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
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
| <!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>自定义菜单栏</title>
<style>
#menu {
height: 180px;
overflow-x: hidden;
border: 1px solid #cacaca;
box-shadow: 2px 2px 5px #d4d4d4;
position: absolute;
display: none;
}
#menu ul {
padding: 0;
list-style: none;
}
#menu ul li {
width: 130px;
height: 25px;
line-height: 25px;
padding: 0 10px;
}
</style>
</head>
<body>
<div id="menu">
<ul>
<a href="#">
<li>菜单1</li>
</a>
<a href="#">
<li>菜单2</li>
</a>
<a href="#">
<li>菜单3</li>
</a>
<a href="#">
<li>菜单4</li>
</a>
<a href="#">
<li>菜单5</li>
</a>
<a href="#">
<li>菜单6</li>
</a>
<a href="#">
<li>菜单6</li>
</a>
<a href="#">
<li>菜单6</li>
</a>
<a href="#">
<li>菜单6</li>
</a>
<a href="#">
<li>菜单6</li>
</a>
</ul>
</div>
<script>
const menu = document.querySelector("#menu");
window.oncontextmenu = function (e) {
e.preventDefault();
const menuHeight = menu.offsetHeight;
const menuWidth = menu.offsetWidth;
if (menuWidth + e.clientX > window.innerWidth) {
menu.style.left = e.clientX - menuWidth + 5 + 'px';
} else {
menu.style.left = e.clientX + 'px';
}
if (menuHeight + e.clientY > window.innerHeight) {
menu.style.top = e.clientY - menuHeight + 5 + 'px';
} else {
menu.style.top = e.clientY + 'px';
}
menu.style.width = '125px';
menu.style.display = 'block';
}
window.onclick = function () {
menu.style.display = 'none';
}
</script>
</body>
</html>
|
