CLASSES.SHOW)) {\n this.openDrawer({focusOnCloseButton: false, setUserPref: false});\n } else if (this.drawerNode.dataset.forceopen == 1) {\n if (!isSmall()) {\n this.openDrawer({focusOnCloseButton: false, setUserPref: false});\n }\n } else {\n Aria.hide(this.drawerNode);\n }\n\n // Disable tooltips in small screens.\n if (isSmall()) {\n disableDrawerTooltips(this.drawerNode);\n }\n\n addInnerScrollListener(this.drawerNode);\n\n drawerMap.set(drawerNode, this);\n\n drawerNode.classList.remove(CLASSES.NOTINITIALISED);\n }\n\n /**\n * Whether the drawer is open.\n *\n * @returns {boolean}\n */\n get isOpen() {\n return this.drawerNode.classList.contains(CLASSES.SHOW);\n }\n\n /**\n * Whether the drawer should close when the window is resized\n *\n * @returns {boolean}\n */\n get closeOnResize() {\n return !!parseInt(this.drawerNode.dataset.closeOnResize);\n }\n\n /**\n * The list of event types.\n *\n * @static\n * @property {String} drawerShow See {@link event:theme_universe/drawers:show}\n * @property {String} drawerShown See {@link event:theme_universe/drawers:shown}\n * @property {String} drawerHide See {@link event:theme_universe/drawers:hide}\n * @property {String} drawerHidden See {@link event:theme_universe/drawers:hidden}\n */\n static eventTypes = {\n /**\n * An event triggered before a drawer is shown.\n *\n * @event theme_universe/drawers:show\n * @type {CustomEvent}\n * @property {HTMLElement} target The drawer that will be opened.\n */\n drawerShow: 'theme_universe/drawers:show',\n\n /**\n * An event triggered after a drawer is shown.\n *\n * @event theme_universe/drawers:shown\n * @type {CustomEvent}\n * @property {HTMLElement} target The drawer that was be opened.\n */\n drawerShown: 'theme_universe/drawers:shown',\n\n /**\n * An event triggered before a drawer is hidden.\n *\n * @event theme_universe/drawers:hide\n * @type {CustomEvent}\n * @property {HTMLElement} target The drawer that will be hidden.\n */\n drawerHide: 'theme_universe/drawers:hide',\n\n /**\n * An event triggered after a drawer is hidden.\n *\n * @event theme_universe/drawers:hidden\n * @type {CustomEvent}\n * @property {HTMLElement} target The drawer that was be hidden.\n */\n drawerHidden: 'theme_universe/drawers:hidden',\n };\n\n\n /**\n * Get the drawer instance for the specified node\n *\n * @param {HTMLElement} drawerNode\n * @returns {module:theme_universe/drawers}\n */\n static getDrawerInstanceForNode(drawerNode) {\n if (!drawerMap.has(drawerNode)) {\n new Drawers(drawerNode);\n }\n\n return drawerMap.get(drawerNode);\n }\n\n /**\n * Dispatch a drawer event.\n *\n * @param {string} eventname the event name\n * @param {boolean} cancelable if the event is cancelable\n * @returns {CustomEvent} the resulting custom event\n */\n dispatchEvent(eventname, cancelable = false) {\n return dispatchEvent(\n eventname,\n {\n drawerInstance: this,\n },\n this.drawerNode,\n {\n cancelable,\n }\n );\n }\n\n /**\n * Open the drawer.\n *\n * By default, openDrawer sets the page focus to the close drawer button. However, when a drawer is open at page\n * load, this represents an accessibility problem as the initial focus changes without any user interaction. The\n * focusOnCloseButton parameter can be set to false to prevent this behaviour.\n *\n * @param {object} args\n * @param {boolean} [args.focusOnCloseButton=true] Whether to alter page focus when opening the drawer\n * @param {boolean} [args.setUserPref=true] Whether to store the opened drawer state as a user preference\n */\n openDrawer({focusOnCloseButton = true, setUserPref = true} = {}) {\n\n const pendingPromise = new Pending('theme_universe/drawers:open');\n const showEvent = this.dispatchEvent(Drawers.eventTypes.drawerShow, true);\n if (showEvent.defaultPrevented) {\n return;\n }\n\n // Hide close button and header content while the drawer is showing to prevent glitchy effects.\n this.drawerNode.querySelector(SELECTORS.CLOSEBTN)?.classList.toggle('hidden', true);\n this.drawerNode.querySelector(SELECTORS.HEADERCONTENT)?.classList.toggle('hidden', true);\n\n\n // Remove open tooltip if still visible.\n let openButton = getDrawerOpenButton(this.drawerNode.id);\n if (openButton && openButton.hasAttribute('data-original-title')) {\n Tooltip.getInstance(openButton)?.hide();\n }\n\n Aria.unhide(this.drawerNode);\n this.drawerNode.classList.add(CLASSES.SHOW);\n\n const preference = this.drawerNode.dataset.preference;\n if (preference && !isSmall() && (this.drawerNode.dataset.forceopen != 1) && setUserPref) {\n setUserPreference(preference, true);\n }\n\n const state = this.drawerNode.dataset.state;\nif (state) {\n const page = document.getElementById('page');\n page.classList.add(state);\n }\n\n this.boundingRect = this.drawerNode.getBoundingClientRect();\n\n if (isSmall()) {\n getBackdrop().then(backdrop => {\n backdrop.show();\n\n const pageWrapper = document.getElementById('page');\n pageWrapper.style.overflow = 'hidden';\n return backdrop;\n })\n .catch();\n }\n\n // Show close button and header content once the drawer is fully opened.\n const closeButton = this.drawerNode.querySelector(SELECTORS.CLOSEBTN);\n const headerContent = this.drawerNode.querySelector(SELECTORS.HEADERCONTENT);\n if (focusOnCloseButton && closeButton) {\n disableButtonTooltip(closeButton, true);\n }\n setTimeout(() => {\n closeButton.classList.toggle('hidden', false);\n headerContent.classList.toggle('hidden', false);\n if (focusOnCloseButton) {\n closeButton.focus();\n }\n pendingPromise.resolve();\n }, 300);\n\n this.dispatchEvent(Drawers.eventTypes.drawerShown);\n }\n\n /**\n * Close the drawer.\n *\n * @param {object} args\n * @param {boolean} [args.focusOnOpenButton=true] Whether to alter page focus when opening the drawer\n * @param {boolean} [args.updatePreferences=true] Whether to update the user prewference\n */\n closeDrawer({focusOnOpenButton = true, updatePreferences = true} = {}) {\n\n const pendingPromise = new Pending('theme_universe/drawers:close');\n\n const hideEvent = this.dispatchEvent(Drawers.eventTypes.drawerHide, true);\n if (hideEvent.defaultPrevented) {\n return;\n }\n\n // Hide close button and header content while the drawer is hiding to prevent glitchy effects.\n const closeButton = this.drawerNode.querySelector(SELECTORS.CLOSEBTN);\ncloseButton?.classList.toggle('hidden', true);\n const headerContent = this.drawerNode.querySelector(SELECTORS.HEADERCONTENT);\n headerContent?.classList.toggle('hidden', true);\n // Remove the close button tooltip if visible.\n if (closeButton.hasAttribute('data-original-title')) {\n Tooltip.getInstance(closeButton)?.hide();\n }\n\n const preference = this.drawerNode.dataset.preference;\n if (preference && updatePreferences && !isSmall()) {\n setUserPreference(preference, false);\n }\n\n const state = this.drawerNode.dataset.state;\n if (state) {\n const page = document.getElementById('page');\n page.classList.remove(state);\n }\n\n Aria.hide(this.drawerNode);\n this.drawerNode.classList.remove(CLASSES.SHOW);\n\n getBackdrop().then(backdrop => {\n backdrop.hide();\n\n if (isSmall()) {\n const pageWrapper = document.getElementById('page');\n pageWrapper.style.overflow = 'visible';\n }\n return backdrop;\n })\n .catch();\n\n // Move focus to the open drawer (or toggler) button once the drawer is hidden.\n let openButton = getDrawerOpenButton(this.drawerNode.id);\n if (openButton) {\n disableButtonTooltip(openButton, true);\n }\n setTimeout(() => {\n if (openButton && focusOnOpenButton) {\n openButton.focus();\n }\n pendingPromise.resolve();\n }, 300);\n\n this.dispatchEvent(Drawers.eventTypes.drawerHidden);\n }\n\n /**\n * Toggle visibility of the drawer.\n */\n toggleVisibility() {\n if (this.drawerNode.classList.contains(CLASSES.SHOW)) {\n this.closeDrawer();\n } else {\n this.openDrawer();\n }\n }\n\n /**\n * Displaces the drawer outsite the page.\n *\n * @param {Number} scrollPosition the pagecurrent scroll position\n */\n displace(scrollPosition) {\n let displace = scrollPosition;\n let openButton = getDrawerOpenButton(this.drawerNode.id);\n if (scrollPosition === 0) {\n this.drawerNode.style.transform = '';\n if (openButton) {\n openButton.style.transform = '';\n }\n return;\n }\n const state = this.drawerNode.dataset?.state;\n const drawrWidth = this.drawerNode.offsetWidth;\n let scrollThreshold = drawrWidth;\n let direction = -1;\n if (state === 'show-drawer-right') {\n direction = 1;\n scrollThreshold = THRESHOLD;\n }\n // LTR scroll is positive while RTL scroll is negative.\n if (Math.abs(scrollPosition) > scrollThreshold) {\n displace = Math.sign(scrollPosition) * (drawrWidth + THRESHOLD);\n }\n displace *= direction;\n const transform = `translateX(${displace}px)`;\n if (openButton) {\n openButton.style.transform = transform;\n }\n this.drawerNode.style.transform = transform;\n }\n\n /**\n * Prevent drawer from overlapping an element.\n *\n * @param {HTMLElement} currentFocus\n */\n preventOverlap(currentFocus) {\n // Start position drawer (aka. left drawer) will never overlap with the page content.\n if (!this.isOpen || this.drawerNode.dataset?.state === 'show-drawer-left') {\n return;\n }\n const drawrWidth = this.drawerNode.offsetWidth;\n const element = currentFocus.getBoundingClientRect();\n\n // The this.boundingRect is calculated only once and it is reliable\n // for horizontal overlapping (which is the most common). However,\n // it is not reliable for vertical overlapping because the drawer\n // height can be changed by other elements like sticky footer.\n // To prevent recalculating the boundingRect on every\n // focusin event, we use horizontal overlapping as first fast check.\n let overlapping = (\n (element.right + THRESHOLD) > this.boundingRect.left &&\n (element.left - THRESHOLD) < this.boundingRect.right\n );\n if (overlapping) {\n const currentBoundingRect = this.drawerNode.getBoundingClientRect();\n overlapping = (\n (element.bottom) > currentBoundingRect.top &&\n (element.top) < currentBoundingRect.bottom\n );\n }\n\n if (overlapping) {\n // Force drawer to displace out of the page.\n let displaceOut = drawrWidth + 1;\n if (window.right_to_left()) {\n displaceOut *= -1;\n }\n this.displace(displaceOut);\n } else {\n // Reset drawer displacement.\n this.displace(window.scrollX);\n }\n }\n\n /**\n * Close all drawers.\n */\n static closeAllDrawers() {\n drawerMap.forEach(drawerInstance => {\n drawerInstance.closeDrawer();\n });\n }\n\n /**\n * Close all drawers except for the specified drawer.\n *\n * @param {module:theme_universe/drawers} comparisonInstance\n */\n static closeOtherDrawers(comparisonInstance) {\n drawerMap.forEach(drawerInstance => {\n if (drawerInstance === comparisonInstance) {\n return;\n }\n\n drawerInstance.closeDrawer();\n });\n }\n\n /**\n * Prevent drawers from covering the focused element.\n */\n static preventCoveringFocusedElement() {\n const currentFocus = document.activeElement;\n // Focus on page layout elements should be ignored.\n const pagecontent = document.querySelector(SELECTORS.PAGECONTENT);\n if (!currentFocus || !pagecontent?.contains(currentFocus)) {\n Drawers.displaceDrawers(window.scrollX);\n return;\n }\n drawerMap.forEach(drawerInstance => {\n drawerInstance.preventOverlap(currentFocus);\n });\n }\n\n /**\n * Prevent drawer from covering the content when the page content covers the full page.\n *\n * @param {Number} displace\n */\n static displaceDrawers(displace) {\n drawerMap.forEach(drawerInstance => {\n drawerInstance.displace(displace);\n });\n }\n}\n\n/**\n * Set the last used attribute for the last used toggle button for a drawer.\n *\n * @param {object} toggleButton The clicked button.\n */\nconst setLastUsedToggle = (toggleButton) => {\n if (toggleButton.dataset.target) {\n document.querySelectorAll(`${SELECTORS.BUTTONS}[data-target=\"${toggleButton.dataset.target}\"]`)\n .forEach(btn => {\n btn.dataset.lastused = false;\n });\n toggleButton.dataset.lastused = true;\n }\n};\n\n/**\n * Set the focus to the last used button to open this drawer.\n * @param {string} target The drawer target.\n */\nconst focusLastUsedToggle = (target) => {\n const lastUsedButton = document.querySelector(`${SELECTORS.BUTTONS}[data-target=\"${target}\"][data-lastused=\"true\"`);\n if (lastUsedButton) {\n lastUsedButton.focus();\n }\n};\n\n/**\n * Register the event listeners for the drawer.\n *\n * @private\n */\nconst registerListeners = () => {\n // Listen for show/hide events.\n document.addEventListener('click', e => {\n const toggleButton = e.target.closest(SELECTORS.TOGGLEBTN);\n if (toggleButton && toggleButton.dataset.target) {\n e.preventDefault();\n const targetDrawer = document.getElementById(toggleButton.dataset.target);\n const drawerInstance = Drawers.getDrawerInstanceForNode(targetDrawer);\n setLastUsedToggle(toggleButton);\n\n drawerInstance.toggleVisibility();\n }\n\n const openDrawerButton = e.target.closest(SELECTORS.OPENBTN);\n if (openDrawerButton && openDrawerButton.dataset.target) {\n e.preventDefault();\n const targetDrawer = document.getElementById(openDrawerButton.dataset.target);\n const drawerInstance = Drawers.getDrawerInstanceForNode(targetDrawer);\n setLastUsedToggle(toggleButton);\n\n drawerInstance.openDrawer();\n }\n\n const closeDrawerButton = e.target.closest(SELECTORS.CLOSEBTN);\n if (closeDrawerButton && closeDrawerButton.dataset.target) {\n e.preventDefault();\n const targetDrawer = document.getElementById(closeDrawerButton.dataset.target);\n const drawerInstance = Drawers.getDrawerInstanceForNode(targetDrawer);\n\n drawerInstance.closeDrawer();\n focusLastUsedToggle(closeDrawerButton.dataset.target);\n }\n });\n\n // Close drawer when another drawer opens.\n document.addEventListener(Drawers.eventTypes.drawerShow, e => {\n if (isLarge()) {\n return;\n }\n Drawers.closeOtherDrawers(e.detail.drawerInstance);\n });\n\n // Tooglers and openers blur listeners.\n const btnSelector = `${SELECTORS.TOGGLEBTN}, ${SELECTORS.OPENBTN}, ${SELECTORS.CLOSEBTN}`;\n document.addEventListener('focusout', (e) => {\n const button = e.target.closest(btnSelector);\n if (button?.dataset.restoreTooltipOnBlur !== undefined) {\n enableButtonTooltip(button);\n }\n });\n\n const closeOnResizeListener = () => {\n if (isSmall()) {\n let anyOpen = false;\n drawerMap.forEach(drawerInstance => {\n disableDrawerTooltips(drawerInstance.drawerNode);\n if (drawerInstance.isOpen) {\n const currentFocus = document.activeElement;\n const drawerContent = drawerInstance.drawerNode.querySelector(SELECTORS.DRAWERCONTENT);\n const shouldClose = drawerInstance.closeOnResize && (!drawerContent || !drawerContent.contains(currentFocus));\n if (shouldClose) {\n drawerInstance.closeDrawer();\n} else {\n anyOpen = true;\n }\n }\n });\n\n if (anyOpen) {\n getBackdrop().then(backdrop => backdrop.show()).catch();\n }\n } else {\n drawerMap.forEach(drawerInstance => {\n enableDrawerTooltips(drawerInstance.drawerNode);\n });\n getBackdrop().then(backdrop => backdrop.hide()).catch();\n }\n };\n\n document.addEventListener('scroll', () => {\n const currentFocus = document.activeElement;\n const drawerContentElements = document.querySelectorAll(SELECTORS.DRAWERCONTENT);\n // Check if the current focus is within any drawer content.\n if (Array.from(drawerContentElements).some(drawer => drawer.contains(currentFocus))) {\n return;\n }\n const body = document.querySelector('body');\n if (window.scrollY >= window.innerHeight) {\n body.classList.add(CLASSES.SCROLLED);\n } else {\n body.classList.remove(CLASSES.SCROLLED);\n }\n // Horizontal scroll listener to displace the drawers to prevent covering\n // any possible sticky content.\n Drawers.displaceDrawers(window.scrollX);\n });\n\n const preventOverlap = debounce(Drawers.preventCoveringFocusedElement, 100);\n document.addEventListener('focusin', preventOverlap);\n document.addEventListener('focusout', preventOverlap);\n\n window.addEventListener('resize', debounce(closeOnResizeListener, 400, {pending: true}));\n};\n\nregisterListeners();\n\nconst drawers = document.querySelectorAll(SELECTORS.DRAWERS);\ndrawers.forEach(drawerNode => 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