Question

我正在尝试通过jQuery验证HTML表单。但是，第二个条件（即文本字段的值必须是一定数量）似乎不起作用。如果有人能说明原因，那就太好了。谢谢。

我已将代码附加到此问题。

$("#sample1").keyup(function (e) {
	var s_id = $('#sample1').val();

    if (e.keyCode == 13 || s_id=="220764690") {
        alert('Captured Enter !')
        // Do whatever you need
    }
});

h1{
	text-align:center;
	font-family: 'Montserrat', sans-serif !important;

}

.sample1{
	text-align: center;
}

.insert {
  display: inline-block;
}

.log{
	background-color:lightblue;
	display: inline-block;
	padding:90px;
  vertical-align: middle;

}

.logo{
  display: block;
    margin: 0 auto;
}

<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.2/jquery.min.js"></script>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.3/jquery.min.js"></script><link href="https://fonts.googleapis.com/css?family=Montserrat" rel="stylesheet">
<link rel="stylesheet" href="https://storage.googleapis.com/code.getmdl.io/1.0.0/material.amber-pink.min.css" />
<script src="https://storage.googleapis.com/code.getmdl.io/1.0.0/material.min.js"></script>
<link rel="stylesheet" href="https://fonts.googleapis.com/icon?family=Material+Icons">

<center><div class = "log">
<h1>Hey Technite!</h1>
<center>
<form action="#">
  <div class="insert mdl-textfield mdl-js-textfield textfield-demo">
  
		<input class="mdl-textfield__input" type="text" id="sample1" />
    <label class="mdl-textfield__label" for="sample1" id= "atext">Student ID</label>
  </div>
	</form>
	</center>
	</div>
	</center>
<br><br><br><br><br>
<img src = "https://qph.fs.quoracdn.net/main-qimg-00f778bc5f5fcb5d79a0372986ab1e66.webp" class = "logo">

Answer 1

尝试使用&&运算符代替||。如果确实如此，你可以得到两种条件。

$("#sample1").keyup(function (e) {
    var s_id = $('#sample1').val();

    if (e.keyCode == 13 && s_id=="220764690") {
        alert('Captured Enter !')
        // Do whatever you need
    }
});

Answer 2

您的if条件没有错误，而不是||您需要使用&&才能检查用户是否输入了enter密钥和220764690 input 1}}。

$("#sample1").keyup(function (e) {
	var s_id = $('#sample1').val();

    if (e.keyCode == 13 && s_id=="220764690") {
        alert('Captured Enter !')
        // Do whatever you need
    }
});

h1{
	text-align:center;
	font-family: 'Montserrat', sans-serif !important;

}

.sample1{
	text-align: center;
}

.insert {
  display: inline-block;
}

.log{
	background-color:lightblue;
	display: inline-block;
	padding:90px;
  vertical-align: middle;

}

.logo{
  display: block;
    margin: 0 auto;
}

<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.2/jquery.min.js"></script>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.3/jquery.min.js"></script><link href="https://fonts.googleapis.com/css?family=Montserrat" rel="stylesheet">
<link rel="stylesheet" href="https://storage.googleapis.com/code.getmdl.io/1.0.0/material.amber-pink.min.css" />
<script src="https://storage.googleapis.com/code.getmdl.io/1.0.0/material.min.js"></script>
<link rel="stylesheet" href="https://fonts.googleapis.com/icon?family=Material+Icons">

<center><div class = "log">
<h1>Hey Technite!</h1>
<center>
<form action="#">
  <div class="insert mdl-textfield mdl-js-textfield textfield-demo">
  
		<input class="mdl-textfield__input" type="text" id="sample1" />
    <label class="mdl-textfield__label" for="sample1" id= "atext">Student ID</label>
  </div>
	</form>
	</center>
	</div>
	</center>
<br><br><br><br><br>
<img src = "https://qph.fs.quoracdn.net/main-qimg-00f778bc5f5fcb5d79a0372986ab1e66.webp" class = "logo">

Answer 3

如果您希望在拥有该ID时显示警报，请按Enter键，您需要使用＆amp;＆amp;运算符，而不是||

如果多条件声明有误

3 个答案: