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
|
import { has } from 'lodash';
import { isInIssuePage, isInMRPage, isInEpicPage } from './common_utils';
/**
* Checks whether an element's content exceeds the element's width.
*
* @param element DOM element to check
*/
export const hasHorizontalOverflow = element =>
Boolean(element && element.scrollWidth > element.offsetWidth);
export const addClassIfElementExists = (element, className) => {
if (element) {
element.classList.add(className);
}
};
export const isInVueNoteablePage = () => isInIssuePage() || isInEpicPage() || isInMRPage();
export const canScrollUp = ({ scrollTop }, margin = 0) => scrollTop > margin;
export const canScrollDown = ({ scrollTop, offsetHeight, scrollHeight }, margin = 0) =>
scrollTop + offsetHeight < scrollHeight - margin;
export const toggleContainerClasses = (containerEl, classList) => {
if (containerEl) {
// eslint-disable-next-line array-callback-return
Object.entries(classList).map(([key, value]) => {
if (value) {
containerEl.classList.add(key);
} else {
containerEl.classList.remove(key);
}
});
}
};
/**
* Return a object mapping element dataset names to booleans.
*
* This is useful for data- attributes whose presense represent
* a truthiness, no matter the value of the attribute. The absense of the
* attribute represents falsiness.
*
* This can be useful when Rails-provided boolean-like values are passed
* directly to the HAML template, rather than cast to a string.
*
* @param {HTMLElement} element - The DOM element to inspect
* @param {string[]} names - The dataset (i.e., camelCase) names to inspect
* @returns {Object.<string, boolean>}
*/
export const parseBooleanDataAttributes = ({ dataset }, names) =>
names.reduce((acc, name) => {
acc[name] = has(dataset, name);
return acc;
}, {});
/**
* Returns whether or not the provided element is currently visible.
* This function operates identically to jQuery's `:visible` pseudo-selector.
* Documentation for this selector: https://api.jquery.com/visible-selector/
* Implementation of this selector: https://github.com/jquery/jquery/blob/d0ce00cdfa680f1f0c38460bc51ea14079ae8b07/src/css/hiddenVisibleSelectors.js#L8
* @param {HTMLElement} element The element to test
* @returns {Boolean} `true` if the element is currently visible, otherwise false
*/
export const isElementVisible = element =>
Boolean(element.offsetWidth || element.offsetHeight || element.getClientRects().length);
/**
* The opposite of `isElementVisible`.
* Returns whether or not the provided element is currently hidden.
* This function operates identically to jQuery's `:hidden` pseudo-selector.
* Documentation for this selector: https://api.jquery.com/hidden-selector/
* Implementation of this selector: https://github.com/jquery/jquery/blob/d0ce00cdfa680f1f0c38460bc51ea14079ae8b07/src/css/hiddenVisibleSelectors.js#L6
* @param {HTMLElement} element The element to test
* @returns {Boolean} `true` if the element is currently hidden, otherwise false
*/
export const isElementHidden = element => !isElementVisible(element);
|
