-
Notifications
You must be signed in to change notification settings - Fork 1
/
index.html
66 lines (58 loc) · 1.92 KB
/
index.html
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
<!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">
<link rel="stylesheet" href="./css/style.css">
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.4.1/jquery.min.js"></script>
<title>Document</title>
</head>
<body>
<form action="index.html" class="login-form">
<h1>Login</h1>
<div class="txtb">
<input type="text" id="focus">
<span data-placeholder="Username"></span>
</div>
<div class="txtb">
<input type="password" id="focus2">
<span data-placeholder="Password"></span>
</div>
<input type="submit" class="loginbtn" value="Login">
<div class="buttom-text">
Don't hava account? <a href="#">Sign up</a>
</div>
</form>
<script>
// 用JS原生实现
// var fct = document.getElementById("focus");
// var fct2 = document.getElementById("focus2")
// fct.addEventListener("focus",function(){
// fct.classList.add("focus");
// })
// fct2.addEventListener("focus",function(){
// fct2.classList.add("focus");
// })
// fct.addEventListener("blur",function(){
// if(fct.value == ""){
// fct.classList.remove("focus");
// }
// })
// fct2.addEventListener("blur",function(){
// if(fct2.value == ""){
// fct2.classList.remove("focus");
// }
// })
//用Jquery实现
$(".txtb input").on("focus",function(){
$(this).addClass("focus");
})
$(".txtb input").on("blur",function(){
if($(this).val()==""){
$(this).removeClass("focus");
}
})
</script>
</body>
</html>