当用户选中多个复选框时，表单字段应根据复选框出现，例如：如果航班复选框具有全名，则当用户同时选中酒店和航班时，应在其中填写全名和姓氏，其他字段应在其中隐藏。
我尝试了一个切换方法，该方法在我检查时会隐藏，但是我无法选择多个字段并将公共字段放在一起并隐藏其他字段。我的复选框也应该水平对齐。我应该使用CSS，但无法正常工作
function toggle(object) {
var input;
var value = object.getAttribute("value");
switch (value) {
case "flight":
input = "input1";
break;
case "hotel":
input = "input2";
break;
case "travel":
input = "input3";
break;
}
var elements = document.getElementsByClassName(input);
for (var i = 0; i < elements.length; i++) {
if (elements[i].style.display == "block") {
elements[i].style.display = "none";
} else {
elements[i].style.display = "block";
}
}
document.getElementsByTagName("button")[0].style.display = "block";
}.form-style-1 {
max-width: 600px;
padding: 15px 25px;
background: #f4f7f8;
margin: 15px auto;
padding: 20px;
background: #f4f7f8;
border-radius: 18px;
font-family: Calibri, sans-serif;
}
.form-style-1 fieldset {
border-radius: none;
background-color: #f2f2f2;
padding: 20px;
border: 1px solid lightgray;
width: 550px;
margin: auto;
}
.form-style-1 lable {
width: 180px;
float: left;
padding-top: 50px;
}
.form-control {
width: 550px;
padding: 15px 30px;
margin: 8px 0;
border: 1px solid #ccc;
border-radius: 4px;
box-sizing: border-box;
display: inline;
}
output {
height: 30px;
display: block;
padding-top: 20px;
}
.btn {
width: 100%;
background-color: #4CAF50;
padding: 14px 20px;
margin: 8px 0;
border: none;
border-radius: 4px;
cursor: pointer;
}
.btn:hover {
background-color: #45a049;
}
.form-style-1 input[type="text"],
.form-style-1 input[type="date"],
.form-style-1 input[type="datetime"],
.form-style-1 input[type="email"],
.form-style-1 input[type="number"],
.form-style-1 input[type="search"],
.form-style-1 input[type="time"],
.form-style-1 input[type="url"],
.form-style-1 input[type="tel"],
.form-style-1 textarea,
.form-style-1 select {
font-family: Calibri, sans-serif;
background: rgba(255, 0, 0, 0.2);
border: none;
border-radius: 3px;
font-size: 15px;
margin: 0;
outline: 0;
padding: 10px;
width: 50%;
box-sizing: border-box;
-webkit-box-sizing: border-box;
-moz-box-sizing: border-box;
background-color: #e8eeef;
color: #000000;
-webkit-box-shadow: 0 1px 0 rgba(0, 0, 0, 0.03) inset;
box-shadow: 0 1px 0 rgba(0, 0, 0, 0.03) inset;
margin-bottom: 10px;
}
.form-style-1 input[type="text"]:focus,
.form-style-1 input[type="date"]:focus,
.form-style-1 input[type="datetime"]:focus,
.form-style-1 input[type="email"]:focus,
.form-style-1 input[type="number"]:focus,
.form-style-1 input[type="search"]:focus,
.form-style-1 input[type="time"]:focus,
.form-style-1 input[type="url"]:focus,
.form-style-1 input[type="tel"],
.form-style-1 textarea:focus,
.form-style-1 input {}
}
.form-style-1 select {
-webkit-appearance: menulist-button;
height: 15px;
color: #000000;
text-shadow: 0 1px 0 rgba(0, 0, 0);
background: #d2d9dd;
}
.form-style-1 number {
background: #1abc9c;
color: #000000;
height: 10px;
width: 10px;
display: inline-block;
font-size: 0.8em;
margin-right: 4px;
line-height: 10px;
text-align: center;
text-shadow: 0 1px 0 rgba(255, 255, 255, 0.2);
border-radius: 15px 15px 15px 0px;
}
.form-style-1 input[type="submit"],
.form-style-1 input[type="button"] {
position: relative;
display: block;
padding: 15px 29px 15px 29px;
color: #FFF;
margin: 0 auto;
background: #1abc9c;
font-size: 15px;
text-align: center;
line-height: 10%;
font-style: normal;
width: 30%;
border: 1px solid #16a085;
border-width: 1px 1px 3px;
margin-top: 1px;
margin-bottom: 5px;
}
.form-style-1 input[type="submit"]:hover,
.form-style-1 input[type="button"]:hover {
background: #109177;
}
#travel-form label,
textarea {
display: flex;
flex-flow: row nowrap;
justify-content: space-between;
width: 80%;
padding-bottom: 0.1rem;
}
#travel-form input,
select {
margin-left: 1rem;
}
textarea {
display: flex;
flex-flow: row nowrap;
justify-content: space-between;
width: 250%;
padding-bottom: 0.1rem;
}
.common {
margin-bottom: 8px;
}
input[type="text"] {
display: none;
}
button {
display: none;
}
input[type="checkbox"] {
display: inline;
width: 12px;
height: 12px;
padding: 5px;
}<body>
<div class="form-style-1">
<form action="mailto: ?subject=Travel Pre-approval Form " method="post" enctype="text/plain" id="travel-form" onsubmit="test1()">
<fieldset>
<input type="checkbox" onclick="toggle(this)" id="flight" value="flight"><label for="flight">Flight</label>
<input type="checkbox" onclick="toggle(this)" id="hotel" value="hotel"><label for="hotel">Hotel</label>
<input type="checkbox" onclick="toggle(this)" id="travel" value="travel"><label for="travel">Travel</label>
<label>Full Name: <input type="text" class="input1 common " id="name" placeholder="Full Name as per Passport"></label><br>
<label>Date of travel: <input type="date" class="input1 common " name="num1" id="date of travel"></label>
<label>Date of arrival: <input type="date" class="input1 common" name="num2"></label>
<label>Origin Location: <select name="opt2" id="cost" onchange="calculateTotal()">
<option value="select">select</option>
<option value="Dubai, United Arab Emirates (DXB-Dubai Intl.)">Dubai, United Arab Emirates (DXB-Dubai Intl.)</option>
</select></label>
<label>Destination Location: <select name="op1" id="locations" onchange="calculateTotal()">
<option value="none">none</option>
<option value="Aberdeen, Scotland, UK (ABZ)">Aberdeen, Scotland, UK (ABZ)</option>
</select></label>
<label>Mobile Number(Roaming) <input type="tel" id="phone"></label><br>
<br>
<label>Company Email Address <input type="email" id="email" placeholder="email address"></label><br>
<br>
<label>Passport Number <input type="text" id="passnum" size="5" name="passportnumber"></label>
<br>
<br>
<label>Passport Expiry Date <input type="date" id="passexdate" size="4" name="passportexdate"></label> <br>
<br>
<label>Visa Required <select type="checkbox" name="visarequired">
<option value="Yes">Yes</option>
<option value="No">No</option>
<option value="Don't Know">Don't Know</option>
</select></label>
<br>
<br>
<label>Visa Expiry Date <input type="date" id="visaexdate" name="visa"> </label>
<br>
<br>
<label>Purpose of Travel <input type="text" rows="6" cols="50" name="purpose Of Travel" form="usrform" placeholder="Purpose Of Travel">
</label> <br>
<label>Address Of Place Of Visitrows <input type="text" rows="6" cols="50" name="address" form="usrform" placeholder="Address of the place of Vist">
</label> <br>
<br>
<label>Billable Cost Centre <input type="text" id="billablecostcentre"></label>
<br>
<br>
<label>Billable project code <br> (Select "N/A" otherwise) <input type="text"></label>
<br>
<br>
<textarea rows="4" cols="150" name="comment" form="usrform" placeholder="Comments">
</textarea>
<label>Do you need Ground Transfer <select type="checkbox" namegroundtransfer>
<option>Yes</option>
<option>No</option>
</select></label>
<br>
<div id="totalCost">Total Cost </div><br>
<br>
<br>
<input type="submit" value="Submit">
</fieldset>
</form>
</div>
答案 0 :(得分：0)
请查看以下代码，这是对表单的简化和通用化仅CSS 的方法，它允许您使用复选框有条件地切换表单字段：
.form__field {
display: block;
}
[class*="--checkbox"] {
display: inline-block;
}
[data-conditional] {
display: none;
}
#flight:checked ~ [data-conditional*="flight"] {
display: block;
}
#hotel:checked ~ [data-conditional*="hotel"] {
display: block;
}
#travel:checked ~ [data-conditional*="travel"] {
display: block;
}<form action="mailto:?subject=Travel Pre-approval Form " method="POST" enctype="text/plain" id="travel-form" onsubmit="test1()">
<input class="form__input form__input--checkbox" type="checkbox" id="flight" />
<label class="form__field form__field--checkbox" for="flight">
<span class="form__label">Flight</span>
</label>
<input class="form__input form__input--checkbox" type="checkbox" id="hotel" />
<label class="form__field form__field--checkbox" for="hotel">
<span class="form__label">Hotel</span>
</label>
<input class="form__input form__input--checkbox" type="checkbox" id="travel" />
<label class="form__field form__field--checkbox" for="travel">
<span class="form__label">Travel</span>
</label>
<label class="form__field form__field--text" data-conditional="flight hotel">
<span class="form__label">Full Name:</span>
<input class="form__input" type="text" placeholder="Full Name as per Passport" />
</label>
<label class="form__field form__field--date" data-conditional="flight hotel">
<span class="form__label">Date of travel:</span>
<input class="form__input" type="date" />
</label>
<label class="form__field form__field--date" data-conditional="flight hotel">
<span class="form__label">Date of arrival:</span>
<input class="form__input" type="date" />
</label>
<label class="form__field form__field--text" data-conditional="flight">
<span class="form__label">For Flight only:</span>
<input class="form__input form__input--text" type="text" />
</label>
<label class="form__field form__field--text" data-conditional="hotel">
<span class="form__label">For Hotel only:</span>
<input class="form__input form__input--text" type="text" />
</label>
<label class="form__field form__field--text" data-conditional="travel">
<span class="form__label">For Travel only:</span>
<input class="form__input form__input--text" type="text" />
</label>
<div class="form__field form__field--submit">
<button type="submit">Submit</button>
</div>
</form>
我的复选框也应该水平对齐
上面的代码片段也应该满足
我们基本上使用复选框来基于data-conditional属性（您可以随意调用）切换表单字段，该属性包含一些我们控制用来显示/隐藏表单字段的值。这里相对简单的秘密调味部分是general next sibling selector和HTML标记的组合，使我们可以正确使用它。
我添加了更多字段，这些字段仅在表单末尾显示为单个复选框，以说明条件过滤器的工作原理。