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This updates the `scrollTo` jQuery plugin included in Twenty Seventeen to the latest version, `2.1.3`. For a full list of changes in this update, see GitHub: https://github.com/flesler/jquery.scrollTo/compare/2.1.2...v2.1.3. Props sarahricker, mukesh27, desrosj. Fixes #56702. Built from https://develop.svn.wordpress.org/trunk@54374 git-svn-id: http://core.svn.wordpress.org/trunk@53933 1a063a9b-81f0-0310-95a4-ce76da25c4cd
216 lines
5.7 KiB
JavaScript
216 lines
5.7 KiB
JavaScript
/*!
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* jQuery.scrollTo
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* Copyright (c) 2007 Ariel Flesler - aflesler ○ gmail • com | https://github.com/flesler
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* Licensed under MIT
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* https://github.com/flesler/jquery.scrollTo
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* @projectDescription Lightweight, cross-browser and highly customizable animated scrolling with jQuery
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* @author Ariel Flesler
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* @version 2.1.3
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*/
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;(function(factory) {
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'use strict';
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if (typeof define === 'function' && define.amd) {
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// AMD
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define(['jquery'], factory);
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} else if (typeof module !== 'undefined' && module.exports) {
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// CommonJS
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module.exports = factory(require('jquery'));
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} else {
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// Global
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factory(jQuery);
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}
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})(function($) {
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'use strict';
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var $scrollTo = $.scrollTo = function(target, duration, settings) {
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return $(window).scrollTo(target, duration, settings);
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};
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$scrollTo.defaults = {
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axis:'xy',
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duration: 0,
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limit:true
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};
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function isWin(elem) {
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return !elem.nodeName ||
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$.inArray(elem.nodeName.toLowerCase(), ['iframe','#document','html','body']) !== -1;
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}
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function isFunction(obj) {
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// Brought from jQuery since it's deprecated
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return typeof obj === 'function'
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}
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$.fn.scrollTo = function(target, duration, settings) {
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if (typeof duration === 'object') {
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settings = duration;
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duration = 0;
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}
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if (typeof settings === 'function') {
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settings = { onAfter:settings };
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}
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if (target === 'max') {
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target = 9e9;
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}
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settings = $.extend({}, $scrollTo.defaults, settings);
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// Speed is still recognized for backwards compatibility
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duration = duration || settings.duration;
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// Make sure the settings are given right
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var queue = settings.queue && settings.axis.length > 1;
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if (queue) {
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// Let's keep the overall duration
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duration /= 2;
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}
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settings.offset = both(settings.offset);
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settings.over = both(settings.over);
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return this.each(function() {
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// Null target yields nothing, just like jQuery does
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if (target === null) return;
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var win = isWin(this),
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elem = win ? this.contentWindow || window : this,
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$elem = $(elem),
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targ = target,
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attr = {},
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toff;
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switch (typeof targ) {
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// A number will pass the regex
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case 'number':
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case 'string':
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if (/^([+-]=?)?\d+(\.\d+)?(px|%)?$/.test(targ)) {
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targ = both(targ);
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// We are done
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break;
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}
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// Relative/Absolute selector
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targ = win ? $(targ) : $(targ, elem);
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/* falls through */
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case 'object':
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if (targ.length === 0) return;
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// DOMElement / jQuery
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if (targ.is || targ.style) {
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// Get the real position of the target
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toff = (targ = $(targ)).offset();
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}
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}
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var offset = isFunction(settings.offset) && settings.offset(elem, targ) || settings.offset;
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$.each(settings.axis.split(''), function(i, axis) {
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var Pos = axis === 'x' ? 'Left' : 'Top',
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pos = Pos.toLowerCase(),
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key = 'scroll' + Pos,
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prev = $elem[key](),
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max = $scrollTo.max(elem, axis);
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if (toff) {// jQuery / DOMElement
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attr[key] = toff[pos] + (win ? 0 : prev - $elem.offset()[pos]);
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// If it's a dom element, reduce the margin
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if (settings.margin) {
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attr[key] -= parseInt(targ.css('margin'+Pos), 10) || 0;
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attr[key] -= parseInt(targ.css('border'+Pos+'Width'), 10) || 0;
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}
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attr[key] += offset[pos] || 0;
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if (settings.over[pos]) {
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// Scroll to a fraction of its width/height
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attr[key] += targ[axis === 'x'?'width':'height']() * settings.over[pos];
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}
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} else {
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var val = targ[pos];
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// Handle percentage values
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attr[key] = val.slice && val.slice(-1) === '%' ?
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parseFloat(val) / 100 * max
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: val;
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}
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// Number or 'number'
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if (settings.limit && /^\d+$/.test(attr[key])) {
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// Check the limits
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attr[key] = attr[key] <= 0 ? 0 : Math.min(attr[key], max);
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}
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// Don't waste time animating, if there's no need.
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if (!i && settings.axis.length > 1) {
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if (prev === attr[key]) {
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// No animation needed
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attr = {};
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} else if (queue) {
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// Intermediate animation
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animate(settings.onAfterFirst);
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// Don't animate this axis again in the next iteration.
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attr = {};
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}
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}
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});
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animate(settings.onAfter);
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function animate(callback) {
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var opts = $.extend({}, settings, {
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// The queue setting conflicts with animate()
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// Force it to always be true
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queue: true,
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duration: duration,
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complete: callback && function() {
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callback.call(elem, targ, settings);
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}
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});
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$elem.animate(attr, opts);
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}
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});
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};
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// Max scrolling position, works on quirks mode
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// It only fails (not too badly) on IE, quirks mode.
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$scrollTo.max = function(elem, axis) {
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var Dim = axis === 'x' ? 'Width' : 'Height',
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scroll = 'scroll'+Dim;
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if (!isWin(elem))
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return elem[scroll] - $(elem)[Dim.toLowerCase()]();
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var size = 'client' + Dim,
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doc = elem.ownerDocument || elem.document,
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html = doc.documentElement,
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body = doc.body;
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return Math.max(html[scroll], body[scroll]) - Math.min(html[size], body[size]);
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};
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function both(val) {
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return isFunction(val) || $.isPlainObject(val) ? val : { top:val, left:val };
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}
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// Add special hooks so that window scroll properties can be animated
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$.Tween.propHooks.scrollLeft =
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$.Tween.propHooks.scrollTop = {
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get: function(t) {
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return $(t.elem)[t.prop]();
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},
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set: function(t) {
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var curr = this.get(t);
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// If interrupt is true and user scrolled, stop animating
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if (t.options.interrupt && t._last && t._last !== curr) {
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return $(t.elem).stop();
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}
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var next = Math.round(t.now);
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// Don't waste CPU
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// Browsers don't render floating point scroll
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if (curr !== next) {
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$(t.elem)[t.prop](next);
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t._last = this.get(t);
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}
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}
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};
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// AMD requirement
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return $scrollTo;
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});
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