mirror of
https://github.com/WordPress/WordPress.git
synced 2024-11-04 09:49:37 +01:00
b5cc5b37f7
This brings trunk’s version of Twenty Twenty in-sync with GitHub.
For a complete list of changes since [46571], see 4549fd9...dea9290.
Props anlino, ianbelanger, poena, williampatton, collet, erikkroes, torres126, intimez, byalextran, mehidi258, swapnild, nielslange.
Fixes #48450.
Built from https://develop.svn.wordpress.org/trunk@46613
git-svn-id: http://core.svn.wordpress.org/trunk@46410 1a063a9b-81f0-0310-95a4-ce76da25c4cd
920 lines
28 KiB
JavaScript
920 lines
28 KiB
JavaScript
/* -----------------------------------------------------------------------------------------------
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Namespace
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--------------------------------------------------------------------------------------------------- */
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var twentytwenty = twentytwenty || {};
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// Set a default value for scrolled.
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twentytwenty.scrolled = 0;
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// polyfill closest
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// https://developer.mozilla.org/en-US/docs/Web/API/Element/closest#Polyfill
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if ( ! Element.prototype.closest ) {
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Element.prototype.closest = function( s ) {
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var el = this;
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do {
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if ( el.matches( s ) ) {
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return el;
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}
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el = el.parentElement || el.parentNode;
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} while ( el !== null && el.nodeType === 1 );
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return null;
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};
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}
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// polyfill forEach
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// https://developer.mozilla.org/en-US/docs/Web/API/NodeList/forEach#Polyfill
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if ( window.NodeList && ! NodeList.prototype.forEach ) {
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NodeList.prototype.forEach = function( callback, thisArg ) {
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var i;
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thisArg = thisArg || window;
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for ( i = 0; i < this.length; i++ ) {
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callback.call( thisArg, this[ i ], i, this );
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}
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};
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}
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// event "polyfill"
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twentytwenty.createEvent = function( eventName ) {
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var event;
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if ( typeof window.Event === 'function' ) {
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event = new Event( eventName );
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} else {
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event = document.createEvent( 'Event' );
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event.initEvent( eventName, true, false );
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}
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return event;
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};
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// matches "polyfill"
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// https://developer.mozilla.org/es/docs/Web/API/Element/matches
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if ( ! Element.prototype.matches ) {
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Element.prototype.matches =
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Element.prototype.matchesSelector ||
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Element.prototype.mozMatchesSelector ||
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Element.prototype.msMatchesSelector ||
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Element.prototype.oMatchesSelector ||
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Element.prototype.webkitMatchesSelector ||
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function( s ) {
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var matches = ( this.document || this.ownerDocument ).querySelectorAll( s ),
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i = matches.length;
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while ( --i >= 0 && matches.item( i ) !== this ) {}
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return i > -1;
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};
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}
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/* -----------------------------------------------------------------------------------------------
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Cover Modals
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--------------------------------------------------------------------------------------------------- */
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twentytwenty.coverModals = {
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init: function() {
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if ( document.querySelector( '.cover-modal' ) ) {
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// Handle cover modals when they're toggled
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this.onToggle();
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// When toggled, untoggle if visitor clicks on the wrapping element of the modal
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this.outsideUntoggle();
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// Close on escape key press
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this.closeOnEscape();
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// Hide and show modals before and after their animations have played out
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this.hideAndShowModals();
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}
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},
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// Handle cover modals when they're toggled
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onToggle: function() {
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document.querySelectorAll( '.cover-modal' ).forEach( function( element ) {
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element.addEventListener( 'toggled', function( event ) {
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var modal = event.target,
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body = document.body;
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if ( modal.classList.contains( 'active' ) ) {
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body.classList.add( 'showing-modal' );
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} else {
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body.classList.remove( 'showing-modal' );
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body.classList.add( 'hiding-modal' );
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// Remove the hiding class after a delay, when animations have been run
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setTimeout( function() {
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body.classList.remove( 'hiding-modal' );
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}, 500 );
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}
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} );
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} );
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},
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// Close modal on outside click
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outsideUntoggle: function() {
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document.addEventListener( 'click', function( event ) {
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var target = event.target;
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var modal = document.querySelector( '.cover-modal.active' );
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if ( target === modal ) {
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this.untoggleModal( target );
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}
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}.bind( this ) );
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},
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// Close modal on escape key press
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closeOnEscape: function() {
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document.addEventListener( 'keydown', function( event ) {
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if ( event.keyCode === 27 ) {
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event.preventDefault();
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document.querySelectorAll( '.cover-modal.active' ).forEach( function( element ) {
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this.untoggleModal( element );
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}.bind( this ) );
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}
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}.bind( this ) );
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},
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// Hide and show modals before and after their animations have played out
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hideAndShowModals: function() {
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var _doc = document,
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_win = window,
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modals = _doc.querySelectorAll( '.cover-modal' ),
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htmlStyle = _doc.documentElement.style,
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adminBar = _doc.querySelector( '#wpadminbar' );
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function getAdminBarHeight( negativeValue ) {
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var height,
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currentScroll = _win.pageYOffset;
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if ( adminBar ) {
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height = currentScroll + adminBar.getBoundingClientRect().height;
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return negativeValue ? -height : height;
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}
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return currentScroll === 0 ? 0 : -currentScroll;
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}
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function htmlStyles() {
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var overflow = _win.innerHeight > _doc.documentElement.getBoundingClientRect().height;
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return {
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'overflow-y': overflow ? 'hidden' : 'scroll',
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position: 'fixed',
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width: '100%',
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top: getAdminBarHeight( true ) + 'px',
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left: 0
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};
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}
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// Show the modal
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modals.forEach( function( modal ) {
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modal.addEventListener( 'toggle-target-before-inactive', function( event ) {
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var styles = htmlStyles(),
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offsetY = _win.pageYOffset,
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paddingTop = ( Math.abs( getAdminBarHeight() ) - offsetY ) + 'px',
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mQuery = _win.matchMedia( '(max-width: 600px)' );
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if ( event.target !== modal ) {
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return;
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}
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Object.keys( styles ).forEach( function( styleKey ) {
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htmlStyle.setProperty( styleKey, styles[ styleKey ] );
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} );
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_win.twentytwenty.scrolled = parseInt( styles.top, 10 );
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if ( adminBar ) {
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_doc.body.style.setProperty( 'padding-top', paddingTop );
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if ( mQuery.matches ) {
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if ( offsetY >= getAdminBarHeight() ) {
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modal.style.setProperty( 'top', 0 );
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} else {
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modal.style.setProperty( 'top', ( getAdminBarHeight() - offsetY ) + 'px' );
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}
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}
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}
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modal.classList.add( 'show-modal' );
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} );
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// Hide the modal after a delay, so animations have time to play out
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modal.addEventListener( 'toggle-target-after-inactive', function( event ) {
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if ( event.target !== modal ) {
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return;
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}
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setTimeout( function() {
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var clickedEl = twentytwenty.toggles.clickedEl;
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modal.classList.remove( 'show-modal' );
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Object.keys( htmlStyles() ).forEach( function( styleKey ) {
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htmlStyle.removeProperty( styleKey );
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} );
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if ( adminBar ) {
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_doc.body.style.removeProperty( 'padding-top' );
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modal.style.removeProperty( 'top' );
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}
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if ( clickedEl !== false ) {
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clickedEl.focus();
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clickedEl = false;
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}
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_win.scrollTo( 0, Math.abs( _win.twentytwenty.scrolled + getAdminBarHeight() ) );
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_win.twentytwenty.scrolled = 0;
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}, 500 );
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} );
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} );
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},
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// Untoggle a modal
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untoggleModal: function( modal ) {
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var modalTargetClass,
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modalToggle = false;
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// If the modal has specified the string (ID or class) used by toggles to target it, untoggle the toggles with that target string
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// The modal-target-string must match the string toggles use to target the modal
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if ( modal.dataset.modalTargetString ) {
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modalTargetClass = modal.dataset.modalTargetString;
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modalToggle = document.querySelector( '*[data-toggle-target="' + modalTargetClass + '"]' );
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}
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// If a modal toggle exists, trigger it so all of the toggle options are included
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if ( modalToggle ) {
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modalToggle.click();
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// If one doesn't exist, just hide the modal
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} else {
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modal.classList.remove( 'active' );
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}
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}
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}; // twentytwenty.coverModals
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/* -----------------------------------------------------------------------------------------------
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Intrinsic Ratio Embeds
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--------------------------------------------------------------------------------------------------- */
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twentytwenty.intrinsicRatioVideos = {
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init: function() {
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this.makeFit();
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window.addEventListener( 'resize', function() {
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this.makeFit();
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}.bind( this ) );
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},
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makeFit: function() {
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document.querySelectorAll( 'iframe, object, video' ).forEach( function( video ) {
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var ratio, iTargetWidth,
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container = video.parentNode;
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// Skip videos we want to ignore
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if ( video.classList.contains( 'intrinsic-ignore' ) || video.parentNode.classList.contains( 'intrinsic-ignore' ) ) {
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return true;
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}
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if ( ! video.dataset.origwidth ) {
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// Get the video element proportions
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video.setAttribute( 'data-origwidth', video.width );
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video.setAttribute( 'data-origheight', video.height );
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}
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iTargetWidth = container.offsetWidth;
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// Get ratio from proportions
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ratio = iTargetWidth / video.dataset.origwidth;
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// Scale based on ratio, thus retaining proportions
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video.style.width = iTargetWidth + 'px';
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video.style.height = ( video.dataset.origheight * ratio ) + 'px';
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} );
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}
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}; // twentytwenty.instrinsicRatioVideos
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/* -----------------------------------------------------------------------------------------------
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Smooth Scroll
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--------------------------------------------------------------------------------------------------- */
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twentytwenty.smoothScroll = {
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init: function() {
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// Scroll to anchor
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this.scrollToAnchor();
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// Scroll to element
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this.scrollToElement();
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},
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// Scroll to anchor
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scrollToAnchor: function() {
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var anchorElements = document.querySelectorAll( 'a[href*="#"]' );
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var anchorElementsList = Array.prototype.slice.call( anchorElements );
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anchorElementsList.filter( function( element ) {
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if ( element.href === '#' || element.href === '#0' || element.id === 'cancel-comment-reply-link' || element.classList.contains( 'do-not-scroll' ) || element.classList.contains( 'skip-link' ) ) {
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return false;
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}
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return true;
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} ).forEach( function( element ) {
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element.addEventListener( 'click', function( event ) {
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var target, scrollOffset, originalOffset, adminBar, scrollSpeed, additionalOffset;
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// On-page links
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if ( window.location.hostname === event.target.hostname ) {
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// Figure out element to scroll to
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target = window.location.hash !== '' && document.querySelector( window.location.hash );
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target = target ? target : event.target.hash !== '' && document.querySelector( event.target.hash );
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// Does a scroll target exist?
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if ( target ) {
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// Only prevent default if animation is actually gonna happen
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event.preventDefault();
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// Get options
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additionalOffset = event.target.dataset.additionalOffset;
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scrollSpeed = event.target.dataset.scrollSpeed ? event.target.dataset.scrollSpeed : 500;
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// Determine offset
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adminBar = document.querySelector( '#wpadminbar' );
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originalOffset = target.getBoundingClientRect().top + window.pageYOffset;
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scrollOffset = additionalOffset ? originalOffset + additionalOffset : originalOffset;
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if ( adminBar && event.target.className === 'to-the-top' ) {
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scrollOffset = scrollOffset - adminBar.getBoundingClientRect().height;
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}
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twentytwentyScrollTo( scrollOffset, null, scrollSpeed );
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window.location.hash = event.target.hash.slice( 1 );
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}
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}
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} );
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} );
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},
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// Scroll to element
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scrollToElement: function() {
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var scrollToElement = document.querySelector( '*[data-scroll-to]' );
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if ( scrollToElement ) {
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scrollToElement.addEventListener( 'click', function( event ) {
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var originalOffset, additionalOffset, scrollOffset, scrollSpeed,
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// Figure out element to scroll to
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target = event.target.dataset.twentytwentyScrollTo;
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// Make sure said element exists
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if ( target ) {
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event.preventDefault();
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// Get options
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additionalOffset = event.target.dataset.additionalOffset;
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scrollSpeed = event.target.dataset.scrollSpeed ? event.target.dataset.scrollSpeed : 500;
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// Determine offset
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originalOffset = target.getBoundingClientRect().top + window.pageYOffset;
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scrollOffset = additionalOffset ? originalOffset + additionalOffset : originalOffset;
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twentytwentyScrollTo( scrollOffset, null, scrollSpeed );
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}
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} );
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}
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}
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}; // twentytwenty.smoothScroll
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/* -----------------------------------------------------------------------------------------------
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Modal Menu
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--------------------------------------------------------------------------------------------------- */
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twentytwenty.modalMenu = {
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init: function() {
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// If the current menu item is in a sub level, expand all the levels higher up on load
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this.expandLevel();
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this.keepFocusInModal();
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},
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expandLevel: function() {
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var modalMenus = document.querySelectorAll( '.modal-menu' );
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modalMenus.forEach( function( modalMenu ) {
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var activeMenuItem = modalMenu.querySelector( '.current-menu-item' );
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if ( activeMenuItem ) {
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twentytwentyFindParents( activeMenuItem, 'li' ).forEach( function( element ) {
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var subMenuToggle = element.querySelector( '.sub-menu-toggle' );
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if ( subMenuToggle ) {
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twentytwenty.toggles.performToggle( subMenuToggle, true );
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}
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} );
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}
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} );
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},
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keepFocusInModal: function() {
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var _doc = document;
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_doc.addEventListener( 'keydown', function( event ) {
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var toggleTarget, modal, selectors, elements, menuType, bottomMenu, activeEl, lastEl, firstEl, tabKey, shiftKey,
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clickedEl = twentytwenty.toggles.clickedEl;
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if ( clickedEl && _doc.body.classList.contains( 'showing-modal' ) ) {
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toggleTarget = clickedEl.dataset.toggleTarget;
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selectors = 'input, a, button';
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modal = _doc.querySelector( toggleTarget );
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elements = modal.querySelectorAll( selectors );
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elements = Array.prototype.slice.call( elements );
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if ( '.menu-modal' === toggleTarget ) {
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menuType = window.matchMedia( '(min-width: 1000px)' ).matches;
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menuType = menuType ? '.expanded-menu' : '.mobile-menu';
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elements = elements.filter( function( element ) {
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return null !== element.closest( menuType ) && null !== element.offsetParent;
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} );
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elements.unshift( _doc.querySelector( '.close-nav-toggle' ) );
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bottomMenu = _doc.querySelector( '.menu-bottom > nav' );
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if ( bottomMenu ) {
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bottomMenu.querySelectorAll( selectors ).forEach( function( element ) {
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elements.push( element );
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} );
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}
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}
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lastEl = elements[ elements.length - 1 ];
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firstEl = elements[0];
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activeEl = _doc.activeElement;
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tabKey = event.keyCode === 9;
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shiftKey = event.shiftKey;
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if ( ! shiftKey && tabKey && lastEl === activeEl ) {
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event.preventDefault();
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firstEl.focus();
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}
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if ( shiftKey && tabKey && firstEl === activeEl ) {
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event.preventDefault();
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lastEl.focus();
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}
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}
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} );
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}
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}; // twentytwenty.modalMenu
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/* -----------------------------------------------------------------------------------------------
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Primary Menu
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--------------------------------------------------------------------------------------------------- */
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twentytwenty.primaryMenu = {
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init: function() {
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this.focusMenuWithChildren();
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},
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// The focusMenuWithChildren() function implements Keyboard Navigation in the Primary Menu
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// by adding the '.focus' class to all 'li.menu-item-has-children' when the focus is on the 'a' element.
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focusMenuWithChildren: function() {
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// Get all the link elements within the primary menu.
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var links, i, len,
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menu = document.querySelector( '.primary-menu-wrapper' );
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if ( ! menu ) {
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return false;
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}
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links = menu.getElementsByTagName( 'a' );
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// Each time a menu link is focused or blurred, toggle focus.
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for ( i = 0, len = links.length; i < len; i++ ) {
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links[i].addEventListener( 'focus', toggleFocus, true );
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links[i].addEventListener( 'blur', toggleFocus, true );
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}
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//Sets or removes the .focus class on an element.
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function toggleFocus() {
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var self = this;
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// Move up through the ancestors of the current link until we hit .primary-menu.
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while ( -1 === self.className.indexOf( 'primary-menu' ) ) {
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// On li elements toggle the class .focus.
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if ( 'li' === self.tagName.toLowerCase() ) {
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if ( -1 !== self.className.indexOf( 'focus' ) ) {
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self.className = self.className.replace( ' focus', '' );
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} else {
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self.className += ' focus';
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}
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}
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self = self.parentElement;
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}
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}
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}
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}; // twentytwenty.primaryMenu
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/* -----------------------------------------------------------------------------------------------
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Toggles
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--------------------------------------------------------------------------------------------------- */
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twentytwenty.toggles = {
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clickedEl: false,
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init: function() {
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// Do the toggle
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this.toggle();
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// Check for toggle/untoggle on resize
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this.resizeCheck();
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// Check for untoggle on escape key press
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this.untoggleOnEscapeKeyPress();
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},
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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.smoothScroll.init(); // Smooth scroll to anchor link or a specific element
|
|
twentytwenty.modalMenu.init(); // Modal Menu
|
|
twentytwenty.primaryMenu.init(); // Primary Menu
|
|
} );
|
|
|
|
/* -----------------------------------------------------------------------------------------------
|
|
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;
|
|
}
|
|
|
|
// twentytwentyEaseInOutQuad functions http://goo.gl/5HLl8
|
|
function twentytwentyEaseInOutQuad( t, b, c, d ) {
|
|
t /= d / 2;
|
|
if ( t < 1 ) {
|
|
return ( ( ( c / 2 ) * t ) * t ) + b;
|
|
}
|
|
t--;
|
|
return ( ( -c / 2 ) * ( ( t * ( t - 2 ) ) - 1 ) ) + b;
|
|
}
|
|
|
|
function twentytwentyScrollTo( to, callback, duration ) {
|
|
var start, change, increment, currentTime;
|
|
|
|
function move( amount ) {
|
|
document.documentElement.scrollTop = amount;
|
|
document.body.parentNode.scrollTop = amount;
|
|
document.body.scrollTop = amount;
|
|
}
|
|
|
|
start = document.documentElement.scrollTop || document.body.parentNode.scrollTop || document.body.scrollTop;
|
|
change = to - start;
|
|
increment = 20;
|
|
currentTime = 0;
|
|
|
|
duration = ( typeof ( duration ) === 'undefined' ) ? 500 : duration;
|
|
|
|
function animateScroll() {
|
|
var val;
|
|
|
|
// increment the time
|
|
currentTime += increment;
|
|
// find the value with the quadratic in-out twentytwentyEaseInOutQuad function
|
|
val = twentytwentyEaseInOutQuad( currentTime, start, change, duration );
|
|
// move the document.body
|
|
move( val );
|
|
// do the animation unless its over
|
|
if ( currentTime < duration ) {
|
|
window.requestAnimationFrame( animateScroll );
|
|
} else if ( callback && typeof ( callback ) === 'function' ) {
|
|
// the animation is done so lets callback
|
|
callback();
|
|
}
|
|
}
|
|
animateScroll();
|
|
}
|