source: trip-planner-front/node_modules/css-blank-pseudo/legacy.js@ b738035

Last change on this file since b738035 was 6a3a178, checked in by Ema <ema_spirova@…>, 3 years ago

initial commit

  • Property mode set to 100644
File size: 3.9 KB
Line 
1'use strict';
2
3function cssBlankPseudo(document, opts) {
4 // configuration
5 const className = Object(opts).className;
6 const attr = Object(opts).attr || 'blank';
7 const force = Object(opts).force;
8
9 try {
10 document.querySelector(':blank');
11
12 if (!force) {
13 return;
14 }
15 } catch (ignoredError) {}
16 /* do nothing and continue */
17 // observe value changes on <input>, <select>, and <textarea>
18
19
20 const window = (document.ownerDocument || document).defaultView;
21 observeValueOfHTMLElement(window.HTMLInputElement);
22 observeValueOfHTMLElement(window.HTMLSelectElement);
23 observeValueOfHTMLElement(window.HTMLTextAreaElement);
24 observeSelectedOfHTMLElement(window.HTMLOptionElement); // form control elements selector
25
26 const selector = 'INPUT,SELECT,TEXTAREA';
27 const selectorRegExp = /^(INPUT|SELECT|TEXTAREA)$/; // conditionally update all form control elements
28
29 Array.prototype.forEach.call(document.querySelectorAll(selector), node => {
30 if (node.nodeName === 'SELECT') {
31 node.addEventListener('change', configureCssBlankAttribute);
32 } else {
33 node.addEventListener('input', configureCssBlankAttribute);
34 }
35
36 configureCssBlankAttribute.call(node);
37 }); // conditionally observe added or unobserve removed form control elements
38
39 new MutationObserver(mutationsList => {
40 mutationsList.forEach(mutation => {
41 Array.prototype.forEach.call(mutation.addedNodes || [], node => {
42 if (node.nodeType === 1 && selectorRegExp.test(node.nodeName)) {
43 if (node.nodeName === 'SELECT') {
44 node.addEventListener('change', configureCssBlankAttribute);
45 } else {
46 node.addEventListener('input', configureCssBlankAttribute);
47 }
48
49 configureCssBlankAttribute.call(node);
50 }
51 });
52 Array.prototype.forEach.call(mutation.removedNodes || [], node => {
53 if (node.nodeType === 1 && selectorRegExp.test(node.nodeName)) {
54 if (node.nodeName === 'SELECT') {
55 node.removeEventListener('change', configureCssBlankAttribute);
56 } else {
57 node.removeEventListener('input', configureCssBlankAttribute);
58 }
59 }
60 });
61 });
62 }).observe(document, {
63 childList: true,
64 subtree: true
65 }); // update a form control element’s css-blank attribute
66
67 function configureCssBlankAttribute() {
68 if (this.value || this.nodeName === 'SELECT' && this.options[this.selectedIndex].value) {
69 if (attr) {
70 this.removeAttribute(attr);
71 }
72
73 if (className) {
74 this.classList.remove(className);
75 }
76
77 this.removeAttribute('blank');
78 } else {
79 if (attr) {
80 this.setAttribute('blank', attr);
81 }
82
83 if (className) {
84 this.classList.add(className);
85 }
86 }
87 } // observe changes to the "value" property on an HTML Element
88
89
90 function observeValueOfHTMLElement(HTMLElement) {
91 const descriptor = Object.getOwnPropertyDescriptor(HTMLElement.prototype, 'value');
92 const nativeSet = descriptor.set;
93
94 descriptor.set = function set(value) {
95 // eslint-disable-line no-unused-vars
96 nativeSet.apply(this, arguments);
97 configureCssBlankAttribute.apply(this);
98 };
99
100 Object.defineProperty(HTMLElement.prototype, 'value', descriptor);
101 } // observe changes to the "selected" property on an HTML Element
102
103
104 function observeSelectedOfHTMLElement(HTMLElement) {
105 const descriptor = Object.getOwnPropertyDescriptor(HTMLElement.prototype, 'selected');
106 const nativeSet = descriptor.set;
107
108 descriptor.set = function set(value) {
109 // eslint-disable-line no-unused-vars
110 nativeSet.apply(this, arguments);
111 const event = document.createEvent('Event');
112 event.initEvent('change', true, true);
113 this.dispatchEvent(event);
114 };
115
116 Object.defineProperty(HTMLElement.prototype, 'selected', descriptor);
117 }
118}
119
120module.exports = cssBlankPseudo;
121//# sourceMappingURL=legacy.js.map
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