blob: 903e9a9ca4d137ccc8aaa218ba7e19ff4024b5ac (
plain)
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
|
class DomHelper {
static isVisible(element) {
return element.offsetParent !== null;
}
static openNewTab(url) {
let win = window.open("");
win.opener = null;
win.location = url;
win.focus();
}
static scrollPageTo(element) {
let windowScrollPosition = window.pageYOffset;
let windowHeight = document.documentElement.clientHeight;
let viewportPosition = windowScrollPosition + windowHeight;
let itemBottomPosition = element.offsetTop + element.offsetHeight;
if (viewportPosition - itemBottomPosition < 0 || viewportPosition - element.offsetTop > windowHeight) {
window.scrollTo(0, element.offsetTop - 10);
}
}
static getVisibleElements(selector) {
let elements = document.querySelectorAll(selector);
let result = [];
for (let i = 0; i < elements.length; i++) {
if (this.isVisible(elements[i])) {
result.push(elements[i]);
}
}
return result;
}
static findParent(element, selector) {
for (; element && element !== document; element = element.parentNode) {
if (element.classList.contains(selector)) {
return element;
}
}
return null;
}
static hasPassiveEventListenerOption() {
var passiveSupported = false;
try {
var options = Object.defineProperty({}, "passive", {
get: function() {
passiveSupported = true;
}
});
window.addEventListener("test", options, options);
window.removeEventListener("test", options, options);
} catch(err) {
passiveSupported = false;
}
return passiveSupported;
}
}
|
