使用jQuery将文本附加到textarea的末尾

Question

我正在尝试使用jquery在textarea的末尾附加文本.

我的HTML代码如下所示:

<textarea class='form-control' placeholder="Write something..." id="message" name="message" size='20'></textarea>
<fieldset class="form-group">
  <div class="checkbox">
    <label for="deptList">
      <label for="departments" id="deptList">Select a department
        <small>use this in case you've set up your account to <a
                                                href="#"> include a department</a> at the end
                                            of the text
                                        </small>
      </label>
      <input type="checkbox" value="" class="checkbox-inline" id="deptCheck">
      <select class="form-control" id="departments">
        <option>Dept. 1</option>
        <option>Dept. 2</option>
        <option>Dept. 3</option>
        <option>Dept. 4</option>
        <option>Dept. 5</option>
        <option>Dept. 6</option>
        <option>Dept. 7</option>
      </select>
    </label>
  </div>

</fieldset>

和我附加文本的脚本是:

$('#deptCheck').click(function() {
    var theMessage = $("#message").text();
    var theDepartment = $("#departments").find(":selected").text();

    if ($(this).is(":checked")) {

        console.log(theMessage + theDepartment);
        $("#message").val(theMessage + theDepartment);
    }else {
        alert('you have included department in your text, please remove it to avoid extra charges');
    }
});

到目前为止: - 我可以添加下拉选项的值到文本区域但是当我添加它时,它会清除所有现有文本.

我想要实现的是用户在文本区域中键入一些文本,然后用户从文本区域下方的下拉列表中选择一个选项,然后在文本中键入文本的末尾添加下拉列表的文本区域.我尝试过在线资料,但我似乎没有把它弄好.我哪里错了？

这是一个链接到相同的JS小提琴的小提琴

Answer 1

要获得text内部,textarea你必须使用该val()功能: $("#message").val();

$('#deptCheck').click(function() {

  var theMessage = $("#message").val();
  var theDepartment = $("#departments").find(":selected").text();

  if ($(this).is(":checked")) {

    console.log(theMessage + theDepartment);
    $("#message").val(theMessage + theDepartment);
  } else {
    alert('you have included department in your text, please remove it to avoid extra charges') //disable input
  }
});

演示:https://jsfiddle.net/h2dp1oqu/8/