https://youthfamilynttac.org/wp-content/plugins/uc-block-utils/uc-decorative-images/uc-decorative.js

1jQuery(document).ready(function($) {
2	function imageWarning(e) {
3		var block = $("<div>");
4		block.addClass("alert alert-danger accessibility-fail-msg");
5		block.width(e.width + "px");
6
7		var icon = $("<span>");
8		icon.addClass("glyphicon glyphicon-ban-circle");
9
10		var msg = $("<span>");
11		msg.append(
12			' This image needs a <a href="https://kb.uconn.edu/space/IKB/10779852898/Accessibility#Use-Good-Alt-Text">valid Alt tag.</a> ',
13		);
14
15		block.append(icon).append(msg);
16		$(e).after(block);
17	}
18
19	function isValidAlt(alt) {
20		if (typeof alt === "undefined" || alt === false || alt === null) {
21			return false;
22		}
23		if (alt === "") {
24			return false;
25		}
26		var altLower = alt.toLowerCase();
27		if (
28			altLower.indexOf(".jpg") >= 0 ||
29			altLower.indexOf(".png") >= 0 ||
30			altLower.indexOf(".gif") >= 0
31		) {
32			return false;
33		}
34		return true;
35	}
36
37	function removeAccessibilityWarning(img) {
38		var $img = $(img);
39		$img.removeClass("accessibility-fail");
40		$img.next(".accessibility-fail-msg").remove();
41	}
42
43	// translatepress uses empty-alt flag images, so we have an exception
44	function isTranslatePressFlag(img) {
45		return $(img).is(".trp-language-switcher img.trp-flag-image");
46	}
47
48	$("#page img").each(function() {
49		if (isTranslatePressFlag(this)) return;
50		if ($(this).hasClass("avatar") || $(this).hasClass("decorative")) return;
51		if ($(this).closest(".decorative").length > 0) return;
52		if ($(this).closest(".ms-youtube").length > 0) return;
53		var alt = $(this).attr("alt");
54		if (
55			$(this).closest(".so-parallax").length > 0 ||
56			$(this).closest(".flex-control-thumbs").length > 0
57		) {
58			if (typeof alt === "undefined" || alt === false) $(this).attr("alt", "");
59			return;
60		}
61		if (alt === "") {
62			$(this).addClass("accessibility-fail");
63			imageWarning(this);
64		}
65		if (undefined != alt) {
66			alt = alt.toLowerCase();
67			if (
68				alt.indexOf(".jpg") >= 0 ||
69				alt.indexOf(".png") >= 0 ||
70				alt.indexOf(".gif") >= 0
71			) {
72				$(this).addClass("accessibility-fail");
73				imageWarning(this);
74			}
75		} else {
76			$(this).addClass("accessibility-fail");
77			imageWarning(this);
78		}
79	});
80
81	if (window.MutationObserver) {
82		var observer = new MutationObserver(function(mutations) {
83			mutations.forEach(function(mutation) {
84				if (mutation.type === "attributes" && mutation.attributeName === "alt") {
85					var $img = $(mutation.target);
86					if ($img.hasClass("accessibility-fail")) {
87						var newAlt = $img.attr("alt");
88						if (isValidAlt(newAlt)) {
89							removeAccessibilityWarning(mutation.target);
90						}
91					}
92				}
93			});
94		});
95
96		$("#page img.accessibility-fail").each(function() {
97			observer.observe(this, {
98				attributes: true,
99				attributeFilter: ["alt"]
100			});
101		});
102	}
103
104	$("#page table").each(function() {
105		$(this).addClass("table");
106	});
107});