Added wordpress

1 files changed, 800 insertions, 0 deletions

diff --git a/srcs/wordpress/wp-content/themes/twentytwenty/assets/js/index.js b/srcs/wordpress/wp-content/themes/twentytwenty/assets/js/index.js
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index 0000000..5ded185
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+++ b/srcs/wordpress/wp-content/themes/twentytwenty/assets/js/index.js
@@ -0,0 +1,800 @@
+/*	-----------------------------------------------------------------------------------------------
+	Namespace
+--------------------------------------------------------------------------------------------------- */
+
+var twentytwenty = twentytwenty || {};
+
+// Set a default value for scrolled.
+twentytwenty.scrolled = 0;
+
+// polyfill closest
+// https://developer.mozilla.org/en-US/docs/Web/API/Element/closest#Polyfill
+if ( ! Element.prototype.closest ) {
+	Element.prototype.closest = function( s ) {
+		var el = this;
+
+		do {
+			if ( el.matches( s ) ) {
+				return el;
+			}
+
+			el = el.parentElement || el.parentNode;
+		} while ( el !== null && el.nodeType === 1 );
+
+		return null;
+	};
+}
+
+// polyfill forEach
+// https://developer.mozilla.org/en-US/docs/Web/API/NodeList/forEach#Polyfill
+if ( window.NodeList && ! NodeList.prototype.forEach ) {
+	NodeList.prototype.forEach = function( callback, thisArg ) {
+		var i;
+		var len = this.length;
+
+		thisArg = thisArg || window;
+
+		for ( i = 0; i < len; i++ ) {
+			callback.call( thisArg, this[ i ], i, this );
+		}
+	};
+}
+
+// event "polyfill"
+twentytwenty.createEvent = function( eventName ) {
+	var event;
+	if ( typeof window.Event === 'function' ) {
+		event = new Event( eventName );
+	} else {
+		event = document.createEvent( 'Event' );
+		event.initEvent( eventName, true, false );
+	}
+	return event;
+};
+
+// matches "polyfill"
+// https://developer.mozilla.org/es/docs/Web/API/Element/matches
+if ( ! Element.prototype.matches ) {
+	Element.prototype.matches =
+		Element.prototype.matchesSelector ||
+		Element.prototype.mozMatchesSelector ||
+		Element.prototype.msMatchesSelector ||
+		Element.prototype.oMatchesSelector ||
+		Element.prototype.webkitMatchesSelector ||
+		function( s ) {
+			var matches = ( this.document || this.ownerDocument ).querySelectorAll( s ),
+				i = matches.length;
+			while ( --i >= 0 && matches.item( i ) !== this ) {}
+			return i > -1;
+		};
+}
+
+// Add a class to the body for when touch is enabled for browsers that don't support media queries
+// for interaction media features. Adapted from <https://codepen.io/Ferie/pen/vQOMmO>
+twentytwenty.touchEnabled = {
+
+	init: function() {
+		var matchMedia = function() {
+			// Include the 'heartz' as a way to have a non matching MQ to help terminate the join. See <https://git.io/vznFH>.
+			var prefixes = [ '-webkit-', '-moz-', '-o-', '-ms-' ];
+			var query = [ '(', prefixes.join( 'touch-enabled),(' ), 'heartz', ')' ].join( '' );
+			return window.matchMedia && window.matchMedia( query ).matches;
+		};
+
+		if ( ( 'ontouchstart' in window ) || ( window.DocumentTouch && document instanceof window.DocumentTouch ) || matchMedia() ) {
+			document.body.classList.add( 'touch-enabled' );
+		}
+	}
+}; // twentytwenty.touchEnabled
+
+/*	-----------------------------------------------------------------------------------------------
+	Cover Modals
+--------------------------------------------------------------------------------------------------- */
+
+twentytwenty.coverModals = {
+
+	init: function() {
+		if ( document.querySelector( '.cover-modal' ) ) {
+			// Handle cover modals when they're toggled
+			this.onToggle();
+
+			// When toggled, untoggle if visitor clicks on the wrapping element of the modal
+			this.outsideUntoggle();
+
+			// Close on escape key press
+			this.closeOnEscape();
+
+			// Hide and show modals before and after their animations have played out
+			this.hideAndShowModals();
+		}
+	},
+
+	// Handle cover modals when they're toggled
+	onToggle: function() {
+		document.querySelectorAll( '.cover-modal' ).forEach( function( element ) {
+			element.addEventListener( 'toggled', function( event ) {
+				var modal = event.target,
+					body = document.body;
+
+				if ( modal.classList.contains( 'active' ) ) {
+					body.classList.add( 'showing-modal' );
+				} else {
+					body.classList.remove( 'showing-modal' );
+					body.classList.add( 'hiding-modal' );
+
+					// Remove the hiding class after a delay, when animations have been run
+					setTimeout( function() {
+						body.classList.remove( 'hiding-modal' );
+					}, 500 );
+				}
+			} );
+		} );
+	},
+
+	// Close modal on outside click
+	outsideUntoggle: function() {
+		document.addEventListener( 'click', function( event ) {
+			var target = event.target;
+			var modal = document.querySelector( '.cover-modal.active' );
+
+			if ( target === modal ) {
+				this.untoggleModal( target );
+			}
+		}.bind( this ) );
+	},
+
+	// Close modal on escape key press
+	closeOnEscape: function() {
+		document.addEventListener( 'keydown', function( event ) {
+			if ( event.keyCode === 27 ) {
+				event.preventDefault();
+				document.querySelectorAll( '.cover-modal.active' ).forEach( function( element ) {
+					this.untoggleModal( element );
+				}.bind( this ) );
+			}
+		}.bind( this ) );
+	},
+
+	// Hide and show modals before and after their animations have played out
+	hideAndShowModals: function() {
+		var _doc = document,
+			_win = window,
+			modals = _doc.querySelectorAll( '.cover-modal' ),
+			htmlStyle = _doc.documentElement.style,
+			adminBar = _doc.querySelector( '#wpadminbar' );
+
+		function getAdminBarHeight( negativeValue ) {
+			var height,
+				currentScroll = _win.pageYOffset;
+
+			if ( adminBar ) {
+				height = currentScroll + adminBar.getBoundingClientRect().height;
+
+				return negativeValue ? -height : height;
+			}
+
+			return currentScroll === 0 ? 0 : -currentScroll;
+		}
+
+		function htmlStyles() {
+			var overflow = _win.innerHeight > _doc.documentElement.getBoundingClientRect().height;
+
+			return {
+				'overflow-y': overflow ? 'hidden' : 'scroll',
+				position: 'fixed',
+				width: '100%',
+				top: getAdminBarHeight( true ) + 'px',
+				left: 0
+			};
+		}
+
+		// Show the modal
+		modals.forEach( function( modal ) {
+			modal.addEventListener( 'toggle-target-before-inactive', function( event ) {
+				var styles = htmlStyles(),
+					offsetY = _win.pageYOffset,
+					paddingTop = ( Math.abs( getAdminBarHeight() ) - offsetY ) + 'px',
+					mQuery = _win.matchMedia( '(max-width: 600px)' );
+
+				if ( event.target !== modal ) {
+					return;
+				}
+
+				Object.keys( styles ).forEach( function( styleKey ) {
+					htmlStyle.setProperty( styleKey, styles[ styleKey ] );
+				} );
+
+				_win.twentytwenty.scrolled = parseInt( styles.top, 10 );
+
+				if ( adminBar ) {
+					_doc.body.style.setProperty( 'padding-top', paddingTop );
+
+					if ( mQuery.matches ) {
+						if ( offsetY >= getAdminBarHeight() ) {
+							modal.style.setProperty( 'top', 0 );
+						} else {
+							modal.style.setProperty( 'top', ( getAdminBarHeight() - offsetY ) + 'px' );
+						}
+					}
+				}
+
+				modal.classList.add( 'show-modal' );
+			} );
+
+			// Hide the modal after a delay, so animations have time to play out
+			modal.addEventListener( 'toggle-target-after-inactive', function( event ) {
+				if ( event.target !== modal ) {
+					return;
+				}
+
+				setTimeout( function() {
+					var clickedEl = twentytwenty.toggles.clickedEl;
+
+					modal.classList.remove( 'show-modal' );
+
+					Object.keys( htmlStyles() ).forEach( function( styleKey ) {
+						htmlStyle.removeProperty( styleKey );
+					} );
+
+					if ( adminBar ) {
+						_doc.body.style.removeProperty( 'padding-top' );
+						modal.style.removeProperty( 'top' );
+					}
+
+					if ( clickedEl !== false ) {
+						clickedEl.focus();
+						clickedEl = false;
+					}
+
+					_win.scrollTo( 0, Math.abs( _win.twentytwenty.scrolled + getAdminBarHeight() ) );
+
+					_win.twentytwenty.scrolled = 0;
+				}, 500 );
+			} );
+		} );
+	},
+
+	// Untoggle a modal
+	untoggleModal: function( modal ) {
+		var modalTargetClass,
+			modalToggle = false;
+
+		// If the modal has specified the string (ID or class) used by toggles to target it, untoggle the toggles with that target string
+		// The modal-target-string must match the string toggles use to target the modal
+		if ( modal.dataset.modalTargetString ) {
+			modalTargetClass = modal.dataset.modalTargetString;
+
+			modalToggle = document.querySelector( '*[data-toggle-target="' + modalTargetClass + '"]' );
+		}
+
+		// If a modal toggle exists, trigger it so all of the toggle options are included
+		if ( modalToggle ) {
+			modalToggle.click();
+
+			// If one doesn't exist, just hide the modal
+		} else {
+			modal.classList.remove( 'active' );
+		}
+	}
+
+}; // twentytwenty.coverModals
+
+/*	-----------------------------------------------------------------------------------------------
+	Intrinsic Ratio Embeds
+--------------------------------------------------------------------------------------------------- */
+
+twentytwenty.intrinsicRatioVideos = {
+
+	init: function() {
+		this.makeFit();
+
+		window.addEventListener( 'resize', function() {
+			this.makeFit();
+		}.bind( this ) );
+	},
+
+	makeFit: function() {
+		document.querySelectorAll( 'iframe, object, video' ).forEach( function( video ) {
+			var ratio, iTargetWidth,
+				container = video.parentNode;
+
+			// Skip videos we want to ignore
+			if ( video.classList.contains( 'intrinsic-ignore' ) || video.parentNode.classList.contains( 'intrinsic-ignore' ) ) {
+				return true;
+			}
+
+			if ( ! video.dataset.origwidth ) {
+				// Get the video element proportions
+				video.setAttribute( 'data-origwidth', video.width );
+				video.setAttribute( 'data-origheight', video.height );
+			}
+
+			iTargetWidth = container.offsetWidth;
+
+			// Get ratio from proportions
+			ratio = iTargetWidth / video.dataset.origwidth;
+
+			// Scale based on ratio, thus retaining proportions
+			video.style.width = iTargetWidth + 'px';
+			video.style.height = ( video.dataset.origheight * ratio ) + 'px';
+		} );
+	}
+
+}; // twentytwenty.instrinsicRatioVideos
+
+/*	-----------------------------------------------------------------------------------------------
+	Modal Menu
+--------------------------------------------------------------------------------------------------- */
+twentytwenty.modalMenu = {
+
+	init: function() {
+		// If the current menu item is in a sub level, expand all the levels higher up on load
+		this.expandLevel();
+		this.keepFocusInModal();
+	},
+
+	expandLevel: function() {
+		var modalMenus = document.querySelectorAll( '.modal-menu' );
+
+		modalMenus.forEach( function( modalMenu ) {
+			var activeMenuItem = modalMenu.querySelector( '.current-menu-item' );
+
+			if ( activeMenuItem ) {
+				twentytwentyFindParents( activeMenuItem, 'li' ).forEach( function( element ) {
+					var subMenuToggle = element.querySelector( '.sub-menu-toggle' );
+					if ( subMenuToggle ) {
+						twentytwenty.toggles.performToggle( subMenuToggle, true );
+					}
+				} );
+			}
+		} );
+	},
+
+	keepFocusInModal: function() {
+		var _doc = document;
+
+		_doc.addEventListener( 'keydown', function( event ) {
+			var toggleTarget, modal, selectors, elements, menuType, bottomMenu, activeEl, lastEl, firstEl, tabKey, shiftKey,
+				clickedEl = twentytwenty.toggles.clickedEl;
+
+			if ( clickedEl && _doc.body.classList.contains( 'showing-modal' ) ) {
+				toggleTarget = clickedEl.dataset.toggleTarget;
+				selectors = 'input, a, button';
+				modal = _doc.querySelector( toggleTarget );
+
+				elements = modal.querySelectorAll( selectors );
+				elements = Array.prototype.slice.call( elements );
+
+				if ( '.menu-modal' === toggleTarget ) {
+					menuType = window.matchMedia( '(min-width: 1000px)' ).matches;
+					menuType = menuType ? '.expanded-menu' : '.mobile-menu';
+
+					elements = elements.filter( function( element ) {
+						return null !== element.closest( menuType ) && null !== element.offsetParent;
+					} );
+
+					elements.unshift( _doc.querySelector( '.close-nav-toggle' ) );
+
+					bottomMenu = _doc.querySelector( '.menu-bottom > nav' );
+
+					if ( bottomMenu ) {
+						bottomMenu.querySelectorAll( selectors ).forEach( function( element ) {
+							elements.push( element );
+						} );
+					}
+				}
+
+				lastEl = elements[ elements.length - 1 ];
+				firstEl = elements[0];
+				activeEl = _doc.activeElement;
+				tabKey = event.keyCode === 9;
+				shiftKey = event.shiftKey;
+
+				if ( ! shiftKey && tabKey && lastEl === activeEl ) {
+					event.preventDefault();
+					firstEl.focus();
+				}
+
+				if ( shiftKey && tabKey && firstEl === activeEl ) {
+					event.preventDefault();
+					lastEl.focus();
+				}
+			}
+		} );
+	}
+}; // twentytwenty.modalMenu
+
+/*	-----------------------------------------------------------------------------------------------
+	Primary Menu
+--------------------------------------------------------------------------------------------------- */
+
+twentytwenty.primaryMenu = {
+
+	init: function() {
+		this.focusMenuWithChildren();
+	},
+
+	// The focusMenuWithChildren() function implements Keyboard Navigation in the Primary Menu
+	// by adding the '.focus' class to all 'li.menu-item-has-children' when the focus is on the 'a' element.
+	focusMenuWithChildren: function() {
+		// Get all the link elements within the primary menu.
+		var links, i, len,
+			menu = document.querySelector( '.primary-menu-wrapper' );
+
+		if ( ! menu ) {
+			return false;
+		}
+
+		links = menu.getElementsByTagName( 'a' );
+
+		// Each time a menu link is focused or blurred, toggle focus.
+		for ( i = 0, len = links.length; i < len; i++ ) {
+			links[i].addEventListener( 'focus', toggleFocus, true );
+			links[i].addEventListener( 'blur', toggleFocus, true );
+		}
+
+		//Sets or removes the .focus class on an element.
+		function toggleFocus() {
+			var self = this;
+
+			// Move up through the ancestors of the current link until we hit .primary-menu.
+			while ( -1 === self.className.indexOf( 'primary-menu' ) ) {
+				// On li elements toggle the class .focus.
+				if ( 'li' === self.tagName.toLowerCase() ) {
+					if ( -1 !== self.className.indexOf( 'focus' ) ) {
+						self.className = self.className.replace( ' focus', '' );
+					} else {
+						self.className += ' focus';
+					}
+				}
+				self = self.parentElement;
+			}
+		}
+	}
+}; // twentytwenty.primaryMenu
+
+/*	-----------------------------------------------------------------------------------------------
+	Toggles
+--------------------------------------------------------------------------------------------------- */
+
+twentytwenty.toggles = {
+
+	clickedEl: false,
+
+	init: function() {
+		// Do the toggle
+		this.toggle();
+
+		// Check for toggle/untoggle on resize
+		this.resizeCheck();
+
+		// Check for untoggle on escape key press
+		this.untoggleOnEscapeKeyPress();
+	},
+
+	performToggle: function( element, instantly ) {
+		var target, timeOutTime, classToToggle,
+			self = this,
+			_doc = document,
+			// Get our targets
+			toggle = element,
+			targetString = toggle.dataset.toggleTarget,
+			activeClass = 'active';
+
+		// Elements to focus after modals are closed
+		if ( ! _doc.querySelectorAll( '.show-modal' ).length ) {
+			self.clickedEl = _doc.activeElement;
+		}
+
+		if ( targetString === 'next' ) {
+			target = toggle.nextSibling;
+		} else {
+			target = _doc.querySelector( targetString );
+		}
+
+		// Trigger events on the toggle targets before they are toggled
+		if ( target.classList.contains( activeClass ) ) {
+			target.dispatchEvent( twentytwenty.createEvent( 'toggle-target-before-active' ) );
+		} else {
+			target.dispatchEvent( twentytwenty.createEvent( 'toggle-target-before-inactive' ) );
+		}
+
+		// Get the class to toggle, if specified
+		classToToggle = toggle.dataset.classToToggle ? toggle.dataset.classToToggle : activeClass;
+
+		// For cover modals, set a short timeout duration so the class animations have time to play out
+		timeOutTime = 0;
+
+		if ( target.classList.contains( 'cover-modal' ) ) {
+			timeOutTime = 10;
+		}
+
+		setTimeout( function() {
+			var focusElement,
+				subMenued = target.classList.contains( 'sub-menu' ),
+				newTarget = subMenued ? toggle.closest( '.menu-item' ).querySelector( '.sub-menu' ) : target,
+				duration = toggle.dataset.toggleDuration;
+
+			// Toggle the target of the clicked toggle
+			if ( toggle.dataset.toggleType === 'slidetoggle' && ! instantly && duration !== '0' ) {
+				twentytwentyMenuToggle( newTarget, duration );
+			} else {
+				newTarget.classList.toggle( classToToggle );
+			}
+
+			// If the toggle target is 'next', only give the clicked toggle the active class
+			if ( targetString === 'next' ) {
+				toggle.classList.toggle( activeClass );
+			} else if ( target.classList.contains( 'sub-menu' ) ) {
+				toggle.classList.toggle( activeClass );
+			} else {
+				// If not, toggle all toggles with this toggle target
+				_doc.querySelector( '*[data-toggle-target="' + targetString + '"]' ).classList.toggle( activeClass );
+			}
+
+			// Toggle aria-expanded on the toggle
+			twentytwentyToggleAttribute( toggle, 'aria-expanded', 'true', 'false' );
+
+			if ( self.clickedEl && -1 !== toggle.getAttribute( 'class' ).indexOf( 'close-' ) ) {
+				twentytwentyToggleAttribute( self.clickedEl, 'aria-expanded', 'true', 'false' );
+			}
+
+			// Toggle body class
+			if ( toggle.dataset.toggleBodyClass ) {
+				_doc.body.classList.toggle( toggle.dataset.toggleBodyClass );
+			}
+
+			// Check whether to set focus
+			if ( toggle.dataset.setFocus ) {
+				focusElement = _doc.querySelector( toggle.dataset.setFocus );
+
+				if ( focusElement ) {
+					if ( target.classList.contains( activeClass ) ) {
+						focusElement.focus();
+					} else {
+						focusElement.blur();
+					}
+				}
+			}
+
+			// Trigger the toggled event on the toggle target
+			target.dispatchEvent( twentytwenty.createEvent( 'toggled' ) );
+
+			// Trigger events on the toggle targets after they are toggled
+			if ( target.classList.contains( activeClass ) ) {
+				target.dispatchEvent( twentytwenty.createEvent( 'toggle-target-after-active' ) );
+			} else {
+				target.dispatchEvent( twentytwenty.createEvent( 'toggle-target-after-inactive' ) );
+			}
+		}, timeOutTime );
+	},
+
+	// Do the toggle
+	toggle: function() {
+		var self = this;
+
+		document.querySelectorAll( '*[data-toggle-target]' ).forEach( function( element ) {
+			element.addEventListener( 'click', function( event ) {
+				event.preventDefault();
+				self.performToggle( element );
+			} );
+		} );
+	},
+
+	// Check for toggle/untoggle on screen resize
+	resizeCheck: function() {
+		if ( document.querySelectorAll( '*[data-untoggle-above], *[data-untoggle-below], *[data-toggle-above], *[data-toggle-below]' ).length ) {
+			window.addEventListener( 'resize', function() {
+				var winWidth = window.innerWidth,
+					toggles = document.querySelectorAll( '.toggle' );
+
+				toggles.forEach( function( toggle ) {
+					var unToggleAbove = toggle.dataset.untoggleAbove,
+						unToggleBelow = toggle.dataset.untoggleBelow,
+						toggleAbove = toggle.dataset.toggleAbove,
+						toggleBelow = toggle.dataset.toggleBelow;
+
+					// If no width comparison is set, continue
+					if ( ! unToggleAbove && ! unToggleBelow && ! toggleAbove && ! toggleBelow ) {
+						return;
+					}
+
+					// If the toggle width comparison is true, toggle the toggle
+					if (
+						( ( ( unToggleAbove && winWidth > unToggleAbove ) ||
+							( unToggleBelow && winWidth < unToggleBelow ) ) &&
+							toggle.classList.contains( 'active' ) ) ||
+						( ( ( toggleAbove && winWidth > toggleAbove ) ||
+							( toggleBelow && winWidth < toggleBelow ) ) &&
+							! toggle.classList.contains( 'active' ) )
+					) {
+						toggle.click();
+					}
+				} );
+			} );
+		}
+	},
+
+	// Close toggle on escape key press
+	untoggleOnEscapeKeyPress: function() {
+		document.addEventListener( 'keyup', function( event ) {
+			if ( event.key === 'Escape' ) {
+				document.querySelectorAll( '*[data-untoggle-on-escape].active' ).forEach( function( element ) {
+					if ( element.classList.contains( 'active' ) ) {
+						element.click();
+					}
+				} );
+			}
+		} );
+	}
+
+}; // twentytwenty.toggles
+
+/**
+ * Is the DOM ready
+ *
+ * this implementation is coming from https://gomakethings.com/a-native-javascript-equivalent-of-jquerys-ready-method/
+ *
+ * @param {Function} fn Callback function to run.
+ */
+function twentytwentyDomReady( fn ) {
+	if ( typeof fn !== 'function' ) {
+		return;
+	}
+
+	if ( document.readyState === 'interactive' || document.readyState === 'complete' ) {
+		return fn();
+	}
+
+	document.addEventListener( 'DOMContentLoaded', fn, false );
+}
+
+twentytwentyDomReady( function() {
+	twentytwenty.toggles.init();	// Handle toggles
+	twentytwenty.coverModals.init();	// Handle cover modals
+	twentytwenty.intrinsicRatioVideos.init();	// Retain aspect ratio of videos on window resize
+	twentytwenty.modalMenu.init();	// Modal Menu
+	twentytwenty.primaryMenu.init();	// Primary Menu
+	twentytwenty.touchEnabled.init();	// Add class to body if device is touch-enabled
+} );
+
+/*	-----------------------------------------------------------------------------------------------
+	Helper functions
+--------------------------------------------------------------------------------------------------- */
+
+/* Toggle an attribute ----------------------- */
+
+function twentytwentyToggleAttribute( element, attribute, trueVal, falseVal ) {
+	if ( trueVal === undefined ) {
+		trueVal = true;
+	}
+	if ( falseVal === undefined ) {
+		falseVal = false;
+	}
+	if ( element.getAttribute( attribute ) !== trueVal ) {
+		element.setAttribute( attribute, trueVal );
+	} else {
+		element.setAttribute( attribute, falseVal );
+	}
+}
+
+/**
+ * Toggle a menu item on or off.
+ *
+ * @param {HTMLElement} target
+ * @param {number} duration
+ */
+function twentytwentyMenuToggle( target, duration ) {
+	var initialParentHeight, finalParentHeight, menu, menuItems, transitionListener,
+		initialPositions = [],
+		finalPositions = [];
+
+	if ( ! target ) {
+		return;
+	}
+
+	menu = target.closest( '.menu-wrapper' );
+
+	// Step 1: look at the initial positions of every menu item.
+	menuItems = menu.querySelectorAll( '.menu-item' );
+
+	menuItems.forEach( function( menuItem, index ) {
+		initialPositions[ index ] = { x: menuItem.offsetLeft, y: menuItem.offsetTop };
+	} );
+	initialParentHeight = target.parentElement.offsetHeight;
+
+	target.classList.add( 'toggling-target' );
+
+	// Step 2: toggle target menu item and look at the final positions of every menu item.
+	target.classList.toggle( 'active' );
+
+	menuItems.forEach( function( menuItem, index ) {
+		finalPositions[ index ] = { x: menuItem.offsetLeft, y: menuItem.offsetTop };
+	} );
+	finalParentHeight = target.parentElement.offsetHeight;
+
+	// Step 3: close target menu item again.
+	// The whole process happens without giving the browser a chance to render, so it's invisible.
+	target.classList.toggle( 'active' );
+
+	// Step 4: prepare animation.
+	// Position all the items with absolute offsets, at the same starting position.
+	// Shouldn't result in any visual changes if done right.
+	menu.classList.add( 'is-toggling' );
+	target.classList.toggle( 'active' );
+	menuItems.forEach( function( menuItem, index ) {
+		var initialPosition = initialPositions[ index ];
+		if ( initialPosition.y === 0 && menuItem.parentElement === target ) {
+			initialPosition.y = initialParentHeight;
+		}
+		menuItem.style.transform = 'translate(' + initialPosition.x + 'px, ' + initialPosition.y + 'px)';
+	} );
+
+	// The double rAF is unfortunately needed, since we're toggling CSS classes, and
+	// the only way to ensure layout completion here across browsers is to wait twice.
+	// This just delays the start of the animation by 2 frames and is thus not an issue.
+	requestAnimationFrame( function() {
+		requestAnimationFrame( function() {
+			// Step 5: start animation by moving everything to final position.
+			// All the layout work has already happened, while we were preparing for the animation.
+			// The animation now runs entirely in CSS, using cheap CSS properties (opacity and transform)
+			// that don't trigger the layout or paint stages.
+			menu.classList.add( 'is-animating' );
+			menuItems.forEach( function( menuItem, index ) {
+				var finalPosition = finalPositions[ index ];
+				if ( finalPosition.y === 0 && menuItem.parentElement === target ) {
+					finalPosition.y = finalParentHeight;
+				}
+				if ( duration !== undefined ) {
+					menuItem.style.transitionDuration = duration + 'ms';
+				}
+				menuItem.style.transform = 'translate(' + finalPosition.x + 'px, ' + finalPosition.y + 'px)';
+			} );
+			if ( duration !== undefined ) {
+				target.style.transitionDuration = duration + 'ms';
+			}
+		} );
+
+		// Step 6: finish toggling.
+		// Remove all transient classes when the animation ends.
+		transitionListener = function() {
+			menu.classList.remove( 'is-animating' );
+			menu.classList.remove( 'is-toggling' );
+			target.classList.remove( 'toggling-target' );
+			menuItems.forEach( function( menuItem ) {
+				menuItem.style.transform = '';
+				menuItem.style.transitionDuration = '';
+			} );
+			target.style.transitionDuration = '';
+			target.removeEventListener( 'transitionend', transitionListener );
+		};
+
+		target.addEventListener( 'transitionend', transitionListener );
+	} );
+}
+
+/**
+ * traverses the DOM up to find elements matching the query
+ *
+ * @param {HTMLElement} target
+ * @param {string} query
+ * @return {NodeList} parents matching query
+ */
+function twentytwentyFindParents( target, query ) {
+	var parents = [];
+
+	// recursively go up the DOM adding matches to the parents array
+	function traverse( item ) {
+		var parent = item.parentNode;
+		if ( parent instanceof HTMLElement ) {
+			if ( parent.matches( query ) ) {
+				parents.push( parent );
+			}
+			traverse( parent );
+		}
+	}
+
+	traverse( target );
+
+	return parents;
+}