如何检测是否有任何输入为空？

Question

我刚开始使用 JavaScript 和 jQuery，遇到了一些问题，我什至不知道如何开始解决。我正在编写教师成绩簿。每当用户运行 saveScores() 函数时，如果在 NOT 折叠的类别中有 ANY 分数留空，则应发送警报。否则，如果所有分数都已填写，则应提交页面上的表格。

分数的示例 HTML： <td class='score'> <input type='text' name='grades[26][32]'> /10 </td>

我想我需要运行一个循环，但我无法弄清楚的部分是折叠部分。我将如何仅在未折叠的类别上运行循环？另外，这个循环会是什么样子？

非常感谢任何建议、解决方案或有用的文章。

对于视觉人士：如果在此示例中运行该函数，则会发送警报，因为红色圆圈中的输入为空。 “词汇工作表”下的所有分数都将被忽略，因为该类别现在已折叠。

$(document).ready(function() {
  $('[data-toggle="toggle"]').change(function() {
    $(this).parents().next('.hide').toggle();
  });
});

$("input[type=text]").change(function() {
  $('.floater').get(0).style.display = 'block';
});

var confirm = document.getElementById("confirm");

function saveScores(arg) {
  /* If all scores are filled in */
  {
    document.getElementByTagName("form").submit();
  }
  /* Else if any score is blank */
  {
    alert("A score is left blank!");
  } else if (arg == "hide") {
    confirm.style.display = "none";
  }
}
window.onclick = function(event) {
  if (event.target == confirm) {
    confirm.style.display = "none";
  }
}

body {
  margin: 0;
  background-color: #F2F2F2;
}

.topbar {
  z-index: 10;
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 56px;
  font-size: x-large;
  background-color: #5B7042;
  border-bottom: 4px solid #3F5328
}

#btmbar {
  display: inline-block;
  grid-area: btmbar;
  border-top: 2px solid darkgray;
  background-color: #F2F2F2;
}

#content {
  margin-top: 60px;
  margin-left: auto;
  margin-right: auto;
  width: 80vw;
  height: calc(100vh-60px);
}

table {
  width: 100%;
  border-collapse: collapse;
}

.labels td {
  text-align: center;
  color: black;
  padding: 16px;
  border-bottom: 1px solid gray
}

td {
  padding-top: 14px;
  padding-bottom: 14px;
  border-bottom: 0.5px solid gray
}

.name {
  display: flex;
  justify-content: start;
  align-items: center;
  font-size: 18px
}

.name .pic {
  display: inline-block;
  width: 35px;
  clip-path: circle();
  margin-right: 10px;
}

.date {
  color: gray;
  font-size: 15px
}

.comment input {
  padding: 10px;
  border-radius: 6px;
  font-size: 16px;
  width: 90%;
}

.score input {
  text-align: center;
  padding: 10px;
  border-radius: 6px;
  font-size: 16px;
  width: 50px;
}

[data-toggle="toggle"] {
  display: none;
}

.floater {
  display: none;
  position: fixed;
  bottom: 16px;
  right: 10px;
}

.floater button {
  padding: 12px;
  font-size: 18px
}


/* ----------[MODAL]---------- */

.modal {
  display: none;
  position: fixed;
  z-index: 20;
  right: 0;
  top: 0;
  width: 100%;
  height: 100%;
  overflow: auto;
  background-color: rgba(0, 0, 0, 0.4);
  -webkit-animation-name: fadeIn;
  -webkit-animation-duration: 0.4s;
  animation-name: fadeIn;
  animation-duration: 0.4s
}

.confirm-window {
  display: block;
  position: fixed;
  overflow: hidden;
  width: 500px;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  border-radius: 6px;
  background-color: white;
  transition: height 0.5s;
}

.modal-top {
  display: flex;
  justify-content: center;
  flex-direction: column;
  padding-left: 10px;
  box-sizing: border-box;
  width: 100%;
  height: 30px;
  font-size: 20px;
  color: white;
  background-color: #5B7042
}

.modal-content {
  padding: 16px;
  text-align: center;
  margin-bottom: 10px
}

.modal-content .desc {
  margin-bottom: 20px;
}

.modal label {
  display: block;
  margin-bottom: 10px;
  text-align: left;
}

.modal-controls {
  width: 100%;
  display: flex;
  justify-content: space-around;
  align-items: center;
  padding-bottom: 16px
}

.modal-controls button {
  width: 40%
}

<link rel='stylesheet' href='https://classcolonies.com/resources/style.css'>

<div class='topbar'></div>

<div id='content'>
  <form action='score.int.php' method='POST'>
    <table>
      <colgroup>
        <col width='20%'>
        <col width='20%'>
        <col width='30%'>
        <col width='10%'>
      </colgroup>
      <tbody class='labels'>
        <tr>
          <td colspan='4'>
            <label for="1">American Revolution</label>
            <input type="checkbox" id="1" data-toggle="toggle">
          </td>
        </tr>
      </tbody>
      <tbody class='hide'>
        <tr>
          <td class='name'>
            <img class='pic' src='https://mrdansby.com/resources/pics/1.png'>
            <span>John Doe</span>
          </td>
          <td class='date'> Fri, Jul 22 at 3:15 PM </td>
          <td class='comment'> <input type='text'> </td>
          <td class='score'> <input type='text'> /10 </td>
        </tr>
        <tr>
          <td class='name'>
            <img class='pic' src='https://mrdansby.com/resources/pics/1.png'>
            <span>Jane Doe</span>
          </td>
          <td class='date'> Fri, Jul 22 at 3:15 PM </td>
          <td class='comment'> <input type='text'> </td>
          <td class='score'> <input type='text'> /10 </td>
        </tr>
      </tbody>
      <tbody class='labels'>
        <tr>
          <td colspan='4'>
            <label for="2">Vocabulary Worksheet</label>
            <input type="checkbox" id="2" data-toggle="toggle">
          </td>
        </tr>
      </tbody>
      <tbody class='hide'>
        <tr>
          <td class='name'>
            <img class='pic' src='https://mrdansby.com/resources/pics/1.png'>
            <span>John Doe</span>
          </td>
          <td class='date'> Fri, Jul 22 at 3:15 PM </td>
          <td class='comment'> <input type='text'> </td>
          <td class='score'> <input type='text'> /10 </td>
        </tr>
        <tr>
          <td class='name'>
            <img class='pic' src='https://mrdansby.com/resources/pics/1.png'>
            <span>Jane Doe</span>
          </td>
          <td class='date'> Fri, Jul 22 at 3:15 PM </td>
          <td class='comment'> <input type='text'> </td>
          <td class='score'> <input type='text'> /10 </td>
        </tr>
      </tbody>
      <tbody class='labels'>
        <tr>
          <td colspan='4'>
            <label for="3">Interactive Notebook</label>
            <input type="checkbox" id="3" data-toggle="toggle">
          </td>
        </tr>
      </tbody>
      <tbody class='hide'>
        <tr>
          <td class='name'>
            <img class='pic' src='https://mrdansby.com/resources/pics/1.png'>
            <span>John Doe</span>
          </td>
          <td class='date'> Fri, Jul 22 at 3:15 PM </td>
          <td class='comment'> <input type='text'> </td>
          <td class='score'> <input type='text'> /10 </td>
        </tr>
        <tr>
          <td class='name'>
            <img class='pic' src='https://mrdansby.com/resources/pics/1.png'>
            <span>Jane Doe</span>
          </td>
          <td class='date'> Fri, Jul 22 at 3:15 PM </td>
          <td class='comment'> <input type='text'> </td>
          <td class='score'> <input type='text'> /10 </td>
        </tr>
      </tbody>
    </table>
  </form>
</div>

<div class='floater'>
  <button class='button green-btn' onclick='saveScores("show");'>Record</button>
</div>


<div id="confirm" class="modal">
  <div class="confirm-window">
    <div class='modal-top'></div>
    <div class='modal-content'>
      <div class='desc'>There are scores left blank. How should these be handled?</div>
      <label>
          <input type='checkbox'>
          Reset streak
        </label>
      <label>
          <input type='checkbox'>
          Mark as zero
        </label>
      <label>
          <input type='checkbox'>
          Send back to student
        </label>
    </div>
    <div class='modal-controls'>
      <button class='button grey-btn' onclick='saveScores("hide");'>Cancel</button>
      <button class='button green-btn'>Save Scores</button>
    </div>
  </div>
</div>

Answer 1

您可以按值过滤输入数组并过滤掉隐藏的tbody，例如

allscoresfilled = $('tbody:not(:hidden) td.score input').filter(function() {
    return !this.value;
  }).length === 0

$(document).ready(function() {
  $('[data-toggle="toggle"]').change(function() {
    $(this).parents().next('.hide').toggle();
  });
});

$("input[type=text]").change(function() {
  $('.floater').get(0).style.display = 'block';
});

var confirm = document.getElementById("confirm");

function saveScores(arg) {
  let allscoresfilled = $('tbody:not(:hidden) td.score input').filter(function() {
    return !this.value;
  }).length === 0
 

  if (allscoresfilled) {
    document.querySelector("form").submit();
  } else {
    alert("A score is left blank!");
  }

  if (arg == "hide") {
    confirm.style.display = "none";
  }
}
window.onclick = function(event) {
  if (event.target == confirm) {
    confirm.style.display = "none";
  }
}

body {
  margin: 0;
  background-color: #F2F2F2;
}

.topbar {
  z-index: 10;
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 56px;
  font-size: x-large;
  background-color: #5B7042;
  border-bottom: 4px solid #3F5328
}

#btmbar {
  display: inline-block;
  grid-area: btmbar;
  border-top: 2px solid darkgray;
  background-color: #F2F2F2;
}

#content {
  margin-top: 60px;
  margin-left: auto;
  margin-right: auto;
  width: 80vw;
  height: calc(100vh-60px);
}

table {
  width: 100%;
  border-collapse: collapse;
}

.labels td {
  text-align: center;
  color: black;
  padding: 16px;
  border-bottom: 1px solid gray
}

td {
  padding-top: 14px;
  padding-bottom: 14px;
  border-bottom: 0.5px solid gray
}

.name {
  display: flex;
  justify-content: start;
  align-items: center;
  font-size: 18px
}

.name .pic {
  display: inline-block;
  width: 35px;
  clip-path: circle();
  margin-right: 10px;
}

.date {
  color: gray;
  font-size: 15px
}

.comment input {
  padding: 10px;
  border-radius: 6px;
  font-size: 16px;
  width: 90%;
}

.score input {
  text-align: center;
  padding: 10px;
  border-radius: 6px;
  font-size: 16px;
  width: 50px;
}

[data-toggle="toggle"] {
  display: none;
}

.floater {
  display: none;
  position: fixed;
  bottom: 16px;
  right: 10px;
}

.floater button {
  padding: 12px;
  font-size: 18px
}


/* ----------[MODAL]---------- */

.modal {
  display: none;
  position: fixed;
  z-index: 20;
  right: 0;
  top: 0;
  width: 100%;
  height: 100%;
  overflow: auto;
  background-color: rgba(0, 0, 0, 0.4);
  -webkit-animation-name: fadeIn;
  -webkit-animation-duration: 0.4s;
  animation-name: fadeIn;
  animation-duration: 0.4s
}

.confirm-window {
  display: block;
  position: fixed;
  overflow: hidden;
  width: 500px;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  border-radius: 6px;
  background-color: white;
  transition: height 0.5s;
}

.modal-top {
  display: flex;
  justify-content: center;
  flex-direction: column;
  padding-left: 10px;
  box-sizing: border-box;
  width: 100%;
  height: 30px;
  font-size: 20px;
  color: white;
  background-color: #5B7042
}

.modal-content {
  padding: 16px;
  text-align: center;
  margin-bottom: 10px
}

.modal-content .desc {
  margin-bottom: 20px;
}

.modal label {
  display: block;
  margin-bottom: 10px;
  text-align: left;
}

.modal-controls {
  width: 100%;
  display: flex;
  justify-content: space-around;
  align-items: center;
  padding-bottom: 16px
}

.modal-controls button {
  width: 40%
}

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<link rel='stylesheet' href='https://classcolonies.com/resources/style.css'>

<div class='topbar'></div>

<div id='content'>
  <form action='score.int.php' method='POST'>
    <table>
      <colgroup>
        <col width='20%'>
        <col width='20%'>
        <col width='30%'>
        <col width='10%'>
      </colgroup>
      <tbody class='labels'>
        <tr>
          <td colspan='4'>
            <label for="1">American Revolution</label>
            <input type="checkbox" id="1" data-toggle="toggle">
          </td>
        </tr>
      </tbody>
      <tbody class='hide'>
        <tr>
          <td class='name'>
            <img class='pic' src='https://mrdansby.com/resources/pics/1.png'>
            <span>John Doe</span>
          </td>
          <td class='date'> Fri, Jul 22 at 3:15 PM </td>
          <td class='comment'> <input type='text'> </td>
          <td class='score'> <input type='text'> /10 </td>
        </tr>
        <tr>
          <td class='name'>
            <img class='pic' src='https://mrdansby.com/resources/pics/1.png'>
            <span>Jane Doe</span>
          </td>
          <td class='date'> Fri, Jul 22 at 3:15 PM </td>
          <td class='comment'> <input type='text'> </td>
          <td class='score'> <input type='text'> /10 </td>
        </tr>
      </tbody>
      <tbody class='labels'>
        <tr>
          <td colspan='4'>
            <label for="2">Vocabulary Worksheet</label>
            <input type="checkbox" id="2" data-toggle="toggle">
          </td>
        </tr>
      </tbody>
      <tbody class='hide'>
        <tr>
          <td class='name'>
            <img class='pic' src='https://mrdansby.com/resources/pics/1.png'>
            <span>John Doe</span>
          </td>
          <td class='date'> Fri, Jul 22 at 3:15 PM </td>
          <td class='comment'> <input type='text'> </td>
          <td class='score'> <input type='text'> /10 </td>
        </tr>
        <tr>
          <td class='name'>
            <img class='pic' src='https://mrdansby.com/resources/pics/1.png'>
            <span>Jane Doe</span>
          </td>
          <td class='date'> Fri, Jul 22 at 3:15 PM </td>
          <td class='comment'> <input type='text'> </td>
          <td class='score'> <input type='text'> /10 </td>
        </tr>
      </tbody>
      <tbody class='labels'>
        <tr>
          <td colspan='4'>
            <label for="3">Interactive Notebook</label>
            <input type="checkbox" id="3" data-toggle="toggle">
          </td>
        </tr>
      </tbody>
      <tbody class='hide'>
        <tr>
          <td class='name'>
            <img class='pic' src='https://mrdansby.com/resources/pics/1.png'>
            <span>John Doe</span>
          </td>
          <td class='date'> Fri, Jul 22 at 3:15 PM </td>
          <td class='comment'> <input type='text'> </td>
          <td class='score'> <input type='text'> /10 </td>
        </tr>
        <tr>
          <td class='name'>
            <img class='pic' src='https://mrdansby.com/resources/pics/1.png'>
            <span>Jane Doe</span>
          </td>
          <td class='date'> Fri, Jul 22 at 3:15 PM </td>
          <td class='comment'> <input type='text'> </td>
          <td class='score'> <input type='text'> /10 </td>
        </tr>
      </tbody>
    </table>
  </form>
</div>

<div class='floater'>
  <button class='button green-btn' onclick='saveScores("show");'>Record</button>
</div>


<div id="confirm" class="modal">
  <div class="confirm-window">
    <div class='modal-top'></div>
    <div class='modal-content'>
      <div class='desc'>There are scores left blank. How should these be handled?</div>
      <label>
          <input type='checkbox'>
          Reset streak
        </label>
      <label>
          <input type='checkbox'>
          Mark as zero
        </label>
      <label>
          <input type='checkbox'>
          Send back to student
        </label>
    </div>
    <div class='modal-controls'>
      <button class='button grey-btn' onclick='saveScores("hide");'>Cancel</button>
      <button class='button green-btn'>Save Scores</button>
    </div>
  </div>
</div>