我創建了以下 html 表單。
@import url('https://fonts.googleapis.com/css?family=Roboto');
*{
margin: 0;
padding: 0;
box-sizing: border-box;
outline: none;
font-family: 'Roboto', sans-serif;
}
body{
background: url('bg.jpg') no-repeat top center;
background-size: cover;
height: 100vh;
}
.wrapper{
position: absolute;
top: 50%;
left: 50%;
transform: translate(-50%, -50%);
width: 100%;
max-width: 550px;
/* #background: rgba(0,0,0,0.8);*/
background:rgb(233, 227, 227);
padding: 30px;
border-radius: 5px;
box-shadow: 0 0 10px rgba(0,0,0,0.3);
}
.wrapper .title h1{
color: #c5ecfd;
text-align: center;
margin-bottom: 25px;
}
.contact-form{
display: flex;
}
.input-fields{
display: flex;
flex-direction: column;
margin-right: 4%;
}
.input-fields,
.msg{
width: 48%;
}
.input-fields .input,
.msg textarea{
margin: 10px 0;
border: 0px;
/*#border: 2px solid #c5ecfd;*/
border: 1px solid gray;
padding: 10px;
color: black;
width: 100%;
}
.msg textarea{
height: 212px;
}
::-webkit-input-placeholder {
/* Chrome/Opera/Safari */
color: #c5ecfd;
}
::-moz-placeholder {
/* Firefox 19 */
color: #c5ecfd;
}
:-ms-input-placeholder {
/* IE 10 */
color: #c5ecfd;
}
.btn {
background: #39b7dd;
text-align: center;
padding: 15px;
border-radius: 5px;
color: #fff;
cursor: pointer;
text-transform: uppercase;
width: 100%;
}
input[type=submit] {padding:15px; background:#ccc; border:0 none;
display: block;
cursor:pointer;
background: #39b7dd;
text-align: center;
border-radius: 5px;
color: #fff;
text-transform: uppercase; }
input[type=file] {
padding-top:15px;
padding-bottom:15px;
/*#display: block;*/
color: black;
width: 100%;
}
input[type=radio] {
padding-top:15px;
padding-bottom:15px;
/*#display: block;*/
float:left;
position:inline;
color: black;
padding-right:15px;
}
.radioOpContainer
{
/*position:inline;*/
padding-top:15px;
padding-bottom:15px;
}
.radioOpContainer input{
/*#padding-right:15px;*/
margin-right:20px;
}
@media screen and (max-width: 600px){
.contact-form{
flex-direction: column;
}
.msg textarea{
height: 80px;
}
.input-fields,
.msg{
width: 100%;
}
}
/*
#fileuploaddiv
{
padding-top:5px;
}
*/
.label
{
padding-top:20px;
font-size: 15px;
}
.error
{
/*font-family: 'Open Sans Regular';*/
font-family: "Helvetica Neue",Roboto,Arial,sans-serif;
/*font-size: 1em;*/
font-size: 14px;
line-height: 1em;
color: #c0392b;
}
/* ---------------------- */
.table_row
{
padding-top:10px;
}
.cell_wrapper
{
background-color: white;
}
.cell
{
display:inline-block;
/*float: left;
width: 50%; */
/*outline: 1px dashed black; */
/*margin-bottom: 20px;*/
word-break:break-all;
font-family: Monospace;
width: 49%;
}
.resultcell
{
display:inline-block;
/*float: left;
width: 50%; */
/*outline: 1px dashed black; */
/*margin-bottom: 20px;*/
word-break:break-all;
font-family: Monospace;
width: 49%;
}
@media only screen and (max-width: 600px) {
.cell, .resultcell
{
background-color: lightblue;
width: 100%;
}
}
.red{
color: red;
}
.magenta{
color: magenta;
}
<!DOCTYPE html>
<html lang="en" xmlns:th="http://www.thymeleaf.org">
<head>
<meta charset="UTF-8">
<title>Responsive Contact us form Using HTML and CSS</title>
<link rel="stylesheet" href="styles.css">
</head>
<body>
<div class="wrapper">
<div class="title">
<h1>contact us form</h1>
</div>
<form th:action="@{/}" th:object="${messageForm}" method="post" enctype="multipart/form-data" id="MqMessageSenderForm">
<div class="contact-form">
<div class="input-fields">
<div class="label"><p>Queue manager Name: </p></div>
<select id="recievedQMname" class="input" th:field="*{recievedQMname}"><option selected="selected" value=""/></select>
<div class="error" th:if="${#fields.hasErrors('recievedQMname')}" th:errors="*{recievedQMname}"></div>
<div class="label"><p>Destination queue Name</p></div>
<input type="text" class="input" th:field="*{recievedQname}" id="recievedQname">
<div class="error" th:if="${#fields.hasErrors('recievedQname')}" th:errors="*{recievedQname}"></div>
<div class="label"><p> Select an input method </p></div>
<div class="radioOpContainer"><input type="radio" name="msginputoption" id="fileradio" checked="checked" > <label for="fileradio">File</label></div>
<div class="radioOpContainer"><input type="radio" name="msginputoption" id="messagetextradio" > <label for="messagetextradio">Message text</label></div>
</div>
<div class="msg">
<div class="label">Upload files </div>
<input type="file" th:field="*{files}" multiple accept=".txt,.xml" id="files" >
<div class="error" th:if="${fileUploadValidationResult != null}" th:text="'' ${fileUploadValidationResult} ''"></div>
<textarea class="input" th:field="*{msgText}" id="msgText" disabled="disabled" ></textarea>
<div class="error" th:if="${textMsgValidationResult != null}" th:text="'' ${textMsgValidationResult} ''"></div>
<input class="btn" type="submit">
</div>
</div>
</form>
<div class="table" th:if="${result != null}">
<div class="table_row" th:each="mapEntry : ${result}">
<div class="cell_wrapper">
<div class="cell" th:text="${mapEntry.key}" >key</div> <div class="resultcell" th:text="${mapEntry.value}">value</div>
</div>
</div>
</div>
<div class="table" th:if="${UImessageSentresult != null}">
<div class="table_row">
<div class="cell_wrapper">
<div class="resultcell" style="width: 100%;" th:text="${UImessageSentresult}" >UImessageSentresult</div>
</div>
</div>
</div>
</div>
</body>
</html>當發送狀態結果的訊息被添加到頁面底部時，頂部的部分正在從瀏覽器中消失（甚至無法滾動到頂部 - 我也附上了影像）我已將代碼添加到 jsfiddle 
<!DOCTYPE html>
<html lang="en" xmlns:th="http://www.thymeleaf.org">
<head>
<meta charset="UTF-8">
<title>Responsive Contact us form Using HTML and CSS</title>
<link rel="stylesheet" href="styles.css">
</head>
<body>
<div class="wrapper">
<div class="title">
<h1>contact us form</h1>
</div>
<form th:action="@{/}" th:object="${messageForm}" method="post" enctype="multipart/form-data" id="MqMessageSenderForm">
<div class="contact-form">
<div class="input-fields">
<div class="label"><p>Queue manager Name: </p></div>
<select id="recievedQMname" class="input" th:field="*{recievedQMname}"><option selected="selected" value=""/></select>
<div class="error" th:if="${#fields.hasErrors('recievedQMname')}" th:errors="*{recievedQMname}"></div>
<div class="label"><p>Destination queue Name</p></div>
<input type="text" class="input" th:field="*{recievedQname}" id="recievedQname">
<div class="error" th:if="${#fields.hasErrors('recievedQname')}" th:errors="*{recievedQname}"></div>
<div class="label"><p> Select an input method </p></div>
<div class="radioOpContainer"><input type="radio" name="msginputoption" id="fileradio" checked="checked" > <label for="fileradio">File</label></div>
<div class="radioOpContainer"><input type="radio" name="msginputoption" id="messagetextradio" > <label for="messagetextradio">Message text</label></div>
</div>
<div class="msg">
<div class="label">Upload files </div>
<input type="file" th:field="*{files}" multiple accept=".txt,.xml" id="files" >
<div class="error" th:if="${fileUploadValidationResult != null}" th:text="'' ${fileUploadValidationResult} ''"></div>
<textarea class="input" th:field="*{msgText}" id="msgText" disabled="disabled" ></textarea>
<div class="error" th:if="${textMsgValidationResult != null}" th:text="'' ${textMsgValidationResult} ''"></div>
<input class="btn" type="submit">
</div>
</div>
</form>
<div class="table" th:if="${result != null}">
<div class="table_row" th:each="mapEntry : ${result}">
<div class="cell_wrapper">
<div class="cell" th:text="${mapEntry.key}" >key</div> <div class="resultcell" th:text="${mapEntry.value}">value</div>
</div>
</div>
</div>
<div class="table" th:if="${UImessageSentresult != null}">
<div class="table_row">
<div class="cell_wrapper">
<div class="resultcell" style="width: 100%;" th:text="${UImessageSentresult}" >UImessageSentresult</div>
</div>
</div>
</div>
</div>
</body>
</html>
uj5u.com熱心網友回復：
包裝器 div 以絕對值形式給出。當與父元素高度相比時，這就是隱藏內容的原因，您可以將 .wrapper 更改為相對而不是絕對，或者您可以為包裝添加滾動。
試試下面的代碼
.wrapper {
position: relative;
top: auto;
left: auto;
transform: initial;
}
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