Question

默认情况下我有5个文本框。当用户单击按钮时，应添加一个文本框。

我怎么能这样做？

Answer 1

如果替换innerHTML，将清除先前输入的值，为避免这种情况，您可以以编程方式附加输入元素：

var input = document.createElement('input'); 
input.type = "text"; 
//...    
container.appendChild(input);

检查this示例。

Answer 2

Javascript功能

function add() {

//Create an input type dynamically.
var element = document.createElement("input");

//Create Labels
var label = document.createElement("Label");
label.innerHTML = "New Label";     

//Assign different attributes to the element.
element.setAttribute("type", "text");
element.setAttribute("value", "");
element.setAttribute("name", "Test Name");
element.setAttribute("style", "width:200px");

label.setAttribute("style", "font-weight:normal");

// 'foobar' is the div id, where new fields are to be added
var foo = document.getElementById("fooBar");

//Append the element in page (in span).
foo.appendChild(label);
foo.appendChild(element);
}

Html部分，

<button id="button" value="Add" onClick:"javascript:add();">

而且，它完成了！

Answer 3

<script>
function add()
{
    document.getElementById("place").innerHTML="<input type='text' value=''>"
}
</script>
<input type="button" value="clickMe" onClick="add();">
<div id="place"></div>

Answer 4

<script>
function add()
{
    var inpt = document.getElementById('input_template');
    inpt.parentNode.appendChild(inpt.cloneNode(false));
}
</script>

<input type="button" onclick="add();">

将id = input_template设置为其中一个预定义的文本框

Answer 5

最好将事件附加到按钮的onclick，这会将div的可见性设置为inline。考虑到灵活性和稳健性，这是我能看到的最佳方式。

有一个look here例如代码。

Answer 6

通过更改循环值，我们可以动态生成文本框

function addFunction() {
  var table = document.getElementById("textbox");
  var rowlen = table.rows.length;
  var row = table.insertRow(rowlen);
  row.id = rowlen;
  var arr = ['textboxfiledname'];
  for (i = 0; i < 2; i++) {
    var x = row.insertCell(i)
    if (i == 1) {
      x.innerHTML = "<input type='button' onclick='removeCell(" + row.id + ")' value=Delete>"
    } else {
      x.innerHTML = "<label>" + arr[i] + ":</label><input type='textbox' name='" + arr[i] + "'>"
    }
  }
}

function removeCell(rowid) {
  var table = document.getElementById(rowid).remove();
}

input[type=text] {
  width: 100%;
  height: 50%;
  padding: 15px;
  border: 1px solid #ccc;
  border-radius: 4px;
  resize: vertical;
}

label {
  padding: 12px 12px 12px 0;
  display: inline-block;
  font-family: sans-serif;
}

input[type=button] {
  background-color: #4CAF50;
  border: none;
  color: white;
  padding: 6px 20px;
  text-decoration: none;
  margin: 4px 2px;
  cursor: pointer;
}

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>

<fieldset style="margin-left:20%;margin-right:20%;font-family:sans-serif;padding:15px;border-radius:5px;background:#f2f2f2;border:5px solid #1F497D">
  <legend style="background:#1F497D;color:#fff;padding:5px 10px;font-size:22px;border-radius:5px;margin-left:20px;box-shadow:0 0 0 5px #ddd">DynamicTextbox</legend>
  <table id="textbox">
    <tr>
      <td>
        <input type="button" onclick="addFunction()" value="AddTextbox" />
      </td>
    </tr>
  </table>
</fieldset>

Answer 7

试试这个

<html>
<head>
<title>Dynamic Form</title>
<script language="javascript" type="text/javascript" >
function changeIt()
{

createTextbox.innerHTML = createTextbox.innerHTML +"<br><input type='text' name='mytext' >"

}
</script>
</head>
<body>

<form name="form">
<input type="button" value="clickHere" onClick="changeIt()">
<div id="createTextbox"></div>
</form> 
</body>
</html>

Answer 8

<!DOCTYPE html>
<html>
<body>
 <h1>My First Web Page</h1>
 <p>My first paragraph.</p>
 <button type="button" onclick="myFunction()">Click me!</button>
 <script>
 var count =0;
 function myFunction() {
 count++
  document.write('Lable1');
  document.write('<input type="text" name="one+count">');
  document.write('Lable2');
  document.write('<input type="text" name="two+count">');

  document.write('Lable3'); 
  document.write('<input type="text" name="three+count">');

  document.write('Lable4');
  document.write('<input type="text" name="four+count">');

  document.write(count);

  }
  </script>

  </body>
  </html>

如何在Javascript中动态添加文本框？

8 个答案: