javascript - JS向表单添加输入刷新页面不输入

标签 javascript html

我对这个主题做了一些研究，但一无所获。如果这是重复的，我深表歉意。

我有一个表单，要求用户提供过去 14 天内访问过的四个地点。然而，显然他们可以访问 4 个以上的地方，我想创建一个脚本来添加新的输入集。这是我的完整代码:

<!doctype html>
<html>
    <head>
        <title>Title</title>
        <meta charset="utf-8">
        <meta name="viewport" content="width=device-width">
        <link href="https://stackpath.bootstrapcdn.com/bootstrap/4.4.1/css/bootstrap.min.css" rel="stylesheet" integrity="sha384-Vkoo8x4CGsO3+Hhxv8T/Q5PaXtkKtu6ug5TOeNV6gBiFeWPGFN9MuhOf23Q9Ifjh" crossorigin="anonymous">
        <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/animate.css/3.7.2/animate.min.css" integrity="sha256-PHcOkPmOshsMBC+vtJdVr5Mwb7r0LkSVJPlPrp/IMpU=" crossorigin="anonymous" />
    </head>
    <body>
        <script type="text/javascript">
            var numPlaces = 4;

            function addPlace() {
                numPlaces++;
                console.log(numPlaces);
                var place = document.createElement("DIV");
                place.id = "p" + numPlaces;

                var group1 = document.createElement("DIV");
                group1.className = "form-group";

                var label1 = document.createElement("LABEL");
                label1.className = "custom-control-label";
                label1.style.fontWeight = "bold";
                label1.innerHTML = "Place " + numPlaces;

                var address = document.createElement("INPUT");
                address.type = "text";
                address.className = "form-control";
                address.id = "place" + numPlaces;
                address.placeholder = "Enter Address of Place you Visited";

                group1.appendChild(label1);
                group1.appendChild(address);

                var group2 = document.createElement("DIV");
                group2.className = "form-group";

                var label2 = document.createElement("LABEL");
                label2.className = "custom-control-label";
                label2.innerHTML = "Enter the day you visited this place.";

                var date = document.createElement("INPUT");
                date.type = "date";
                date.className = "form-control";
                date.id = "date" + numPlaces;

                group2.appendChild(label2);
                group2.appendChild(date);

                var group3 = document.createElement("DIV");
                group3.className = "form-group";

                var label3 = document.createElement("LABEL");
                label3.className = "custom-control-label";
                label3.innerHTML = "Did you visit in the morning (A.M. times) or the afternoon (P.M. times)?";

                var amDiv = document.createElement("DIV");
                amDiv.className = "custom-control custom-radio custom-control-inline";

                var amInput = document.createElement("INPUT");
                amInput.type = "radio";
                amInput.className = "custom-control-input";
                amInput.id = "am" + numPlaces;
                amInput.name = "time" + numPlaces;

                var label4 = document.createElement("LABEL");
                label4.className = "custom-control-label";
                label4.for = amInput.id;
                label4.innerHTML = "Morning";

                amDiv.appendChild(amInput);
                amDiv.appendChild(label4);

                var pmDiv = document.createElement("DIV");
                pmDiv.className = "custom-control custom-radio custom-control-inline";

                var pmInput = document.createElement("INPUT");
                pmInput.type = "radio";
                pmInput.className = "custom-control-input";
                pmInput.id = "pm" + numPlaces;
                pmInput.name = "time" + numPlaces;

                var label5 = document.createElement("LABEL");
                label5.className = "custom-control-label";
                label5.for = pmInput.id;
                label5.innerHTML = "Afternoon";

                pmDiv.appendChild(pmInput);
                pmDiv.appendChild(label5);

                group3.appendChild(amDiv);
                group3.appendChild(pmDiv);

                place.appendChild(group1);
                place.appendChild(group2);
                place.appendChild(group3);

                document.getElementById("addedPlaces").appendChild(place);
            }
        </script>
        <div class="container">
            <nav class="navbar navbar-expand-lg navbar-light bg-light fixed-top">
              <a class="navbar-brand" href="#">Am I At Risk?</a>
              <button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbarNavDropdown" aria-controls="navbarNavDropdown" aria-expanded="false" aria-label="Toggle navigation">
                <span class="navbar-toggler-icon"></span>
              </button>
              <div class="collapse navbar-collapse" id="navbarNavDropdown">
                <ul class="navbar-nav">
                  <li class="nav-item active">
                    <a class="nav-link" href="userForm.php">Enter Details<span class="sr-only">(current)</span></a>
                  </li>
                  <li class="nav-item">
                    <a class="nav-link" href="governmentForm.php">Form for Government</a>
                  </li>
                </ul>
              </div>
            </nav>
            <br /><br /><br />
            <form>
                <div class="form-group">
                    <label>Please enter the various places you visited in the past 14 days.</label>
                </div>
                <div id="p1">
                    <div class="form-group">
                        <label class="custom-control-label"><b>Place 1</b></label>
                        <input type="text" class="form-control" id="place1" placeholder="Enter Address of Place you Visited"></input>
                    </div>
                    <div class="form-group">
                        <label class="custom-control-label">Enter the day you visited this place.</label>
                        <input type="date" class="form-control" id="date1"></input>
                    </div>
                    <div class="form-group">
                        <label class="custom-control-label">Did you visit in the morning (A.M. times) or the afternoon (P.M. times)?</label>
                        <div class="custom-control custom-radio custom-control-inline">
                            <input type="radio" class="custom-control-input" id="am1" name="time1" checked>
                            <label class="custom-control-label" for="am1">Morning</label>
                        </div>
                        <div class="custom-control custom-radio custom-control-inline">
                            <input type="radio" class="custom-control-input" id="pm1" name="time1" checked>
                            <label class="custom-control-label" for="pm1">Afternoon</label>
                        </div>
                    </div>
                </div>
                <br />

                <div id="p2">
                    <div class="form-group">
                        <label class="custom-control-label"><b>Place 2</b></label>
                        <input type="text" class="form-control" id="place2" placeholder="Enter Address of Place you Visited"></input>
                    </div>
                    <div class="form-group">
                        <label class="custom-control-label">Enter the day you visited this place.</label>
                        <input type="date" class="form-control" id="date2"></input>
                    </div>
                    <div class="form-group">
                        <label class="custom-control-label">Did you visit in the morning (A.M. times) or the afternoon (P.M. times)?</label>
                        <div class="custom-control custom-radio custom-control-inline">
                            <input type="radio" class="custom-control-input" id="am2" name="time2" checked>
                            <label class="custom-control-label" for="am2">Morning</label>
                        </div>
                        <div class="custom-control custom-radio custom-control-inline">
                            <input type="radio" class="custom-control-input" id="pm2" name="time2" checked>
                            <label class="custom-control-label" for="pm2">Afternoon</label>
                        </div>
                    </div>
                </div>
                <br />

                <div id="p3">
                    <div class="form-group">
                        <label class="custom-control-label"><b>Place 3</b></label>
                        <input type="text" class="form-control" id="place3" placeholder="Enter Address of Place you Visited"></input>
                    </div>
                    <div class="form-group">
                        <label class="custom-control-label">Enter the day you visited this place.</label>
                        <input type="date" class="form-control" id="date3"></input>
                    </div>
                    <div class="form-group">
                        <label class="custom-control-label">Did you visit in the morning (A.M. times) or the afternoon (P.M. times)?</label>
                        <div class="custom-control custom-radio custom-control-inline">
                            <input type="radio" class="custom-control-input" id="am3" name="time3" checked>
                            <label class="custom-control-label" for="am3">Morning</label>
                        </div>
                        <div class="custom-control custom-radio custom-control-inline">
                            <input type="radio" class="custom-control-input" id="pm3" name="time3" checked>
                            <label class="custom-control-label" for="pm3">Afternoon</label>
                        </div>
                    </div>
                </div>
                <br />

                <div id="p4">
                    <div class="form-group">
                        <label class="custom-control-label"><b>Place 4</b></label>
                        <input type="text" class="form-control" id="place4" placeholder="Enter Address of Place you Visited"></input>
                    </div>
                    <div class="form-group">
                        <label class="custom-control-label">Enter the day you visited this place.</label>
                        <input type="date" class="form-control" id="date4"></input>
                    </div>
                    <div class="form-group">
                        <label class="custom-control-label">Did you visit in the morning (A.M. times) or the afternoon (P.M. times)?</label>
                        <div class="custom-control custom-radio custom-control-inline">
                            <input type="radio" class="custom-control-input" id="am4" name="time4" checked>
                            <label class="custom-control-label" for="am4">Morning</label>
                        </div>
                        <div class="custom-control custom-radio custom-control-inline">
                            <input type="radio" class="custom-control-input" id="pm4" name="time4" checked>
                            <label class="custom-control-label" for="pm4">Afternoon</label>
                        </div>
                    </div>
                </div>
                <br />

                <div id="addedPlaces"></div>

                <button onclick="addPlace();">Add Place</button>


                <button type="submit" class="btn btn-primary">Submit</button>
            </form>
        </div>
    </body>
</html>

我的逻辑是逐字复制我已经为每个位置设置的输入，但将其复制到其他位置。但是，当我这样做时，它似乎刷新了页面，甚至没有添加元素。它应该将其添加到 div“addedPlaces”中。实际上，似乎是部分添加，然后立即刷新页面。

我找不到有关这个令人耳目一新的问题的信息。是否有其他方法代替 appendChild() 不会刷新页面，或者有没有办法将其设置为不刷新页面？或者有什么东西触发了我忽略的刷新？

最佳答案

按钮的默认类型是提交，因此只需在“添加位置按钮”上添加type='button' 即可解决您的问题

<!DOCTYPE html>
<html lang="en">
  <head>
    <!-- BootStrap 4 CSS -->
    <link
      rel="stylesheet"
      href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/css/bootstrap.min.css"
      integrity="sha384-Gn5384xqQ1aoWXA+058RXPxPg6fy4IWvTNh0E263XmFcJlSAwiGgFAW/dAiS6JXm"
      crossorigin="anonymous"
    />

    <!-- Jquery -->
    <script
      src="https://code.jquery.com/jquery-3.2.1.slim.min.js"
      integrity="sha384-KJ3o2DKtIkvYIK3UENzmM7KCkRr/rE9/Qpg6aAZGJwFDMVNA/GpGFF93hXpG5KkN"
      crossorigin="anonymous"
    ></script>

    <!-- BootStrap 4 JS -->
    <script
      src="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/js/bootstrap.min.js"
      integrity="sha384-JZR6Spejh4U02d8jOt6vLEHfe/JQGiRRSQQxSfFWpi1MquVdAyjUar5+76PVCmYl"
      crossorigin="anonymous"
    ></script>
    <link rel="stylesheet" type="text/css" href="./index.css" />
    <script type="text/javascript">
     var numPlaces = 4;

function addPlace() {
  numPlaces++;
  console.log(numPlaces);
  var place = document.createElement("DIV");
  place.id = "p" + numPlaces;

  var group1 = document.createElement("DIV");
  group1.className = "form-group";

  var label1 = document.createElement("LABEL");
  label1.className = "custom-control-label";
  label1.style.fontWeight = "bold";
  label1.innerHTML = "Place " + numPlaces;

  var address = document.createElement("INPUT");
  address.type = "text";
  address.className = "form-control";
  address.id = "place" + numPlaces;
  address.placeholder = "Enter Address of Place you Visited";

  group1.appendChild(label1);
  group1.appendChild(address);

  var group2 = document.createElement("DIV");
  group2.className = "form-group";

  var label2 = document.createElement("LABEL");
  label2.className = "custom-control-label";
  label2.innerHTML = "Enter the day you visited this place.";

  var date = document.createElement("INPUT");
  date.type = "date";
  date.className = "form-control";
  date.id = "date" + numPlaces;

  group2.appendChild(label2);
  group2.appendChild(date);

  var group3 = document.createElement("DIV");
  group3.className = "form-group";

  var label3 = document.createElement("LABEL");
  label3.className = "custom-control-label";
  label3.innerHTML =
    "Did you visit in the morning (A.M. times) or the afternoon (P.M. times)?";

  var amDiv = document.createElement("DIV");
  amDiv.className = "custom-control custom-radio custom-control-inline";

  var amInput = document.createElement("INPUT");
  amInput.type = "radio";
  amInput.className = "custom-control-input";
  amInput.id = "am" + numPlaces;
  amInput.name = "time" + numPlaces;

  var label4 = document.createElement("LABEL");
  label4.className = "custom-control-label";
  label4.for = amInput.id;
  label4.innerHTML = "Morning";

  amDiv.appendChild(amInput);
  amDiv.appendChild(label4);

  var pmDiv = document.createElement("DIV");
  pmDiv.className = "custom-control custom-radio custom-control-inline";

  var pmInput = document.createElement("INPUT");
  pmInput.type = "radio";
  pmInput.className = "custom-control-input";
  pmInput.id = "pm" + numPlaces;
  pmInput.name = "time" + numPlaces;

  var label5 = document.createElement("LABEL");
  label5.className = "custom-control-label";
  label5.for = pmInput.id;
  label5.innerHTML = "Afternoon";

  pmDiv.appendChild(pmInput);
  pmDiv.appendChild(label5);

  group3.appendChild(amDiv);
  group3.appendChild(pmDiv);

  place.appendChild(group1);
  place.appendChild(group2);
  place.appendChild(group3);

  document.getElementById("addedPlaces").appendChild(place);
}
    </script>
    <title>Testing App</title>
  </head>
  <body>
    <div class="container">
      <nav class="navbar navbar-expand-lg navbar-light bg-light fixed-top">
        <a class="navbar-brand" href="#">Am I At Risk?</a>
        <button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbarNavDropdown" aria-controls="navbarNavDropdown" aria-expanded="false" aria-label="Toggle navigation">
          <span class="navbar-toggler-icon"></span>
        </button>
        <div class="collapse navbar-collapse" id="navbarNavDropdown">
          <ul class="navbar-nav">
            <li class="nav-item active">
              <a class="nav-link" href="userForm.php">Enter Details<span class="sr-only">(current)</span></a>
            </li>
            <li class="nav-item">
              <a class="nav-link" href="governmentForm.php">Form for Government</a>
            </li>
          </ul>
        </div>
      </nav>
      <br /><br /><br />
      <form>
          <div class="form-group">
              <label>Please enter the various places you visited in the past 14 days.</label>
          </div>
          <div id="p1">
              <div class="form-group">
                  <label class="custom-control-label"><b>Place 1</b></label>
                  <input type="text" class="form-control" id="place1" placeholder="Enter Address of Place you Visited"></input>
              </div>
              <div class="form-group">
                  <label class="custom-control-label">Enter the day you visited this place.</label>
                  <input type="date" class="form-control" id="date1"></input>
              </div>
              <div class="form-group">
                  <label class="custom-control-label">Did you visit in the morning (A.M. times) or the afternoon (P.M. times)?</label>
                  <div class="custom-control custom-radio custom-control-inline">
                      <input type="radio" class="custom-control-input" id="am1" name="time1" checked>
                      <label class="custom-control-label" for="am1">Morning</label>
                  </div>
                  <div class="custom-control custom-radio custom-control-inline">
                      <input type="radio" class="custom-control-input" id="pm1" name="time1" checked>
                      <label class="custom-control-label" for="pm1">Afternoon</label>
                  </div>
              </div>
          </div>
          <br />

          <div id="p2">
              <div class="form-group">
                  <label class="custom-control-label"><b>Place 2</b></label>
                  <input type="text" class="form-control" id="place2" placeholder="Enter Address of Place you Visited"></input>
              </div>
              <div class="form-group">
                  <label class="custom-control-label">Enter the day you visited this place.</label>
                  <input type="date" class="form-control" id="date2"></input>
              </div>
              <div class="form-group">
                  <label class="custom-control-label">Did you visit in the morning (A.M. times) or the afternoon (P.M. times)?</label>
                  <div class="custom-control custom-radio custom-control-inline">
                      <input type="radio" class="custom-control-input" id="am2" name="time2" checked>
                      <label class="custom-control-label" for="am2">Morning</label>
                  </div>
                  <div class="custom-control custom-radio custom-control-inline">
                      <input type="radio" class="custom-control-input" id="pm2" name="time2" checked>
                      <label class="custom-control-label" for="pm2">Afternoon</label>
                  </div>
              </div>
          </div>
          <br />

          <div id="p3">
              <div class="form-group">
                  <label class="custom-control-label"><b>Place 3</b></label>
                  <input type="text" class="form-control" id="place3" placeholder="Enter Address of Place you Visited"></input>
              </div>
              <div class="form-group">
                  <label class="custom-control-label">Enter the day you visited this place.</label>
                  <input type="date" class="form-control" id="date3"></input>
              </div>
              <div class="form-group">
                  <label class="custom-control-label">Did you visit in the morning (A.M. times) or the afternoon (P.M. times)?</label>
                  <div class="custom-control custom-radio custom-control-inline">
                      <input type="radio" class="custom-control-input" id="am3" name="time3" checked>
                      <label class="custom-control-label" for="am3">Morning</label>
                  </div>
                  <div class="custom-control custom-radio custom-control-inline">
                      <input type="radio" class="custom-control-input" id="pm3" name="time3" checked>
                      <label class="custom-control-label" for="pm3">Afternoon</label>
                  </div>
              </div>
          </div>
          <br />

          <div id="p4">
              <div class="form-group">
                  <label class="custom-control-label"><b>Place 4</b></label>
                  <input type="text" class="form-control" id="place4" placeholder="Enter Address of Place you Visited"></input>
              </div>
              <div class="form-group">
                  <label class="custom-control-label">Enter the day you visited this place.</label>
                  <input type="date" class="form-control" id="date4"></input>
              </div>
              <div class="form-group">
                  <label class="custom-control-label">Did you visit in the morning (A.M. times) or the afternoon (P.M. times)?</label>
                  <div class="custom-control custom-radio custom-control-inline">
                      <input type="radio" class="custom-control-input" id="am4" name="time4" checked>
                      <label class="custom-control-label" for="am4">Morning</label>
                  </div>
                  <div class="custom-control custom-radio custom-control-inline">
                      <input type="radio" class="custom-control-input" id="pm4" name="time4" checked>
                      <label class="custom-control-label" for="pm4">Afternoon</label>
                  </div>
              </div>
          </div>
          <br />

          <div id="addedPlaces"></div>

          <button type="button" onclick="addPlace();">Add Place</button>


          <button type="submit" class="btn btn-primary">Submit</button>
      </form>
  </div>
    <!-- end of feature div  -->
   
  </body>
</html>

关于javascript - JS向表单添加输入刷新页面不输入，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/60906099/

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