1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
import { upperFirst } from 'lodash-es';
export interface ViewportOffsetResult {
left: number;
top: number;
right: number;
bottom: number;
rightIncludeBody: number;
bottomIncludeBody: number;
}
export function getBoundingClientRect(element: Element): DOMRect | number {
if (!element || !element.getBoundingClientRect) {
return 0;
}
return element.getBoundingClientRect();
}
vben
authored
5 years ago
18
Vben
authored
4 years ago
19
function trim(string: string) {
20
return (string || '').replace(/^[\s\uFEFF]+|[\s\uFEFF]+$/g, '');
Vben
authored
4 years ago
21
}
vben
authored
5 years ago
22
23
24
25
26
27
28
29
30
31
32
/* istanbul ignore next */
export function hasClass(el: Element, cls: string) {
if (!el || !cls) return false;
if (cls.indexOf(' ') !== -1) throw new Error('className should not contain space.');
if (el.classList) {
return el.classList.contains(cls);
} else {
return (' ' + el.className + ' ').indexOf(' ' + cls + ' ') > -1;
}
}
vben
authored
5 years ago
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
/* istanbul ignore next */
export function addClass(el: Element, cls: string) {
if (!el) return;
let curClass = el.className;
const classes = (cls || '').split(' ');
for (let i = 0, j = classes.length; i < j; i++) {
const clsName = classes[i];
if (!clsName) continue;
if (el.classList) {
el.classList.add(clsName);
} else if (!hasClass(el, clsName)) {
curClass += ' ' + clsName;
}
}
if (!el.classList) {
el.className = curClass;
}
}
/* istanbul ignore next */
export function removeClass(el: Element, cls: string) {
if (!el || !cls) return;
const classes = cls.split(' ');
let curClass = ' ' + el.className + ' ';
for (let i = 0, j = classes.length; i < j; i++) {
const clsName = classes[i];
if (!clsName) continue;
if (el.classList) {
el.classList.remove(clsName);
} else if (hasClass(el, clsName)) {
curClass = curClass.replace(' ' + clsName + ' ', ' ');
}
}
if (!el.classList) {
el.className = trim(curClass);
}
}
/**
vben
authored
4 years ago
76
77
78
79
80
81
82
* Get the left and top offset of the current element
* left: the distance between the leftmost element and the left side of the document
* top: the distance from the top of the element to the top of the document
* right: the distance from the far right of the element to the right of the document
* bottom: the distance from the bottom of the element to the bottom of the document
* rightIncludeBody: the distance between the leftmost element and the right side of the document
* bottomIncludeBody: the distance from the bottom of the element to the bottom of the document
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
*
* @description:
*/
export function getViewportOffset(element: Element): ViewportOffsetResult {
const doc = document.documentElement;
const docScrollLeft = doc.scrollLeft;
const docScrollTop = doc.scrollTop;
const docClientLeft = doc.clientLeft;
const docClientTop = doc.clientTop;
const pageXOffset = window.pageXOffset;
const pageYOffset = window.pageYOffset;
const box = getBoundingClientRect(element);
const { left: retLeft, top: rectTop, width: rectWidth, height: rectHeight } = box as DOMRect;
const scrollLeft = (pageXOffset || docScrollLeft) - (docClientLeft || 0);
const scrollTop = (pageYOffset || docScrollTop) - (docClientTop || 0);
const offsetLeft = retLeft + pageXOffset;
const offsetTop = rectTop + pageYOffset;
const left = offsetLeft - scrollLeft;
const top = offsetTop - scrollTop;
const clientWidth = window.document.documentElement.clientWidth;
const clientHeight = window.document.documentElement.clientHeight;
return {
left: left,
top: top,
right: clientWidth - rectWidth - left,
bottom: clientHeight - rectHeight - top,
rightIncludeBody: clientWidth - left,
bottomIncludeBody: clientHeight - top,
};
}
export function hackCss(attr: string, value: string) {
const prefix: string[] = ['webkit', 'Moz', 'ms', 'OT'];
const styleObj: any = {};
prefix.forEach((item) => {
styleObj[`${item}${upperFirst(attr)}`] = value;
});
return {
...styleObj,
[attr]: value,
};
}
/* istanbul ignore next */
vben
authored
5 years ago
135
export function on(
vben
authored
5 years ago
136
element: Element | HTMLElement | Document | Window,
137
138
139
140
141
142
event: string,
handler: EventListenerOrEventListenerObject
): void {
if (element && event && handler) {
element.addEventListener(event, handler, false);
}
vben
authored
5 years ago
143
}
144
145
/* istanbul ignore next */
vben
authored
5 years ago
146
export function off(
vben
authored
5 years ago
147
element: Element | HTMLElement | Document | Window,
148
149
150
151
152
153
event: string,
handler: Fn
): void {
if (element && event && handler) {
element.removeEventListener(event, handler, false);
}
vben
authored
5 years ago
154
}
vben
authored
5 years ago
155
156
/* istanbul ignore next */
vben
authored
5 years ago
157
export function once(el: HTMLElement, event: string, fn: EventListener): void {
vben
authored
5 years ago
158
159
160
161
162
163
164
const listener = function (this: any, ...args: unknown[]) {
if (fn) {
fn.apply(this, args);
}
off(el, event, listener);
};
on(el, event, listener);
vben
authored
5 years ago
165
}