948 lines
33 KiB
JavaScript
948 lines
33 KiB
JavaScript
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(function(root, factory) {
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if (typeof define === 'function' && define.amd) {
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define(factory);
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} else if (typeof exports === 'object') {
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module.exports = factory(require, exports, module);
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} else {
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root.ScrollReveal = factory();
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}
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}(this, function(require, exports, module) {
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///// ///// ///// /////
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///// /////
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///// /////
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/**
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* ScrollReveal
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* ------------
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* Version : 3.1.4
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* Website : scrollrevealjs.org
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* Repo : github.com/jlmakes/scrollreveal.js
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* Author : Julian Lloyd (@jlmakes)
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*/
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;(function() {
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'use strict';
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var
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sr,
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Tools,
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_requestAnimationFrame;
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this.ScrollReveal = (function() {
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/**
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* Configuration
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* -------------
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* This object signature can be passed directly to the ScrollReveal constructor,
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* or as the second argument of the `reveal()` method.
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*/
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ScrollReveal.prototype.defaults = {
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// 'bottom', 'left', 'top', 'right'
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origin : 'bottom',
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// Can be any valid CSS distance, e.g. '5rem', '10%', '20vw', etc.
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distance : '20px',
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// Time in milliseconds.
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duration : 500,
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delay : 0,
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// Starting angles in degrees, will transition from these values to 0 in all axes.
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rotate : { x: 0, y: 0, z: 0 },
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// Starting opacity value, before transitioning to the computed opacity.
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opacity : 0,
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// Starting scale value, will transition from this value to 1
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scale : 0.9,
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// Accepts any valid CSS easing, e.g. 'ease', 'ease-in-out', 'linear', etc.
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easing : 'cubic-bezier(0.6, 0.2, 0.1, 1)',
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// When null, `<html>` is assumed to be the reveal container. You can pass a
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// DOM node as a custom container, e.g. document.querySelector('.fooContainer')
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// or a selector, e.g. '.fooContainer'
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container : null,
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// true/false to control reveal animations on mobile.
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mobile : true,
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// true: reveals occur every time elements become visible
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// false: reveals occur once as elements become visible
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reset : false,
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// 'always' — delay for all reveal animations
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// 'once' — delay only the first time reveals occur
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// 'onload' - delay only for animations triggered by first load
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useDelay : 'always',
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// Change when an element is considered in the viewport. The default value
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// of 0.20 means 20% of an element must be visible for its reveal to occur.
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viewFactor : 0.2,
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// Pixel values that alter the container boundaries.
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// e.g. Set `{ top: 48 }`, if you have a 48px tall fixed toolbar.
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// --
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// Visual Aid: https://scrollrevealjs.org/assets/viewoffset.png
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viewOffset : { top: 0, right: 0, bottom: 0, left: 0 },
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// Callbacks that fire for each completed element reveal, and if
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// `config.reset = true`, for each completed element reset. When creating your
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// callbacks, remember they are passed the element’s DOM node that triggered
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// it as the first argument.
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afterReveal : function(domEl) {},
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afterReset : function(domEl) {}
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};
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function ScrollReveal(config) {
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// Support instantiation without the `new` keyword.
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if (typeof this == 'undefined' || Object.getPrototypeOf(this) !== ScrollReveal.prototype) {
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return new ScrollReveal(config)
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}
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sr = this; // Save reference to instance.
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sr.tools = new Tools(); // *required utilities
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if (sr.isSupported()) {
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sr.tools.extend(sr.defaults, config || {});
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_resolveContainer(sr.defaults);
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sr.store = {
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elements : {},
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containers : []
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};
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sr.sequences = {};
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sr.history = [];
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sr.uid = 0;
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sr.initialized = false;
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}
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// Note: IE9 only supports console if devtools are open.
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else if (typeof console !== 'undefined' && console !== null) {
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console.log('ScrollReveal is not supported in this browser.');
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}
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return sr
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}
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/**
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* Check if client supports CSS Transform and CSS Transition.
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* @return {boolean}
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*/
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ScrollReveal.prototype.isSupported = function() {
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var style = document.documentElement.style;
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return 'WebkitTransition' in style && 'WebkitTransform' in style
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|| 'transition' in style && 'transform' in style
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};
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/**
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* Creates a reveal set, a group of elements that will animate when they
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* become visible. If [interval] is provided, a new sequence is created
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* that will ensure elements reveal in the order they appear in the DOM.
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*
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* @param {string|Node} [selector] The element (node) or elements (selector) to animate.
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* @param {Object} [config] Override the defaults for this reveal set.
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* @param {number} [interval] Time between sequenced element animations (milliseconds).
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* @param {boolean} [sync] Used internally when updating reveals for async content.
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*
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* @return {Object} The current ScrollReveal instance.
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*/
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ScrollReveal.prototype.reveal = function(selector, config, interval, sync) {
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var
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container,
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elements,
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elem,
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elemId,
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sequence,
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sequenceId;
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// Resolve container.
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if (config && config.container) {
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container = _resolveContainer(config);
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} else {
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container = sr.defaults.container;
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}
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// Let’s check to see if a DOM node was passed in as the first argument,
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// otherwise query the container for all elements matching the selector.
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if (sr.tools.isNode(selector)) {
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elements = [selector];
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} else {
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elements = Array.prototype.slice.call(container.querySelectorAll(selector));
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}
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if (!elements.length) {
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console.log('ScrollReveal: reveal on "'+ selector + '" failed, no elements found.');
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return sr
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}
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// No custom configuration was passed, but a sequence interval instead.
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// let’s shuffle things around to make sure everything works.
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if (config && typeof config == 'number') {
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interval = config;
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config = {};
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}
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// Prepare a new sequence if an interval is passed.
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if (interval && typeof interval == 'number') {
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sequenceId = _nextUid();
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sequence = sr.sequences[sequenceId] = {
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id : sequenceId,
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interval : interval,
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elemIds : [],
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active : false
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}
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}
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// Begin main loop to configure ScrollReveal elements.
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for (var i = 0; i < elements.length; i++) {
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// Check if the element has already been configured and grab it from the store.
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elemId = elements[i].getAttribute('data-sr-id');
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if (elemId) {
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elem = sr.store.elements[elemId];
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}
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// Otherwise, let’s do some basic setup.
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else {
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elem = {
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id : _nextUid(),
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domEl : elements[i],
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seen : false,
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revealing : false
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};
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elem.domEl.setAttribute('data-sr-id', elem.id);
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}
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// Sequence only setup
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if (sequence) {
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elem.sequence = {
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id : sequence.id,
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index : sequence.elemIds.length
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};
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sequence.elemIds.push(elem.id);
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}
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// New or existing element, it’s time to update its configuration, styles,
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// and send the updates to our store.
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_configure(elem, config || {});
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_style(elem);
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_updateStore(elem);
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// We need to make sure elements are set to visibility: visible, even when
|
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// on mobile and `config.mobile == false`, or if unsupported.
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if (sr.tools.isMobile() && !elem.config.mobile || !sr.isSupported()) {
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elem.domEl.setAttribute('style', elem.styles.inline);
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elem.disabled = true;
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}
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// Otherwise, proceed normally.
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else if (!elem.revealing) {
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elem.domEl.setAttribute('style',
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elem.styles.inline
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+ elem.styles.transform.initial
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);
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}
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}
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// Each `reveal()` is recorded so that when calling `sync()` while working
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// with asynchronously loaded content, it can re-trace your steps but with
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// all your new elements now in the DOM.
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// Since `reveal()` is called internally by `sync()`, we don’t want to
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// record or intiialize each reveal during syncing.
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if (!sync && sr.isSupported()) {
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_record(selector, config);
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// We push initialization to the event queue using setTimeout, so that we can
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// give ScrollReveal room to process all reveal calls before putting things into motion.
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// --
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// Philip Roberts - What the heck is the event loop anyway? (JSConf EU 2014)
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// https://www.youtube.com/watch?v=8aGhZQkoFbQ
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if (sr.initTimeout) {
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window.clearTimeout(sr.initTimeout);
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}
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sr.initTimeout = window.setTimeout(_init, 0);
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}
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return sr
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};
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/**
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* Re-runs `reveal()` for each record stored in history, effectively capturing
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* any content loaded asynchronously that matches existing reveal set selectors.
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*
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* @return {Object} The current ScrollReveal instance.
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*/
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ScrollReveal.prototype.sync = function() {
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if (sr.history.length && sr.isSupported()) {
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for (var i = 0; i < sr.history.length; i++) {
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var record = sr.history[i];
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sr.reveal(record.selector, record.config, record.interval, true);
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};
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_init();
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} else {
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console.log('ScrollReveal: sync failed, no reveals found.');
|
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}
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return sr
|
|||
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};
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|||
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|
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/**
|
|||
|
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* Private Methods
|
|||
|
|
* ---------------
|
|||
|
|
* These methods remain accessible only to the ScrollReveal instance, even
|
|||
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* though they only "exist" during instantiation outside of the constructors scope.
|
|||
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* --
|
|||
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* http://stackoverflow.com/questions/111102/how-do-javascript-closures-work
|
|||
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*/
|
|||
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|
|||
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function _resolveContainer(config) {
|
|||
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var container = config.container;
|
|||
|
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|
|||
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// Check if our container is defined by a selector.
|
|||
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if (container && typeof container == 'string') {
|
|||
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return config.container = window.document.querySelector(container);
|
|||
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}
|
|||
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|
|||
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// Check if our container is defined by a node.
|
|||
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else if (container && !sr.tools.isNode(container)) {
|
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console.log('ScrollReveal: Invalid container provided, using <html> instead.');
|
|||
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config.container = null;
|
|||
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}
|
|||
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|||
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// Otherwise use <html> by default.
|
|||
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if (container == null) {
|
|||
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config.container = window.document.documentElement;
|
|||
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}
|
|||
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return config.container
|
|||
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}
|
|||
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|
|||
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|
|||
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|
|||
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/**
|
|||
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|
* A consistent way of creating unique IDs.
|
|||
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* @returns {number}
|
|||
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*/
|
|||
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function _nextUid() {
|
|||
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return ++sr.uid;
|
|||
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}
|
|||
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|
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|
|||
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|
|||
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function _configure(elem, config) {
|
|||
|
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|
|||
|
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// If the element hasn’t already been configured, let’s use a clone of the
|
|||
|
|
// defaults extended by the configuration passed as the second argument.
|
|||
|
|
if (!elem.config) {
|
|||
|
|
elem.config = sr.tools.extendClone(sr.defaults, config);
|
|||
|
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}
|
|||
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|
|||
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// Otherwise, let’s use a clone of the existing element configuration extended
|
|||
|
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// by the configuration passed as the second argument.
|
|||
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else {
|
|||
|
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elem.config = sr.tools.extendClone(elem.config, config);
|
|||
|
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}
|
|||
|
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|
|||
|
|
// Infer CSS Transform axis from origin string.
|
|||
|
|
if (elem.config.origin === 'top' || elem.config.origin === 'bottom') {
|
|||
|
|
elem.config.axis = 'Y';
|
|||
|
|
} else {
|
|||
|
|
elem.config.axis = 'X';
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
// Let’s make sure our our pixel distances are negative for top and left.
|
|||
|
|
// e.g. config.origin = 'top' and config.distance = '25px' starts at `top: -25px` in CSS.
|
|||
|
|
if (elem.config.origin === 'top' || elem.config.origin === 'left') {
|
|||
|
|
elem.config.distance = '-' + elem.config.distance;
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
function _style(elem) {
|
|||
|
|
var computed = window.getComputedStyle(elem.domEl);
|
|||
|
|
|
|||
|
|
if (!elem.styles) {
|
|||
|
|
elem.styles = {
|
|||
|
|
transition : {},
|
|||
|
|
transform : {},
|
|||
|
|
computed : {}
|
|||
|
|
};
|
|||
|
|
|
|||
|
|
// Capture any existing inline styles, and add our visibility override.
|
|||
|
|
// --
|
|||
|
|
// See section 4.2. in the Documentation:
|
|||
|
|
// https://github.com/jlmakes/scrollreveal.js#42-improve-user-experience
|
|||
|
|
elem.styles.inline = elem.domEl.getAttribute('style') || '';
|
|||
|
|
elem.styles.inline += '; visibility: visible; ';
|
|||
|
|
|
|||
|
|
// grab the elements existing opacity.
|
|||
|
|
elem.styles.computed.opacity = computed.opacity;
|
|||
|
|
|
|||
|
|
// grab the elements existing transitions.
|
|||
|
|
if (!computed.transition || computed.transition == 'all 0s ease 0s') {
|
|||
|
|
elem.styles.computed.transition = '';
|
|||
|
|
} else {
|
|||
|
|
elem.styles.computed.transition = computed.transition + ', ';
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
// Create transition styles
|
|||
|
|
elem.styles.transition.instant = _generateTransition(elem, 0);
|
|||
|
|
elem.styles.transition.delayed = _generateTransition(elem, elem.config.delay);
|
|||
|
|
|
|||
|
|
// Generate transform styles, first with the webkit prefix.
|
|||
|
|
elem.styles.transform.initial = ' -webkit-transform:';
|
|||
|
|
elem.styles.transform.target = ' -webkit-transform:';
|
|||
|
|
_generateTransform(elem);
|
|||
|
|
|
|||
|
|
// And again without any prefix.
|
|||
|
|
elem.styles.transform.initial += 'transform:';
|
|||
|
|
elem.styles.transform.target += 'transform:';
|
|||
|
|
_generateTransform(elem);
|
|||
|
|
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
function _generateTransition(elem, delay) {
|
|||
|
|
var config = elem.config;
|
|||
|
|
|
|||
|
|
return '-webkit-transition: ' + elem.styles.computed.transition +
|
|||
|
|
'-webkit-transform ' + config.duration / 1000 + 's '
|
|||
|
|
+ config.easing + ' '
|
|||
|
|
+ delay / 1000 + 's, opacity '
|
|||
|
|
+ config.duration / 1000 + 's '
|
|||
|
|
+ config.easing + ' '
|
|||
|
|
+ delay / 1000 + 's; ' +
|
|||
|
|
|
|||
|
|
'transition: ' + elem.styles.computed.transition +
|
|||
|
|
'transform ' + config.duration / 1000 + 's '
|
|||
|
|
+ config.easing + ' '
|
|||
|
|
+ delay / 1000 + 's, opacity '
|
|||
|
|
+ config.duration / 1000 + 's '
|
|||
|
|
+ config.easing + ' '
|
|||
|
|
+ delay / 1000 + 's; '
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
function _generateTransform(elem) {
|
|||
|
|
var config = elem.config;
|
|||
|
|
var transform = elem.styles.transform;
|
|||
|
|
|
|||
|
|
if (parseInt(config.distance)) {
|
|||
|
|
transform.initial += ' translate' + config.axis + '(' + config.distance + ')';
|
|||
|
|
transform.target += ' translate' + config.axis + '(0)';
|
|||
|
|
}
|
|||
|
|
if (config.scale) {
|
|||
|
|
transform.initial += ' scale(' + config.scale + ')';
|
|||
|
|
transform.target += ' scale(1)';
|
|||
|
|
}
|
|||
|
|
if (config.rotate.x) {
|
|||
|
|
transform.initial += ' rotateX(' + config.rotate.x + 'deg)';
|
|||
|
|
transform.target += ' rotateX(0)';
|
|||
|
|
}
|
|||
|
|
if (config.rotate.y) {
|
|||
|
|
transform.initial += ' rotateY(' + config.rotate.y + 'deg)';
|
|||
|
|
transform.target += ' rotateY(0)';
|
|||
|
|
}
|
|||
|
|
if (config.rotate.z) {
|
|||
|
|
transform.initial += ' rotateZ(' + config.rotate.z + 'deg)';
|
|||
|
|
transform.target += ' rotateZ(0)';
|
|||
|
|
}
|
|||
|
|
transform.initial += '; opacity: ' + config.opacity + ';';
|
|||
|
|
transform.target += '; opacity: ' + elem.styles.computed.opacity + ';';
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
function _updateStore(elem) {
|
|||
|
|
var container = elem.config.container;
|
|||
|
|
|
|||
|
|
// If this element’s container isn’t already in the store, let’s add it.
|
|||
|
|
if (container && sr.store.containers.indexOf(container) == -1) {
|
|||
|
|
sr.store.containers.push(elem.config.container);
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
// Update the element stored with our new element.
|
|||
|
|
sr.store.elements[elem.id] = elem;
|
|||
|
|
};
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
function _record(selector, config, interval) {
|
|||
|
|
|
|||
|
|
// Save the `reveal()` arguments that triggered this `_record()` call, so we
|
|||
|
|
// can re-trace our steps when calling the `sync()` method.
|
|||
|
|
var record = {
|
|||
|
|
selector : selector,
|
|||
|
|
config : config,
|
|||
|
|
interval : interval
|
|||
|
|
};
|
|||
|
|
sr.history.push(record);
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
function _init() {
|
|||
|
|
if (sr.isSupported()) {
|
|||
|
|
|
|||
|
|
// Initial animate call triggers valid reveal animations on first load.
|
|||
|
|
// Subsequent animate calls are made inside the event handler.
|
|||
|
|
_animate();
|
|||
|
|
|
|||
|
|
// Then we loop through all container nodes in the store and bind event
|
|||
|
|
// listeners to each.
|
|||
|
|
for (var i = 0; i < sr.store.containers.length; i++) {
|
|||
|
|
sr.store.containers[i].addEventListener('scroll', _handler);
|
|||
|
|
sr.store.containers[i].addEventListener('resize', _handler);
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
// Let’s also do a one-time binding of window event listeners.
|
|||
|
|
if (!sr.initialized) {
|
|||
|
|
window.addEventListener('scroll', _handler);
|
|||
|
|
window.addEventListener('resize', _handler);
|
|||
|
|
sr.initialized = true;
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
return sr
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
function _handler() {
|
|||
|
|
_requestAnimationFrame(_animate);
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
function _setActiveSequences() {
|
|||
|
|
|
|||
|
|
var
|
|||
|
|
active,
|
|||
|
|
elem,
|
|||
|
|
elemId,
|
|||
|
|
sequence;
|
|||
|
|
|
|||
|
|
// Loop through all sequences
|
|||
|
|
sr.tools.forOwn(sr.sequences, function(sequenceId) {
|
|||
|
|
sequence = sr.sequences[sequenceId];
|
|||
|
|
active = false;
|
|||
|
|
|
|||
|
|
// For each sequenced elemenet, let’s check visibility and if
|
|||
|
|
// any are visible, set it’s sequence to active.
|
|||
|
|
for (var i = 0; i < sequence.elemIds.length; i++) {
|
|||
|
|
elemId = sequence.elemIds[i]
|
|||
|
|
elem = sr.store.elements[elemId];
|
|||
|
|
if (_isElemVisible(elem) && !active) {
|
|||
|
|
active = true;
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
sequence.active = active;
|
|||
|
|
});
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
function _animate() {
|
|||
|
|
|
|||
|
|
var
|
|||
|
|
delayed,
|
|||
|
|
elem;
|
|||
|
|
|
|||
|
|
_setActiveSequences();
|
|||
|
|
|
|||
|
|
// Loop through all elements in the store
|
|||
|
|
sr.tools.forOwn(sr.store.elements, function(elemId) {
|
|||
|
|
|
|||
|
|
elem = sr.store.elements[elemId];
|
|||
|
|
delayed = _shouldUseDelay(elem);
|
|||
|
|
|
|||
|
|
// Let’s see if we should reveal, and if so, whether to use delay.
|
|||
|
|
if (_shouldReveal(elem)) {
|
|||
|
|
if (delayed) {
|
|||
|
|
elem.domEl.setAttribute('style',
|
|||
|
|
elem.styles.inline
|
|||
|
|
+ elem.styles.transform.target
|
|||
|
|
+ elem.styles.transition.delayed
|
|||
|
|
);
|
|||
|
|
} else {
|
|||
|
|
elem.domEl.setAttribute('style',
|
|||
|
|
elem.styles.inline
|
|||
|
|
+ elem.styles.transform.target
|
|||
|
|
+ elem.styles.transition.instant
|
|||
|
|
);
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
// Let’s queue the `afterReveal` callback and tag the element.
|
|||
|
|
_queueCallback('reveal', elem, delayed);
|
|||
|
|
elem.revealing = true;
|
|||
|
|
elem.seen = true;
|
|||
|
|
|
|||
|
|
if (elem.sequence) {
|
|||
|
|
_queueNextInSequence(elem, delayed);
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
// If we got this far our element shouldn’t reveal, but should it reset?
|
|||
|
|
else if (_shouldReset(elem)) {
|
|||
|
|
elem.domEl.setAttribute('style',
|
|||
|
|
elem.styles.inline
|
|||
|
|
+ elem.styles.transform.initial
|
|||
|
|
+ elem.styles.transition.instant
|
|||
|
|
);
|
|||
|
|
_queueCallback('reset', elem);
|
|||
|
|
elem.revealing = false;
|
|||
|
|
}
|
|||
|
|
});
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
/**
|
|||
|
|
* Sequence callback that triggers the next element.
|
|||
|
|
*/
|
|||
|
|
function _queueNextInSequence(elem, delayed) {
|
|||
|
|
|
|||
|
|
var
|
|||
|
|
elapsed = 0,
|
|||
|
|
delay = 0,
|
|||
|
|
sequence = sr.sequences[elem.sequence.id];
|
|||
|
|
|
|||
|
|
// We’re processing a sequenced element, so let's block other elements in this sequence.
|
|||
|
|
sequence.blocked = true;
|
|||
|
|
|
|||
|
|
// Since we’re triggering animations a part of a sequence after animations on first load,
|
|||
|
|
// we need to check for that condition and explicitly add the delay to our timer.
|
|||
|
|
if (delayed && elem.config.useDelay == 'onload') {
|
|||
|
|
delay = elem.config.delay;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
// If a sequence timer is already running, capture the elapsed time and clear it.
|
|||
|
|
if (elem.sequence.timer) {
|
|||
|
|
elapsed = Math.abs(elem.sequence.timer.started - new Date());
|
|||
|
|
window.clearTimeout(elem.sequence.timer);
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
// Start a new timer.
|
|||
|
|
elem.sequence.timer = { started: new Date() };
|
|||
|
|
elem.sequence.timer.clock = window.setTimeout(function() {
|
|||
|
|
|
|||
|
|
// Sequence interval has passed, so unblock the sequence and re-run the handler.
|
|||
|
|
sequence.blocked = false;
|
|||
|
|
elem.sequence.timer = null;
|
|||
|
|
_handler();
|
|||
|
|
|
|||
|
|
}, Math.abs(sequence.interval) + delay - elapsed);
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
function _queueCallback(type, elem, delayed) {
|
|||
|
|
|
|||
|
|
var
|
|||
|
|
elapsed = 0,
|
|||
|
|
duration = 0,
|
|||
|
|
callback = 'after';
|
|||
|
|
|
|||
|
|
// Check which callback we’re working with.
|
|||
|
|
switch (type) {
|
|||
|
|
|
|||
|
|
case 'reveal':
|
|||
|
|
duration = elem.config.duration;
|
|||
|
|
if (delayed) {
|
|||
|
|
duration += elem.config.delay;
|
|||
|
|
}
|
|||
|
|
callback += 'Reveal';
|
|||
|
|
break
|
|||
|
|
|
|||
|
|
case 'reset':
|
|||
|
|
duration = elem.config.duration;
|
|||
|
|
callback += 'Reset';
|
|||
|
|
break
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
// If a timer is already running, capture the elapsed time and clear it.
|
|||
|
|
if (elem.timer) {
|
|||
|
|
elapsed = Math.abs(elem.timer.started - new Date());
|
|||
|
|
window.clearTimeout(elem.timer.clock);
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
// Start a new timer.
|
|||
|
|
elem.timer = { started: new Date() };
|
|||
|
|
elem.timer.clock = window.setTimeout(function() {
|
|||
|
|
|
|||
|
|
// The timer completed, so let’s fire the callback and null the timer.
|
|||
|
|
elem.config[callback](elem.domEl);
|
|||
|
|
elem.timer = null;
|
|||
|
|
|
|||
|
|
}, duration - elapsed);
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
function _shouldReveal(elem) {
|
|||
|
|
if (elem.sequence) {
|
|||
|
|
var sequence = sr.sequences[elem.sequence.id];
|
|||
|
|
return sequence.active
|
|||
|
|
&& !sequence.blocked
|
|||
|
|
&& !elem.revealing
|
|||
|
|
&& !elem.disabled
|
|||
|
|
}
|
|||
|
|
return _isElemVisible(elem)
|
|||
|
|
&& !elem.revealing
|
|||
|
|
&& !elem.disabled
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
function _shouldUseDelay(elem) {
|
|||
|
|
var config = elem.config.useDelay;
|
|||
|
|
return config === 'always'
|
|||
|
|
|| (config === 'onload' && !sr.initialized)
|
|||
|
|
|| (config === 'once' && !elem.seen)
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
function _shouldReset(elem) {
|
|||
|
|
if (elem.sequence) {
|
|||
|
|
var sequence = sr.sequences[elem.sequence.id];
|
|||
|
|
return !sequence.active
|
|||
|
|
&& elem.config.reset
|
|||
|
|
&& elem.revealing
|
|||
|
|
&& !elem.disabled
|
|||
|
|
}
|
|||
|
|
return !_isElemVisible(elem)
|
|||
|
|
&& elem.config.reset
|
|||
|
|
&& elem.revealing
|
|||
|
|
&& !elem.disabled
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
function _getContainer(container) {
|
|||
|
|
return {
|
|||
|
|
width : container.clientWidth,
|
|||
|
|
height : container.clientHeight
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
function _getScrolled(container) {
|
|||
|
|
|
|||
|
|
// Return the container scroll values, plus the its offset.
|
|||
|
|
if (container && container !== window.document.documentElement) {
|
|||
|
|
var offset = _getOffset(container);
|
|||
|
|
return {
|
|||
|
|
x : container.scrollLeft + offset.left,
|
|||
|
|
y : container.scrollTop + offset.top
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
// Otherwise, default to the window object’s scroll values.
|
|||
|
|
else {
|
|||
|
|
return {
|
|||
|
|
x : window.pageXOffset,
|
|||
|
|
y : window.pageYOffset
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
function _getOffset(domEl) {
|
|||
|
|
|
|||
|
|
var
|
|||
|
|
offsetTop = 0,
|
|||
|
|
offsetLeft = 0,
|
|||
|
|
|
|||
|
|
// Grab the element’s dimensions.
|
|||
|
|
offsetHeight = domEl.offsetHeight,
|
|||
|
|
offsetWidth = domEl.offsetWidth;
|
|||
|
|
|
|||
|
|
// Now calculate the distance between the element and its parent, then
|
|||
|
|
// again for the parent to its parent, and again etc... until we have the
|
|||
|
|
// total distance of the element to the document’s top and left origin.
|
|||
|
|
do {
|
|||
|
|
if (!isNaN(domEl.offsetTop)) {
|
|||
|
|
offsetTop += domEl.offsetTop;
|
|||
|
|
}
|
|||
|
|
if (!isNaN(domEl.offsetLeft)) {
|
|||
|
|
offsetLeft += domEl.offsetLeft;
|
|||
|
|
}
|
|||
|
|
} while (domEl = domEl.offsetParent);
|
|||
|
|
|
|||
|
|
return {
|
|||
|
|
top : offsetTop,
|
|||
|
|
left : offsetLeft,
|
|||
|
|
height : offsetHeight,
|
|||
|
|
width : offsetWidth
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
function _isElemVisible(elem) {
|
|||
|
|
|
|||
|
|
var
|
|||
|
|
offset = _getOffset(elem.domEl),
|
|||
|
|
container = _getContainer(elem.config.container),
|
|||
|
|
scrolled = _getScrolled(elem.config.container),
|
|||
|
|
vF = elem.config.viewFactor,
|
|||
|
|
|
|||
|
|
// Define the element geometry.
|
|||
|
|
elemHeight = offset.height,
|
|||
|
|
elemWidth = offset.width,
|
|||
|
|
elemTop = offset.top,
|
|||
|
|
elemLeft = offset.left,
|
|||
|
|
elemBottom = elemTop + elemHeight,
|
|||
|
|
elemRight = elemLeft + elemWidth;
|
|||
|
|
|
|||
|
|
return confirmBounds() || isPositionFixed()
|
|||
|
|
|
|||
|
|
function confirmBounds() {
|
|||
|
|
|
|||
|
|
var
|
|||
|
|
// Define the element’s functional boundaries using its view factor.
|
|||
|
|
top = elemTop + elemHeight * vF,
|
|||
|
|
left = elemLeft + elemWidth * vF,
|
|||
|
|
bottom = elemBottom - elemHeight * vF,
|
|||
|
|
right = elemRight - elemWidth * vF,
|
|||
|
|
|
|||
|
|
// Define the container functional boundaries using its view offset.
|
|||
|
|
viewTop = scrolled.y + elem.config.viewOffset.top,
|
|||
|
|
viewLeft = scrolled.x + elem.config.viewOffset.left,
|
|||
|
|
viewBottom = scrolled.y - elem.config.viewOffset.bottom + container.height,
|
|||
|
|
viewRight = scrolled.x - elem.config.viewOffset.right + container.width;
|
|||
|
|
|
|||
|
|
return top < viewBottom
|
|||
|
|
&& bottom > viewTop
|
|||
|
|
&& left > viewLeft
|
|||
|
|
&& right < viewRight
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
function isPositionFixed() {
|
|||
|
|
return (window.getComputedStyle(elem.domEl).position === 'fixed')
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
return ScrollReveal
|
|||
|
|
|
|||
|
|
})();
|
|||
|
|
|
|||
|
|
|
|||
|
|
/**
|
|||
|
|
* helper.tools.js
|
|||
|
|
* ---------------
|
|||
|
|
* Simple deep object extend, and a few other agnostic helper methods.
|
|||
|
|
* gist: https://gist.github.com/jlmakes/9f104e3f1b4d86334987
|
|||
|
|
*/
|
|||
|
|
|
|||
|
|
Tools = (function() {
|
|||
|
|
|
|||
|
|
Tools.prototype.isObject = function(object) {
|
|||
|
|
return object !== null && typeof object === 'object' && object.constructor == Object
|
|||
|
|
};
|
|||
|
|
|
|||
|
|
Tools.prototype.isNode = function(object) {
|
|||
|
|
return typeof Node === 'object'
|
|||
|
|
? object instanceof Node
|
|||
|
|
: object && typeof object === 'object'
|
|||
|
|
&& typeof object.nodeType === 'number'
|
|||
|
|
&& typeof object.nodeName === 'string'
|
|||
|
|
};
|
|||
|
|
|
|||
|
|
Tools.prototype.forOwn = function(object, callback) {
|
|||
|
|
if (!this.isObject(object)) {
|
|||
|
|
throw new TypeError('Expected "object", but received "' + typeof object + '".');
|
|||
|
|
} else {
|
|||
|
|
for (var property in object) {
|
|||
|
|
if (object.hasOwnProperty(property)) {
|
|||
|
|
callback(property);
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
};
|
|||
|
|
|
|||
|
|
Tools.prototype.extend = function(target, source) {
|
|||
|
|
this.forOwn(source, function(property) {
|
|||
|
|
if (this.isObject(source[property])) {
|
|||
|
|
if (!target[property] || !this.isObject(target[property])) {
|
|||
|
|
target[property] = {};
|
|||
|
|
}
|
|||
|
|
this.extend(target[property], source[property]);
|
|||
|
|
} else {
|
|||
|
|
target[property] = source[property];
|
|||
|
|
}
|
|||
|
|
}.bind(this));
|
|||
|
|
return target
|
|||
|
|
};
|
|||
|
|
|
|||
|
|
Tools.prototype.extendClone = function(target, source) {
|
|||
|
|
return this.extend(this.extend({}, target), source)
|
|||
|
|
};
|
|||
|
|
|
|||
|
|
Tools.prototype.isMobile = function() {
|
|||
|
|
return /Android|webOS|iPhone|iPad|iPod|BlackBerry|IEMobile|Opera Mini/i.test(navigator.userAgent)
|
|||
|
|
};
|
|||
|
|
|
|||
|
|
function Tools() {};
|
|||
|
|
return Tools
|
|||
|
|
|
|||
|
|
})();
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
_requestAnimationFrame = window.requestAnimationFrame ||
|
|||
|
|
window.webkitRequestAnimationFrame ||
|
|||
|
|
window.mozRequestAnimationFrame;
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
}).call(this);
|
|||
|
|
|
|||
|
|
return this.ScrollReveal;
|
|||
|
|
|
|||
|
|
}));
|