assist.js
1.53 KB
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
// 判断参数是否是其中之一
export function oneOf (value, validList) {
for (let i = 0; i < validList.length; i++) {
if (value === validList[i]) {
return true;
}
}
return false;
}
export function camelcaseToHyphen (str) {
return str.replace(/([a-z])([A-Z])/g, '$1-$2').toLowerCase();
}
// For Modal scrollBar hidden
let cached;
export function getScrollBarSize (fresh) {
if (fresh || cached === undefined) {
const inner = document.createElement('div');
inner.style.width = '100%';
inner.style.height = '200px';
const outer = document.createElement('div');
const outerStyle = outer.style;
outerStyle.position = 'absolute';
outerStyle.top = 0;
outerStyle.left = 0;
outerStyle.pointerEvents = 'none';
outerStyle.visibility = 'hidden';
outerStyle.width = '200px';
outerStyle.height = '150px';
outerStyle.overflow = 'hidden';
outer.appendChild(inner);
document.body.appendChild(outer);
const widthContained = inner.offsetWidth;
outer.style.overflow = 'scroll';
let widthScroll = inner.offsetWidth;
if (widthContained === widthScroll) {
widthScroll = outer.clientWidth;
}
document.body.removeChild(outer);
cached = widthContained - widthScroll;
}
return cached;
}
// watch DOM change
export const MutationObserver = window.MutationObserver || window.WebKitMutationObserver || window.MozMutationObserver || false;