https://www.libriincantina.it/wp-includes/js/jquery/ui/effect-shake.js?ver=1.14.2

1/*!
2 * jQuery UI Effects Shake 1.14.2
3 * https://jqueryui.com
4 *
5 * Copyright OpenJS Foundation and other contributors
6 * Released under the MIT license.
7 * https://jquery.org/license
8 */
9
10//>>label: Shake Effect
11//>>group: Effects
12//>>description: Shakes an element horizontally or vertically n times.
13//>>docs: https://api.jqueryui.com/shake-effect/
14//>>demos: https://jqueryui.com/effect/
15
16( function( factory ) {
17	"use strict";
18
19	if ( typeof define === "function" && define.amd ) {
20
21		// AMD. Register as an anonymous module.
22		define( [
23			"jquery",
24			"../version",
25			"../effect"
26		], factory );
27	} else {
28
29		// Browser globals
30		factory( jQuery );
31	}
32} )( function( $ ) {
33"use strict";
34
35return $.effects.define( "shake", function( options, done ) {
36
37	var i = 1,
38		element = $( this ),
39		direction = options.direction || "left",
40		distance = options.distance || 20,
41		times = options.times || 3,
42		anims = times * 2 + 1,
43		speed = Math.round( options.duration / anims ),
44		ref = ( direction === "up" || direction === "down" ) ? "top" : "left",
45		positiveMotion = ( direction === "up" || direction === "left" ),
46		animation = {},
47		animation1 = {},
48		animation2 = {},
49
50		queuelen = element.queue().length;
51
52	$.effects.createPlaceholder( element );
53
54	// Animation
55	animation[ ref ] = ( positiveMotion ? "-=" : "+=" ) + distance;
56	animation1[ ref ] = ( positiveMotion ? "+=" : "-=" ) + distance * 2;
57	animation2[ ref ] = ( positiveMotion ? "-=" : "+=" ) + distance * 2;
58
59	// Animate
60	element.animate( animation, speed, options.easing );
61
62	// Shakes
63	for ( ; i < times; i++ ) {
64		element
65			.animate( animation1, speed, options.easing )
66			.animate( animation2, speed, options.easing );
67	}
68
69	element
70		.animate( animation1, speed, options.easing )
71		.animate( animation, speed / 2, options.easing )
72		.queue( done );
73
74	$.effects.unshift( element, queuelen, anims + 1 );
75} );
76
77} );