first commit
This commit is contained in:
Ryan Ariana
@@ -0,0 +1,568 @@
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(function (root, factory) {
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if ( typeof define === 'function' && define.amd ) {
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define([], function () {
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return factory(root);
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});
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} else if ( typeof exports === 'object' ) {
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module.exports = factory(root);
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} else {
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root.SmoothScroll = factory(root);
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}
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})(typeof global !== 'undefined' ? global : typeof window !== 'undefined' ? window : this, function (window) {
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'use strict';
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//
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// Feature Test
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//
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var supports =
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'querySelector' in document &&
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'addEventListener' in window &&
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'requestAnimationFrame' in window &&
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'closest' in window.Element.prototype;
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//
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// Default settings
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//
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var defaults = {
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// Selectors
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ignore: '[data-scroll-ignore]',
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header: null,
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// Speed & Easing
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speed: 500,
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offset: 0,
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easing: 'easeInOutCubic',
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customEasing: null,
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// Callback API
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before: function () {},
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after: function () {}
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};
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//
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// Utility Methods
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//
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/**
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* Merge two or more objects. Returns a new object.
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* @param {Object} objects The objects to merge together
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* @returns {Object} Merged values of defaults and options
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*/
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var extend = function () {
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// Variables
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var extended = {};
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var i = 0;
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var length = arguments.length;
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// Merge the object into the extended object
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var merge = function (obj) {
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for (var prop in obj) {
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if (obj.hasOwnProperty(prop)) {
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extended[prop] = obj[prop];
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}
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}
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};
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// Loop through each object and conduct a merge
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for ( ; i < length; i++ ) {
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var obj = arguments[i];
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merge(obj);
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}
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return extended;
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};
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/**
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* Get the height of an element.
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* @param {Node} elem The element to get the height of
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* @return {Number} The element's height in pixels
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*/
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var getHeight = function (elem) {
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return parseInt(window.getComputedStyle(elem).height, 10);
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};
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/**
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* Escape special characters for use with querySelector
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* @param {String} id The anchor ID to escape
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* @author Mathias Bynens
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* @link https://github.com/mathiasbynens/CSS.escape
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*/
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var escapeCharacters = function (id) {
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// Remove leading hash
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if (id.charAt(0) === '#') {
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id = id.substr(1);
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}
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var string = String(id);
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var length = string.length;
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var index = -1;
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var codeUnit;
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var result = '';
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var firstCodeUnit = string.charCodeAt(0);
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while (++index < length) {
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codeUnit = string.charCodeAt(index);
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// Note: there’s no need to special-case astral symbols, surrogate
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// pairs, or lone surrogates.
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// If the character is NULL (U+0000), then throw an
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// `InvalidCharacterError` exception and terminate these steps.
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if (codeUnit === 0x0000) {
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throw new InvalidCharacterError(
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'Invalid character: the input contains U+0000.'
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);
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}
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if (
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// If the character is in the range [\1-\1F] (U+0001 to U+001F) or is
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// U+007F, […]
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(codeUnit >= 0x0001 && codeUnit <= 0x001F) || codeUnit == 0x007F ||
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// If the character is the first character and is in the range [0-9]
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// (U+0030 to U+0039), […]
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(index === 0 && codeUnit >= 0x0030 && codeUnit <= 0x0039) ||
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// If the character is the second character and is in the range [0-9]
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// (U+0030 to U+0039) and the first character is a `-` (U+002D), […]
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(
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index === 1 &&
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codeUnit >= 0x0030 && codeUnit <= 0x0039 &&
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firstCodeUnit === 0x002D
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)
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) {
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// http://dev.w3.org/csswg/cssom/#escape-a-character-as-code-point
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result += '\\' + codeUnit.toString(16) + ' ';
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continue;
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}
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// If the character is not handled by one of the above rules and is
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// greater than or equal to U+0080, is `-` (U+002D) or `_` (U+005F), or
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// is in one of the ranges [0-9] (U+0030 to U+0039), [A-Z] (U+0041 to
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// U+005A), or [a-z] (U+0061 to U+007A), […]
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if (
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codeUnit >= 0x0080 ||
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codeUnit === 0x002D ||
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codeUnit === 0x005F ||
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codeUnit >= 0x0030 && codeUnit <= 0x0039 ||
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codeUnit >= 0x0041 && codeUnit <= 0x005A ||
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codeUnit >= 0x0061 && codeUnit <= 0x007A
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) {
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// the character itself
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result += string.charAt(index);
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continue;
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}
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// Otherwise, the escaped character.
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// http://dev.w3.org/csswg/cssom/#escape-a-character
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result += '\\' + string.charAt(index);
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}
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return '#' + result;
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};
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/**
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* Calculate the easing pattern
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* @link https://gist.github.com/gre/1650294
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* @param {String} type Easing pattern
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* @param {Number} time Time animation should take to complete
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* @returns {Number}
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*/
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var easingPattern = function (settings, time) {
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var pattern;
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// Default Easing Patterns
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if (settings.easing === 'easeInQuad') pattern = time * time; // accelerating from zero velocity
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if (settings.easing === 'easeOutQuad') pattern = time * (2 - time); // decelerating to zero velocity
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if (settings.easing === 'easeInOutQuad') pattern = time < 0.5 ? 2 * time * time : -1 + (4 - 2 * time) * time; // acceleration until halfway, then deceleration
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if (settings.easing === 'easeInCubic') pattern = time * time * time; // accelerating from zero velocity
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if (settings.easing === 'easeOutCubic') pattern = (--time) * time * time + 1; // decelerating to zero velocity
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if (settings.easing === 'easeInOutCubic') pattern = time < 0.5 ? 4 * time * time * time : (time - 1) * (2 * time - 2) * (2 * time - 2) + 1; // acceleration until halfway, then deceleration
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if (settings.easing === 'easeInQuart') pattern = time * time * time * time; // accelerating from zero velocity
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if (settings.easing === 'easeOutQuart') pattern = 1 - (--time) * time * time * time; // decelerating to zero velocity
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if (settings.easing === 'easeInOutQuart') pattern = time < 0.5 ? 8 * time * time * time * time : 1 - 8 * (--time) * time * time * time; // acceleration until halfway, then deceleration
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if (settings.easing === 'easeInQuint') pattern = time * time * time * time * time; // accelerating from zero velocity
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if (settings.easing === 'easeOutQuint') pattern = 1 + (--time) * time * time * time * time; // decelerating to zero velocity
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if (settings.easing === 'easeInOutQuint') pattern = time < 0.5 ? 16 * time * time * time * time * time : 1 + 16 * (--time) * time * time * time * time; // acceleration until halfway, then deceleration
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// Custom Easing Patterns
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if (!!settings.customEasing) pattern = settings.customEasing(time);
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return pattern || time; // no easing, no acceleration
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};
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/**
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* Determine the document's height
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* @returns {Number}
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*/
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var getDocumentHeight = function () {
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return Math.max(
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document.body.scrollHeight, document.documentElement.scrollHeight,
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document.body.offsetHeight, document.documentElement.offsetHeight,
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document.body.clientHeight, document.documentElement.clientHeight
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);
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};
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/**
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* Calculate how far to scroll
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* @param {Element} anchor The anchor element to scroll to
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* @param {Number} headerHeight Height of a fixed header, if any
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* @param {Number} offset Number of pixels by which to offset scroll
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* @returns {Number}
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*/
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var getEndLocation = function (anchor, headerHeight, offset) {
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var location = 0;
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if (anchor.offsetParent) {
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do {
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location += anchor.offsetTop;
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anchor = anchor.offsetParent;
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} while (anchor);
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}
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location = Math.max(location - headerHeight - offset, 0);
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return location;
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};
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/**
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* Get the height of the fixed header
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* @param {Node} header The header
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* @return {Number} The height of the header
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*/
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var getHeaderHeight = function (header) {
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return !header ? 0 : (getHeight(header) + header.offsetTop);
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};
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/**
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* Bring the anchored element into focus
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* @param {Node} anchor The anchor element
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* @param {Number} endLocation The end location to scroll to
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* @param {Boolean} isNum If true, scroll is to a position rather than an element
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*/
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var adjustFocus = function (anchor, endLocation, isNum) {
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// Don't run if scrolling to a number on the page
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if (isNum) return;
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// Otherwise, bring anchor element into focus
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anchor.focus();
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if (document.activeElement.id !== anchor.id) {
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anchor.setAttribute('tabindex', '-1');
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anchor.focus();
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anchor.style.outline = 'none';
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}
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window.scrollTo(0 , endLocation);
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};
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/**
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* Check to see if user prefers reduced motion
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* @param {Object} settings Script settings
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*/
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var reduceMotion = function (settings) {
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if ('matchMedia' in window && window.matchMedia('(prefers-reduced-motion)').matches) {
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return true;
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}
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return false;
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};
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//
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// SmoothScroll Constructor
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//
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var SmoothScroll = function (selector, options) {
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//
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// Variables
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//
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var smoothScroll = {}; // Object for public APIs
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var settings, anchor, toggle, fixedHeader, headerHeight, eventTimeout, animationInterval;
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//
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// Methods
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//
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/**
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* Cancel a scroll-in-progress
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*/
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smoothScroll.cancelScroll = function () {
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// clearInterval(animationInterval);
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cancelAnimationFrame(animationInterval);
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};
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/**
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* Start/stop the scrolling animation
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* @param {Node|Number} anchor The element or position to scroll to
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* @param {Element} toggle The element that toggled the scroll event
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* @param {Object} options
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*/
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smoothScroll.animateScroll = function (anchor, toggle, options) {
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// Local settings
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var animateSettings = extend(settings || defaults, options || {}); // Merge user options with defaults
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// Selectors and variables
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var isNum = Object.prototype.toString.call(anchor) === '[object Number]' ? true : false;
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var anchorElem = isNum || !anchor.tagName ? null : anchor;
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if (!isNum && !anchorElem) return;
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var startLocation = window.pageYOffset; // Current location on the page
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if (animateSettings.header && !fixedHeader) {
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// Get the fixed header if not already set
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fixedHeader = document.querySelector( animateSettings.header );
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}
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if (!headerHeight) {
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// Get the height of a fixed header if one exists and not already set
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headerHeight = getHeaderHeight(fixedHeader);
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}
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var endLocation = isNum ? anchor : getEndLocation(anchorElem, headerHeight, parseInt((typeof animateSettings.offset === 'function' ? animateSettings.offset() : animateSettings.offset), 10)); // Location to scroll to
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var distance = endLocation - startLocation; // distance to travel
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var documentHeight = getDocumentHeight();
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var timeLapsed = 0;
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var start, percentage, position;
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/**
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* Stop the scroll animation when it reaches its target (or the bottom/top of page)
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* @param {Number} position Current position on the page
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* @param {Number} endLocation Scroll to location
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* @param {Number} animationInterval How much to scroll on this loop
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*/
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var stopAnimateScroll = function (position, endLocation) {
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// Get the current location
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var currentLocation = window.pageYOffset;
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// Check if the end location has been reached yet (or we've hit the end of the document)
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if ( position == endLocation || currentLocation == endLocation || ((startLocation < endLocation && window.innerHeight + currentLocation) >= documentHeight )) {
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// Clear the animation timer
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smoothScroll.cancelScroll();
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// Bring the anchored element into focus
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adjustFocus(anchor, endLocation, isNum);
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// Run callback after animation complete
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animateSettings.after(anchor, toggle);
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// Reset start
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start = null;
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return true;
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}
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};
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/**
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* Loop scrolling animation
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*/
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var loopAnimateScroll = function (timestamp) {
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if (!start) { start = timestamp; }
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timeLapsed += timestamp - start;
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percentage = (timeLapsed / parseInt(animateSettings.speed, 10));
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percentage = (percentage > 1) ? 1 : percentage;
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position = startLocation + (distance * easingPattern(animateSettings, percentage));
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window.scrollTo(0, Math.floor(position));
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if (!stopAnimateScroll(position, endLocation)) {
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window.requestAnimationFrame(loopAnimateScroll);
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start = timestamp;
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||||
}
|
||||
};
|
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|
||||
/**
|
||||
* Reset position to fix weird iOS bug
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||||
* @link https://github.com/cferdinandi/smooth-scroll/issues/45
|
||||
*/
|
||||
if (window.pageYOffset === 0) {
|
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window.scrollTo( 0, 0 );
|
||||
}
|
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|
||||
// Run callback before animation starts
|
||||
animateSettings.before(anchor, toggle);
|
||||
|
||||
// Start scrolling animation
|
||||
smoothScroll.cancelScroll();
|
||||
window.requestAnimationFrame(loopAnimateScroll);
|
||||
|
||||
|
||||
};
|
||||
|
||||
/**
|
||||
* Handle has change event
|
||||
*/
|
||||
var hashChangeHandler = function (event) {
|
||||
|
||||
// Only run if there's an anchor element to scroll to
|
||||
if (!anchor) return;
|
||||
|
||||
// Reset the anchor element's ID
|
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anchor.id = anchor.getAttribute('data-scroll-id');
|
||||
|
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// Scroll to the anchored content
|
||||
smoothScroll.animateScroll(anchor, toggle);
|
||||
|
||||
// Reset anchor and toggle
|
||||
anchor = null;
|
||||
toggle = null;
|
||||
|
||||
};
|
||||
|
||||
/**
|
||||
* If smooth scroll element clicked, animate scroll
|
||||
*/
|
||||
var clickHandler = function (event) {
|
||||
|
||||
// Don't run if the user prefers reduced motion
|
||||
if (reduceMotion(settings)) return;
|
||||
|
||||
// Don't run if right-click or command/control + click
|
||||
if (event.button !== 0 || event.metaKey || event.ctrlKey) return;
|
||||
|
||||
// Check if a smooth scroll link was clicked
|
||||
toggle = event.target.closest(selector);
|
||||
if (!toggle || toggle.tagName.toLowerCase() !== 'a' || event.target.closest(settings.ignore)) return;
|
||||
|
||||
// Only run if link is an anchor and points to the current page
|
||||
if (toggle.hostname !== window.location.hostname || toggle.pathname !== window.location.pathname || !/#/.test(toggle.href)) return;
|
||||
|
||||
// Get the sanitized hash
|
||||
var hash;
|
||||
try {
|
||||
hash = escapeCharacters(decodeURIComponent(toggle.hash));
|
||||
} catch(e) {
|
||||
hash = escapeCharacters(toggle.hash);
|
||||
}
|
||||
|
||||
// If the hash is empty, scroll to the top of the page
|
||||
if (hash === '#') {
|
||||
|
||||
// Prevent default link behavior
|
||||
event.preventDefault();
|
||||
|
||||
// Set the anchored element
|
||||
anchor = document.body;
|
||||
|
||||
// Save or create the ID as a data attribute and remove it (prevents scroll jump)
|
||||
var id = anchor.id ? anchor.id : 'smooth-scroll-top';
|
||||
anchor.setAttribute('data-scroll-id', id);
|
||||
anchor.id = '';
|
||||
|
||||
// If no hash change event will happen, fire manually
|
||||
// Otherwise, update the hash
|
||||
if (window.location.hash.substring(1) === id) {
|
||||
hashChangeHandler();
|
||||
} else {
|
||||
window.location.hash = id;
|
||||
}
|
||||
|
||||
return;
|
||||
|
||||
}
|
||||
|
||||
// Get the anchored element
|
||||
anchor = document.querySelector(hash);
|
||||
|
||||
// If anchored element exists, save the ID as a data attribute and remove it (prevents scroll jump)
|
||||
if (!anchor) return;
|
||||
anchor.setAttribute('data-scroll-id', anchor.id);
|
||||
anchor.id = '';
|
||||
|
||||
// If no hash change event will happen, fire manually
|
||||
if (toggle.hash === window.location.hash) {
|
||||
event.preventDefault();
|
||||
hashChangeHandler();
|
||||
}
|
||||
|
||||
};
|
||||
|
||||
/**
|
||||
* On window scroll and resize, only run events at a rate of 15fps for better performance
|
||||
*/
|
||||
var resizeThrottler = function (event) {
|
||||
if (!eventTimeout) {
|
||||
eventTimeout = setTimeout(function() {
|
||||
eventTimeout = null; // Reset timeout
|
||||
headerHeight = getHeaderHeight(fixedHeader); // Get the height of a fixed header if one exists
|
||||
}, 66);
|
||||
}
|
||||
};
|
||||
|
||||
/**
|
||||
* Destroy the current initialization.
|
||||
*/
|
||||
smoothScroll.destroy = function () {
|
||||
|
||||
// If plugin isn't already initialized, stop
|
||||
if (!settings) return;
|
||||
|
||||
// Remove event listeners
|
||||
document.removeEventListener('click', clickHandler, false);
|
||||
window.removeEventListener('resize', resizeThrottler, false);
|
||||
|
||||
// Cancel any scrolls-in-progress
|
||||
smoothScroll.cancelScroll();
|
||||
|
||||
// Reset variables
|
||||
settings = null;
|
||||
anchor = null;
|
||||
toggle = null;
|
||||
fixedHeader = null;
|
||||
headerHeight = null;
|
||||
eventTimeout = null;
|
||||
animationInterval = null;
|
||||
};
|
||||
|
||||
/**
|
||||
* Initialize Smooth Scroll
|
||||
* @param {Object} options User settings
|
||||
*/
|
||||
smoothScroll.init = function (options) {
|
||||
|
||||
// feature test
|
||||
if (!supports) return;
|
||||
|
||||
// Destroy any existing initializations
|
||||
smoothScroll.destroy();
|
||||
|
||||
// Selectors and variables
|
||||
settings = extend(defaults, options || {}); // Merge user options with defaults
|
||||
fixedHeader = settings.header ? document.querySelector(settings.header) : null; // Get the fixed header
|
||||
headerHeight = getHeaderHeight(fixedHeader);
|
||||
|
||||
// When a toggle is clicked, run the click handler
|
||||
document.addEventListener('click', clickHandler, false);
|
||||
|
||||
// Listen for hash changes
|
||||
window.addEventListener('hashchange', hashChangeHandler, false);
|
||||
|
||||
// If window is resized and there's a fixed header, recalculate its size
|
||||
if (fixedHeader) {
|
||||
window.addEventListener('resize', resizeThrottler, false);
|
||||
}
|
||||
|
||||
};
|
||||
|
||||
|
||||
//
|
||||
// Initialize plugin
|
||||
//
|
||||
|
||||
smoothScroll.init(options);
|
||||
|
||||
|
||||
//
|
||||
// Public APIs
|
||||
//
|
||||
|
||||
return smoothScroll;
|
||||
|
||||
};
|
||||
|
||||
return SmoothScroll;
|
||||
|
||||
});
|
||||
@@ -0,0 +1 @@
|
||||
!function(e,t){"function"==typeof define&&define.amd?define([],function(){return t(e)}):"object"==typeof exports?module.exports=t(e):e.SmoothScroll=t(e)}("undefined"!=typeof global?global:"undefined"!=typeof window?window:this,function(e){"use strict";var t="querySelector"in document&&"addEventListener"in e&&"requestAnimationFrame"in e&&"closest"in e.Element.prototype,n={ignore:"[data-scroll-ignore]",header:null,speed:500,offset:0,easing:"easeInOutCubic",customEasing:null,before:function(){},after:function(){}},o=function(){for(var e={},t=0,n=arguments.length,o=function(t){for(var n in t)t.hasOwnProperty(n)&&(e[n]=t[n])};t<n;t++){o(arguments[t])}return e},a=function(e){"#"===e.charAt(0)&&(e=e.substr(1));for(var t,n=String(e),o=n.length,a=-1,r="",i=n.charCodeAt(0);++a<o;){if(0===(t=n.charCodeAt(a)))throw new InvalidCharacterError("Invalid character: the input contains U+0000.");t>=1&&t<=31||127==t||0===a&&t>=48&&t<=57||1===a&&t>=48&&t<=57&&45===i?r+="\\"+t.toString(16)+" ":r+=t>=128||45===t||95===t||t>=48&&t<=57||t>=65&&t<=90||t>=97&&t<=122?n.charAt(a):"\\"+n.charAt(a)}return"#"+r},r=function(t){return t?(n=t,parseInt(e.getComputedStyle(n).height,10)+t.offsetTop):0;var n};return function(i,c){var u,s,l,d,f,m,h,g={};g.cancelScroll=function(){cancelAnimationFrame(h)},g.animateScroll=function(t,a,i){var c=o(u||n,i||{}),s="[object Number]"===Object.prototype.toString.call(t),l=s||!t.tagName?null:t;if(s||l){var m=e.pageYOffset;c.header&&!d&&(d=document.querySelector(c.header)),f||(f=r(d));var h,p,v,b=s?t:function(e,t,n){var o=0;if(e.offsetParent)do{o+=e.offsetTop,e=e.offsetParent}while(e);return o=Math.max(o-t-n,0)}(l,f,parseInt("function"==typeof c.offset?c.offset():c.offset,10)),y=b-m,S=Math.max(document.body.scrollHeight,document.documentElement.scrollHeight,document.body.offsetHeight,document.documentElement.offsetHeight,document.body.clientHeight,document.documentElement.clientHeight),E=0,I=function(n,o){var r,i,u=e.pageYOffset;if(n==o||u==o||(m<o&&e.innerHeight+u)>=S)return g.cancelScroll(),r=t,i=o,s||(r.focus(),document.activeElement.id!==r.id&&(r.setAttribute("tabindex","-1"),r.focus(),r.style.outline="none"),e.scrollTo(0,i)),c.after(t,a),h=null,!0},O=function(t){var n,o,a;h||(h=t),p=(E+=t-h)/parseInt(c.speed,10),v=m+y*(o=p=p>1?1:p,"easeInQuad"===(n=c).easing&&(a=o*o),"easeOutQuad"===n.easing&&(a=o*(2-o)),"easeInOutQuad"===n.easing&&(a=o<.5?2*o*o:(4-2*o)*o-1),"easeInCubic"===n.easing&&(a=o*o*o),"easeOutCubic"===n.easing&&(a=--o*o*o+1),"easeInOutCubic"===n.easing&&(a=o<.5?4*o*o*o:(o-1)*(2*o-2)*(2*o-2)+1),"easeInQuart"===n.easing&&(a=o*o*o*o),"easeOutQuart"===n.easing&&(a=1- --o*o*o*o),"easeInOutQuart"===n.easing&&(a=o<.5?8*o*o*o*o:1-8*--o*o*o*o),"easeInQuint"===n.easing&&(a=o*o*o*o*o),"easeOutQuint"===n.easing&&(a=1+--o*o*o*o*o),"easeInOutQuint"===n.easing&&(a=o<.5?16*o*o*o*o*o:1+16*--o*o*o*o*o),n.customEasing&&(a=n.customEasing(o)),a||o),e.scrollTo(0,Math.floor(v)),I(v,b)||(e.requestAnimationFrame(O),h=t)};0===e.pageYOffset&&e.scrollTo(0,0),c.before(t,a),g.cancelScroll(),e.requestAnimationFrame(O)}};var p=function(e){s&&(s.id=s.getAttribute("data-scroll-id"),g.animateScroll(s,l),s=null,l=null)},v=function(t){if(!("matchMedia"in e&&e.matchMedia("(prefers-reduced-motion)").matches)&&0===t.button&&!t.metaKey&&!t.ctrlKey&&(l=t.target.closest(i))&&"a"===l.tagName.toLowerCase()&&!t.target.closest(u.ignore)&&l.hostname===e.location.hostname&&l.pathname===e.location.pathname&&/#/.test(l.href)){var n;try{n=a(decodeURIComponent(l.hash))}catch(e){n=a(l.hash)}if("#"===n){t.preventDefault();var o=(s=document.body).id?s.id:"smooth-scroll-top";return s.setAttribute("data-scroll-id",o),s.id="",void(e.location.hash.substring(1)===o?p():e.location.hash=o)}(s=document.querySelector(n))&&(s.setAttribute("data-scroll-id",s.id),s.id="",l.hash===e.location.hash&&(t.preventDefault(),p()))}},b=function(e){m||(m=setTimeout(function(){m=null,f=r(d)},66))};return g.destroy=function(){u&&(document.removeEventListener("click",v,!1),e.removeEventListener("resize",b,!1),g.cancelScroll(),u=null,s=null,l=null,d=null,f=null,m=null,h=null)},g.init=function(a){t&&(g.destroy(),u=o(n,a||{}),d=u.header?document.querySelector(u.header):null,f=r(d),document.addEventListener("click",v,!1),e.addEventListener("hashchange",p,!1),d&&e.addEventListener("resize",b,!1))},g.init(c),g}});
|
||||
Reference in New Issue
Block a user