如何在输入验证后从按钮中删除禁用属性？

Question

一开始，我有一个带有禁用按钮的表单，如果您将输入保留为空或填充任何内容(除了数字)，它将引发一个错误，如果您插入数字，则错误将被删除。我的问题是，在所有输入都没有错误之后，如何从按钮中删除禁用属性。到目前为止，我尝试过的是：

​

$("input").blur(function () {
  if (!Number($(this).val()) || $(this).val() === "") {
    $(this).addClass("raise-error");
  } else {
    $(this).removeClass("raise-error");
  }
});

* {
  padding: 0;
  margin: 0;
  box-sizing: border-box;
}
body {
  font-family: "Montserrat", sans-serif;
  scroll-behavior: smooth;
  text-align: center;
  overflow-x: hidden;
  color: #08085c;
  background-color: #111;
}

.container {
  width: 80%;
  height: 50vh;
  background-color: #fff;
  margin: auto;
  display: flex;
}

.team {
  width: 50%;
  height: 100%;
  display: flex;
  flex-direction: column;
  gap: 10px;
  justify-content: center;
  align-items: center;
}

.team-a {
  background-color: bisque;
}


.error {
  text-align: right;
  color: red;
  opacity: 0;
}
.raise-error + .error {
  opacity: 1;
}

input.raise-error {
  border: 1px solid red;
}
.record-box {
  margin-top: 20px;
}
label {
  margin-right: 10px;
}

.btn {
  margin-top: 20px;
  padding: 10px 20px;
  cursor: pointer;
}

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<div class="team team-a">
        <h2>Team A Records</h2>
        <div class="record-box">
          <div class="input-field">
            <label for="record-1"> Record 1</label>
            <input type="text" id="record-1" />
            <div class="error">number please</div>
          </div>
          <div class="input-field">
            <label for="record-2"> Record 2</label>
            <input type="text" id="record-2" />
            <div class="error">number please</div>
          </div>
          <div class="input-field">
            <label for="record-3"> Record 3</label>
            <input type="text" id="record-3" />
            <div class="error">number please</div>
          </div>
        </div>
      </div>
      <button class="btn" disabled>Submit</button>

​

Answer 1

您可以给输入一个默认属性(如data-valid="false".

• When )一个字段是模糊的，您可以在成功验证该属性后将该属性值更改为true。

尝尝这个

​

$("input").blur(function() {
  if (!Number($(this).val()) || $(this).val() === "") {
    $(this).addClass("raise-error");
    $(this).attr('data-valid', 'false');
  } else {
    $(this).removeClass("raise-error");
    $(this).attr('data-valid', 'true');
  }

  $('.btn')[$('[data-valid="false"]').length > 0 ? 'attr' : 'removeAttr']('disabled', 'disabled');
});

* {
  padding: 0;
  margin: 0;
  box-sizing: border-box;
}

body {
  font-family: "Montserrat", sans-serif;
  scroll-behavior: smooth;
  text-align: center;
  overflow-x: hidden;
  color: #08085c;
  background-color: #111;
}

.container {
  width: 80%;
  height: 50vh;
  background-color: #fff;
  margin: auto;
  display: flex;
}

.team {
  width: 50%;
  height: 100%;
  display: flex;
  flex-direction: column;
  gap: 10px;
  justify-content: center;
  align-items: center;
}

.team-a {
  background-color: bisque;
}

.error {
  text-align: right;
  color: red;
  opacity: 0;
}

.raise-error+.error {
  opacity: 1;
}

input.raise-error {
  border: 1px solid red;
}

.record-box {
  margin-top: 20px;
}

label {
  margin-right: 10px;
}

.btn {
  margin-top: 20px;
  padding: 10px 20px;
  cursor: pointer;
}

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<div id="some-container">
  <div class="team team-a">
    <h2>Team A Records</h2>
    <div class="record-box">
      <div class="input-field">
        <label for="record-1"> Record 1</label>
        <input type="text" id="record-1" data-valid="false" />
        <div class="error">number please</div>
      </div>
      <div class="input-field">
        <label for="record-2"> Record 2</label>
        <input type="text" id="record-2" data-valid="false" />
        <div class="error">number please</div>
      </div>
      <div class="input-field">
        <label for="record-3"> Record 3</label>
        <input type="text" id="record-3" data-valid="false" />
        <div class="error">number please</div>
      </div>
    </div>
  </div>
  <button class="btn" disabled>Submit</button>
</div>

​

Answer 2

最直接和最安全的方法是重用您的验证函数来测试输入是否有效，以及测试所有输入是否有效。

下面的示例将在allInputs变量中附加模糊的输入，如果不是所有输入都是有效的，则禁用按钮(每个函数调用相同的isValid功能)。

​

const allInputs = $("input").blur(function () {
  const isValid = val => val !== "" && Number(val);
  $(this).toggleClass("raise-error",!isValid(this.value));
  $('.btn')[0].disabled = !allInputs.toArray().every(i=>isValid(i.value));
});

* {
  padding: 0;
  margin: 0;
  box-sizing: border-box;
}
body {
  font-family: "Montserrat", sans-serif;
  scroll-behavior: smooth;
  text-align: center;
  overflow-x: hidden;
  color: #08085c;
  background-color: #111;
}

.container {
  width: 80%;
  height: 50vh;
  background-color: #fff;
  margin: auto;
  display: flex;
}

.team {
  width: 50%;
  height: 100%;
  display: flex;
  flex-direction: column;
  gap: 10px;
  justify-content: center;
  align-items: center;
}

.team-a {
  background-color: bisque;
}


.error {
  text-align: right;
  color: red;
  opacity: 0;
}
.raise-error + .error {
  opacity: 1;
}

input.raise-error {
  border: 1px solid red;
}
.record-box {
  margin-top: 20px;
}
label {
  margin-right: 10px;
}

.btn {
  margin-top: 20px;
  padding: 10px 20px;
  cursor: pointer;
}

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<div class="team team-a">
        <h2>Team A Records</h2>
        <div class="record-box">
          <div class="input-field">
            <label for="record-1"> Record 1</label>
            <input type="text" id="record-1" />
            <div class="error">number please</div>
          </div>
          <div class="input-field">
            <label for="record-2"> Record 2</label>
            <input type="text" id="record-2" />
            <div class="error">number please</div>
          </div>
          <div class="input-field">
            <label for="record-3"> Record 3</label>
            <input type="text" id="record-3" />
            <div class="error">number please</div>
          </div>
        </div>
      </div>
      <button class="btn" disabled>Submit</button>

​

Answer 3

如果下面的代码不起作用：

if ($('.raise-error').length > 0) {
  $('.btn').attr( 'disabled', true );
  return true;
}

然后，请尝试用以下方式更改按钮标签：

<input type="button" class="btn">