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https://notionpress.com/assets/read_insta/js/jquery.scrollTo.js

js notionpress.com collected 2026-09-24 08:49:52 UTC 5,726 bytes, 210 lines download raw bytes

vendor: 5,726 bytes, lines 1-210
1/*!
2 * jQuery.scrollTo
3 * Copyright (c) 2007-2015 Ariel Flesler - aflesler<a>gmail<d>com | http://flesler.blogspot.com
4 * Licensed under MIT
5 * http://flesler.blogspot.com/2007/10/jqueryscrollto.html
6 * @projectDescription Lightweight, cross-browser and highly customizable animated scrolling with jQuery
7 * @author Ariel Flesler
8 * @version 2.1.2
9 */
10;(function(factory) {
11	'use strict';
12	if (typeof define === 'function' && define.amd) {
13		// AMD
14		define(['jquery'], factory);
15	} else if (typeof module !== 'undefined' && module.exports) {
16		// CommonJS
17		module.exports = factory(require('jquery'));
18	} else {
19		// Global
20		factory(jQuery);
21	}
22})(function($) {
23	'use strict';
24
25	var $scrollTo = $.scrollTo = function(target, duration, settings) {
26		return $(window).scrollTo(target, duration, settings);
27	};
28
29	$scrollTo.defaults = {
30		axis:'xy',
31		duration: 0,
32		limit:true
33	};
34
35	function isWin(elem) {
36		return !elem.nodeName ||
37			$.inArray(elem.nodeName.toLowerCase(), ['iframe','#document','html','body']) !== -1;
38	}		
39
40	$.fn.scrollTo = function(target, duration, settings) {
41		if (typeof duration === 'object') {
42			settings = duration;
43			duration = 0;
44		}
45		if (typeof settings === 'function') {
46			settings = { onAfter:settings };
47		}
48		if (target === 'max') {
49			target = 9e9;
50		}
51
52		settings = $.extend({}, $scrollTo.defaults, settings);
53		// Speed is still recognized for backwards compatibility
54		duration = duration || settings.duration;
55		// Make sure the settings are given right
56		var queue = settings.queue && settings.axis.length > 1;
57		if (queue) {
58			// Let's keep the overall duration
59			duration /= 2;
60		}
61		settings.offset = both(settings.offset);
62		settings.over = both(settings.over);
63
64		return this.each(function() {
65			// Null target yields nothing, just like jQuery does
66			if (target === null) return;
67
68			var win = isWin(this),
69				elem = win ? this.contentWindow || window : this,
70				$elem = $(elem),
71				targ = target, 
72				attr = {},
73				toff;
74
75			switch (typeof targ) {
76				// A number will pass the regex
77				case 'number':
78				case 'string':
79					if (/^([+-]=?)?\d+(\.\d+)?(px|%)?$/.test(targ)) {
80						targ = both(targ);
81						// We are done
82						break;
83					}
84					// Relative/Absolute selector
85					targ = win ? $(targ) : $(targ, elem);
86					/* falls through */
87				case 'object':
88					if (targ.length === 0) return;
89					// DOMElement / jQuery
90					if (targ.is || targ.style) {
91						// Get the real position of the target
92						toff = (targ = $(targ)).offset();
93					}
94			}
95
96			var offset = $.isFunction(settings.offset) && settings.offset(elem, targ) || settings.offset;
97
98			$.each(settings.axis.split(''), function(i, axis) {
99				var Pos	= axis === 'x' ? 'Left' : 'Top',
100					pos = Pos.toLowerCase(),
101					key = 'scroll' + Pos,
102					prev = $elem[key](),
103					max = $scrollTo.max(elem, axis);
104
105				if (toff) {// jQuery / DOMElement
106					attr[key] = toff[pos] + (win ? 0 : prev - $elem.offset()[pos]);
107
108					// If it's a dom element, reduce the margin
109					if (settings.margin) {
110						attr[key] -= parseInt(targ.css('margin'+Pos), 10) || 0;
111						attr[key] -= parseInt(targ.css('border'+Pos+'Width'), 10) || 0;
112					}
113
114					attr[key] += offset[pos] || 0;
115
116					if (settings.over[pos]) {
117						// Scroll to a fraction of its width/height
118						attr[key] += targ[axis === 'x'?'width':'height']() * settings.over[pos];
119					}
120				} else {
121					var val = targ[pos];
122					// Handle percentage values
123					attr[key] = val.slice && val.slice(-1) === '%' ?
124						parseFloat(val) / 100 * max
125						: val;
126				}
127
128				// Number or 'number'
129				if (settings.limit && /^\d+$/.test(attr[key])) {
130					// Check the limits
131					attr[key] = attr[key] <= 0 ? 0 : Math.min(attr[key], max);
132				}
133
134				// Don't waste time animating, if there's no need.
135				if (!i && settings.axis.length > 1) {
136					if (prev === attr[key]) {
137						// No animation needed
138						attr = {};
139					} else if (queue) {
140						// Intermediate animation
141						animate(settings.onAfterFirst);
142						// Don't animate this axis again in the next iteration.
143						attr = {};
144					}
145				}
146			});
147
148			animate(settings.onAfter);
149
150			function animate(callback) {
151				var opts = $.extend({}, settings, {
152					// The queue setting conflicts with animate()
153					// Force it to always be true
154					queue: true,
155					duration: duration,
156					complete: callback && function() {
157						callback.call(elem, targ, settings);
158					}
159				});
160				$elem.animate(attr, opts);
161			}
162		});
163	};
164
165	// Max scrolling position, works on quirks mode
166	// It only fails (not too badly) on IE, quirks mode.
167	$scrollTo.max = function(elem, axis) {
168		var Dim = axis === 'x' ? 'Width' : 'Height',
169			scroll = 'scroll'+Dim;
170
171		if (!isWin(elem))
172			return elem[scroll] - $(elem)[Dim.toLowerCase()]();
173
174		var size = 'client' + Dim,
175			doc = elem.ownerDocument || elem.document,
176			html = doc.documentElement,
177			body = doc.body;
178
179		return Math.max(html[scroll], body[scroll]) - Math.min(html[size], body[size]);
180	};
181
182	function both(val) {
183		return $.isFunction(val) || $.isPlainObject(val) ? val : { top:val, left:val };
184	}
185
186	// Add special hooks so that window scroll properties can be animated
187	$.Tween.propHooks.scrollLeft = 
188	$.Tween.propHooks.scrollTop = {
189		get: function(t) {
190			return $(t.elem)[t.prop]();
191		},
192		set: function(t) {
193			var curr = this.get(t);
194			// If interrupt is true and user scrolled, stop animating
195			if (t.options.interrupt && t._last && t._last !== curr) {
196				return $(t.elem).stop();
197			}
198			var next = Math.round(t.now);
199			// Don't waste CPU
200			// Browsers don't render floating point scroll
201			if (curr !== next) {
202				$(t.elem)[t.prop](next);
203				t._last = this.get(t);
204			}
205		}
206	};
207
208	// AMD requirement
209	return $scrollTo;
210});

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