source: trip-planner-front/node_modules/css-blank-pseudo/index.mjs@ fa375fe

Last change on this file since fa375fe was 6a3a178, checked in by Ema <ema_spirova@…>, 3 years ago

initial commit

  • Property mode set to 100644
File size: 2.7 KB
Line 
1function cssBlankPseudo(document, opts) {
2 // configuration
3 const className = Object(opts).className;
4 const attr = Object(opts).attr || 'blank';
5 const force = Object(opts).force;
6
7 try {
8 document.querySelector(':blank');
9
10 if (!force) {
11 return;
12 }
13 } catch (ignoredError) {}
14 /* do nothing and continue */
15 // observe value changes on <input>, <select>, and <textarea>
16
17
18 const window = (document.ownerDocument || document).defaultView;
19 observeValueOfHTMLElement(window.HTMLInputElement);
20 observeValueOfHTMLElement(window.HTMLSelectElement);
21 observeValueOfHTMLElement(window.HTMLTextAreaElement); // form control elements selector
22
23 const selector = 'input,select,textarea'; // conditionally update all form control elements
24
25 Array.prototype.forEach.call(document.querySelectorAll(selector), node => {
26 node.addEventListener('input', configureCssBlankAttribute);
27 configureCssBlankAttribute.call(node);
28 }); // conditionally observe added or unobserve removed form control elements
29
30 new MutationObserver(mutationsList => {
31 mutationsList.forEach(mutation => {
32 if (mutation.addedNodes) {
33 mutation.addedNodes.forEach(node => {
34 if (node.nodeType === 1 && node.matches(selector)) {
35 node.addEventListener('input', configureCssBlankAttribute);
36 configureCssBlankAttribute.call(node);
37 }
38 });
39 }
40
41 if (mutation.removedNodes) {
42 mutation.removedNodes.forEach(node => {
43 if (node.nodeType === 1 && node.matches(selector)) {
44 node.removeEventListener('input', configureCssBlankAttribute);
45 }
46 });
47 }
48 });
49 }).observe(document, {
50 childList: true,
51 subtree: true
52 }); // update a form control element’s css-blank attribute
53
54 function configureCssBlankAttribute() {
55 if (this.value) {
56 if (attr) {
57 this.removeAttribute(attr);
58 }
59
60 if (className) {
61 this.classList.remove(className);
62 }
63
64 this.removeAttribute('blank');
65 } else {
66 if (attr) {
67 this.setAttribute('blank', attr);
68 }
69
70 if (className) {
71 this.classList.add(className);
72 }
73 }
74 } // observe changes to the "value" property on an HTML Element
75
76
77 function observeValueOfHTMLElement(HTMLElement) {
78 const descriptor = Object.getOwnPropertyDescriptor(HTMLElement.prototype, 'value');
79 const nativeSet = descriptor.set;
80
81 descriptor.set = function set(value) {
82 // eslint-disable-line no-unused-vars
83 nativeSet.apply(this, arguments);
84 configureCssBlankAttribute.apply(this);
85 };
86
87 Object.defineProperty(HTMLElement.prototype, 'value', descriptor);
88 }
89}
90
91export default cssBlankPseudo;
92//# sourceMappingURL=index.mjs.map
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