1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
|
/*
Details Element Polyfill 2.4.0
Copyright © 2019 Javan Makhmali
*/
(function() {
"use strict";
var element = document.createElement("details");
var elementIsNative = typeof HTMLDetailsElement != "undefined" && element instanceof HTMLDetailsElement;
var support = {
open: "open" in element || elementIsNative,
toggle: "ontoggle" in element
};
var styles = '\ndetails, summary {\n display: block;\n}\ndetails:not([open]) > *:not(summary) {\n display: none;\n}\nsummary::before {\n content: "►";\n padding-right: 0.3rem;\n font-size: 0.6rem;\n cursor: default;\n}\n[open] > summary::before {\n content: "▼";\n}\n';
var _ref = [], forEach = _ref.forEach, slice = _ref.slice;
if (!support.open) {
polyfillStyles();
polyfillProperties();
polyfillToggle();
polyfillAccessibility();
}
if (support.open && !support.toggle) {
polyfillToggleEvent();
}
function polyfillStyles() {
document.head.insertAdjacentHTML("afterbegin", "<style>" + styles + "</style>");
}
function polyfillProperties() {
var prototype = document.createElement("details").constructor.prototype;
var setAttribute = prototype.setAttribute, removeAttribute = prototype.removeAttribute;
var open = Object.getOwnPropertyDescriptor(prototype, "open");
Object.defineProperties(prototype, {
open: {
get: function get() {
if (this.tagName == "DETAILS") {
return this.hasAttribute("open");
} else {
if (open && open.get) {
return open.get.call(this);
}
}
},
set: function set(value) {
if (this.tagName == "DETAILS") {
return value ? this.setAttribute("open", "") : this.removeAttribute("open");
} else {
if (open && open.set) {
return open.set.call(this, value);
}
}
}
},
setAttribute: {
value: function value(name, _value) {
var _this = this;
var call = function call() {
return setAttribute.call(_this, name, _value);
};
if (name == "open" && this.tagName == "DETAILS") {
var wasOpen = this.hasAttribute("open");
var result = call();
if (!wasOpen) {
var summary = this.querySelector("summary");
if (summary) summary.setAttribute("aria-expanded", true);
triggerToggle(this);
}
return result;
}
return call();
}
},
removeAttribute: {
value: function value(name) {
var _this2 = this;
var call = function call() {
return removeAttribute.call(_this2, name);
};
if (name == "open" && this.tagName == "DETAILS") {
var wasOpen = this.hasAttribute("open");
var result = call();
if (wasOpen) {
var summary = this.querySelector("summary");
if (summary) summary.setAttribute("aria-expanded", false);
triggerToggle(this);
}
return result;
}
return call();
}
}
});
}
function polyfillToggle() {
onTogglingTrigger(function(element) {
element.hasAttribute("open") ? element.removeAttribute("open") : element.setAttribute("open", "");
});
}
function polyfillToggleEvent() {
if (window.MutationObserver) {
new MutationObserver(function(mutations) {
forEach.call(mutations, function(mutation) {
var target = mutation.target, attributeName = mutation.attributeName;
if (target.tagName == "DETAILS" && attributeName == "open") {
triggerToggle(target);
}
});
}).observe(document.documentElement, {
attributes: true,
subtree: true
});
} else {
onTogglingTrigger(function(element) {
var wasOpen = element.getAttribute("open");
setTimeout(function() {
var isOpen = element.getAttribute("open");
if (wasOpen != isOpen) {
triggerToggle(element);
}
}, 1);
});
}
}
function polyfillAccessibility() {
setAccessibilityAttributes(document);
if (window.MutationObserver) {
new MutationObserver(function(mutations) {
forEach.call(mutations, function(mutation) {
forEach.call(mutation.addedNodes, setAccessibilityAttributes);
});
}).observe(document.documentElement, {
subtree: true,
childList: true
});
} else {
document.addEventListener("DOMNodeInserted", function(event) {
setAccessibilityAttributes(event.target);
});
}
}
function setAccessibilityAttributes(root) {
findElementsWithTagName(root, "SUMMARY").forEach(function(summary) {
var details = findClosestElementWithTagName(summary, "DETAILS");
summary.setAttribute("aria-expanded", details.hasAttribute("open"));
if (!summary.hasAttribute("tabindex")) summary.setAttribute("tabindex", "0");
if (!summary.hasAttribute("role")) summary.setAttribute("role", "button");
});
}
function eventIsSignificant(event) {
return !(event.defaultPrevented || event.ctrlKey || event.metaKey || event.shiftKey || event.target.isContentEditable);
}
function onTogglingTrigger(callback) {
addEventListener("click", function(event) {
if (eventIsSignificant(event)) {
if (event.which <= 1) {
var element = findClosestElementWithTagName(event.target, "SUMMARY");
if (element && element.parentNode && element.parentNode.tagName == "DETAILS") {
callback(element.parentNode);
}
}
}
}, false);
addEventListener("keydown", function(event) {
if (eventIsSignificant(event)) {
if (event.keyCode == 13 || event.keyCode == 32) {
var element = findClosestElementWithTagName(event.target, "SUMMARY");
if (element && element.parentNode && element.parentNode.tagName == "DETAILS") {
callback(element.parentNode);
event.preventDefault();
}
}
}
}, false);
}
function triggerToggle(element) {
var event = document.createEvent("Event");
event.initEvent("toggle", false, false);
element.dispatchEvent(event);
}
function findElementsWithTagName(root, tagName) {
return (root.tagName == tagName ? [ root ] : []).concat(typeof root.getElementsByTagName == "function" ? slice.call(root.getElementsByTagName(tagName)) : []);
}
function findClosestElementWithTagName(element, tagName) {
if (typeof element.closest == "function") {
return element.closest(tagName);
} else {
while (element) {
if (element.tagName == tagName) {
return element;
} else {
element = element.parentNode;
}
}
}
}
})();
|
