在表单中单击按钮时创建文本输入
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【中文标题】在表单中单击按钮时创建文本输入【英文标题】：Create text-input on button click in form 【发布时间】：2021-12-08 15:32:17 【问题描述】：我想创建另一个输入字段，每次单击表单内的按钮“+”。我搜索了一个解决方案，但我找不到任何东西。输入字段应在“+”按钮上方的表单内创建。
这是我当前的代码：
<div class="row">
<div class="col-md-12">
<form method="post" id="create-form" action="create.php" enctype="multipart/form-data">
<?php
/* getting sample questions */
/* checks result and creates variables from result */
if ($sampleamount > 0) // amount
$samplequery->bind_result($questionid_sample, $question_sample);
while ($samplequery->fetch()) // while page can use this variables
/* echo text-box, value from db */
$required = $questionid_sample === 1 ? "required" : ""; // one question is always required
echo "<input class='question-box' type='text' name='" . $questionid_sample . "' placeholder='Write your question in here.' maxlength='255' size='70' value='" . $question_sample . "'" . $required . "> <br>";
else
/* no result (db=sample_question) */
header('Location: ../index.php');
$samplequery->close();
closeDB($conn);
/* adds more input for user */
for ($i = ($sampleamount + 1); $i <= ($additionalquestions + $sampleamount); $i++)
echo "<input class='question-box' type='text' name='" . $i . "' placeholder='Write your question in here.' maxlength='255' size='70'> <br>";
?>
<br>
<input class="createsurvey2" type="button" id="addqbtn" name="addqbtn" value="+" >
<br>
<input class="createsurvey2" type="submit" name="btnSubmit" value="Create Survey!" >
</form>
</div>
</div>
</div>
<script>
function addquestion()
var counter = 2;
var addqbtn = document.getElementById('addqbtn');
var form = document.getElementById('create-form');
var addInput = function()
counter++;
var input = document.createElement("input");
input.id = 'additionalquestion-' + counter;
input.type = 'text';
input.class = 'question-box';
input.name = 'name';
input.placeholder = 'Write your question in here.';
form.appendChild(input);
;
addqbtn.addEventListener('click', function()
addInput();
.bind(this));
;
</script>
【问题讨论】：
***.com/questions/39103510/… 【参考方案1】：<html>
<body>
<button onclick="createNewFiled()" id="incrementBtn" type="button">Click here</button>
<form id="form" action="">
</form>
</body>
</html>
<script type="text/javascript">
var counter = 0;
var incrementBtn = document.getElementById('incrementBtn');
var form = document.getElementById('form');
var createNewFiled = function()
counter++;
var input = document.createElement("input");
var br = document.createElement("br"); // If you need new line after each input field
input.id = 'input-' + counter;
input.classList.add("inputClass");
input.type = 'text';
input.name = 'name'+counter;
input.placeholder = 'Input field ' + counter;
form.appendChild(input);
form.appendChild(br); // If you need new line after each input field
;
</script>
【讨论】：
它现在终于创建了一个输入字段。但是我需要为新创建的输入提供一个类名，使其看起来像上面的输入字段，并且它还在“+”按钮下方创建输入字段，但它应该在上面添加它们。有可能吗？ 类名现在可以工作了，但它仍然在按钮下方添加了输入，有谁知道如何修复它？ 根据您的需要编辑答案。请将答案标记为已接受。以上是关于在表单中单击按钮时创建文本输入的主要内容，如果未能解决你的问题，请参考以下文章