source: trip-planner-front/node_modules/css-blank-pseudo/index.js@ 6a80231

Last change on this file since 6a80231 was 6a3a178, checked in by Ema <ema_spirova@…>, 3 years ago

initial commit

  • Property mode set to 100644
File size: 2.7 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); // form control elements selector
24
25 const selector = 'input,select,textarea'; // conditionally update all form control elements
26
27 Array.prototype.forEach.call(document.querySelectorAll(selector), node => {
28 node.addEventListener('input', configureCssBlankAttribute);
29 configureCssBlankAttribute.call(node);
30 }); // conditionally observe added or unobserve removed form control elements
31
32 new MutationObserver(mutationsList => {
33 mutationsList.forEach(mutation => {
34 if (mutation.addedNodes) {
35 mutation.addedNodes.forEach(node => {
36 if (node.nodeType === 1 && node.matches(selector)) {
37 node.addEventListener('input', configureCssBlankAttribute);
38 configureCssBlankAttribute.call(node);
39 }
40 });
41 }
42
43 if (mutation.removedNodes) {
44 mutation.removedNodes.forEach(node => {
45 if (node.nodeType === 1 && node.matches(selector)) {
46 node.removeEventListener('input', configureCssBlankAttribute);
47 }
48 });
49 }
50 });
51 }).observe(document, {
52 childList: true,
53 subtree: true
54 }); // update a form control element’s css-blank attribute
55
56 function configureCssBlankAttribute() {
57 if (this.value) {
58 if (attr) {
59 this.removeAttribute(attr);
60 }
61
62 if (className) {
63 this.classList.remove(className);
64 }
65
66 this.removeAttribute('blank');
67 } else {
68 if (attr) {
69 this.setAttribute('blank', attr);
70 }
71
72 if (className) {
73 this.classList.add(className);
74 }
75 }
76 } // observe changes to the "value" property on an HTML Element
77
78
79 function observeValueOfHTMLElement(HTMLElement) {
80 const descriptor = Object.getOwnPropertyDescriptor(HTMLElement.prototype, 'value');
81 const nativeSet = descriptor.set;
82
83 descriptor.set = function set(value) {
84 // eslint-disable-line no-unused-vars
85 nativeSet.apply(this, arguments);
86 configureCssBlankAttribute.apply(this);
87 };
88
89 Object.defineProperty(HTMLElement.prototype, 'value', descriptor);
90 }
91}
92
93module.exports = cssBlankPseudo;
94//# sourceMappingURL=index.js.map
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