如何从有效控件禁用引导程序 4 验证样式

Question

如何从有效控件禁用引导程序 4 验证样式

Pra*_*dha 13 html javascript css jquery bootstrap-4

我正在为我的应用程序使用 bootstrap 4 样式。应用程序有两个文本框和一个提交按钮。当您单击“保存”按钮时，它将调用 Web API 并异步获取一些详细信息（它不会重定向页面）。验证仅适用于第一个文本框。

(function() {
  'use strict';
  window.addEventListener('load', function() {
    // Fetch all the forms we want to apply custom Bootstrap validation styles to
    var forms = document.getElementsByClassName('needs-validation');
    // Loop over them and prevent submission
    var validation = Array.prototype.filter.call(forms, function(form) {
      form.addEventListener('submit', function(event) {
        if (form.checkValidity() === false) {
          event.preventDefault();
          event.stopPropagation();
        }
        form.classList.add('was-validated');
      }, false);
    });
  }, false);
})();

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<!DOCTYPE html>
<html>

<head>
  <!-- Required meta tags -->
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
  <script src="https://code.jquery.com/jquery-3.3.1.slim.min.js" integrity="sha384-q8i/X+965DzO0rT7abK41JStQIAqVgRVzpbzo5smXKp4YfRvH+8abtTE1Pi6jizo" crossorigin="anonymous"></script>
  <script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.14.7/umd/popper.min.js" integrity="sha384-UO2eT0CpHqdSJQ6hJty5KVphtPhzWj9WO1clHTMGa3JDZwrnQq4sF86dIHNDz0W1" crossorigin="anonymous"></script>
  <script src="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/js/bootstrap.min.js" integrity="sha384-JjSmVgyd0p3pXB1rRibZUAYoIIy6OrQ6VrjIEaFf/nJGzIxFDsf4x0xIM+B07jRM" crossorigin="anonymous"></script>
  <!-- Bootstrap CSS -->
  <link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/css/bootstrap.min.css" integrity="sha384-ggOyR0iXCbMQv3Xipma34MD+dH/1fQ784/j6cY/iJTQUOhcWr7x9JvoRxT2MZw1T" crossorigin="anonymous">
  <title>Test Page</title>
</head>

<body>
  <form class="container needs-validation" novalidate>
    <div class="form-group row mt-5">
      <label for="txtSessionDescription" class="col-2 col-md-2 col-sm-2 col-form-label">Name</label>
      <div class="col-sm-10">
        <input type="tel" class="form-control" placeholder="Please enter your name" required />
        <div class="invalid-feedback">
          Please enter the name.
        </div>
      </div>
    </div>
    <div class="form-group row mt-5">
      <label for="txtSessionDescription" class="col-2 col-md-2 col-sm-2 col-form-label">Address:</label>
      <div class="col-sm-10">
        <input type="tel" class="form-control" />
      </div>
    </div>
    <div class="form-group row">
      <input type="submit" class="btn btn-primary" style="width: 100px;" value="Save" />
    </div>
  </form>
</body>

</html>

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我的问题：

当我单击“保存”按钮而不在文本框中输入任何值时，绿色样式（验证真实样式）将应用于“地址”文本框。我不希望这种情况发生。

如果验证失败，我只需要应用红色样式（验证失败样式）。如果输入了值（验证为真），我不需要将任何样式应用于文本框。

此外，当我在“名称”文本框中输入一些值并单击“保存”按钮时，我不希望该文本框使用绿色样式。

截屏：

Answer 1

小智 9

一方面，我不喜欢覆盖 CSS 样式，因此您也可以选择仅指定要验证的字段而不是整个表单。

为您的.form-group元素添加一个类（例如.validate-me）

    <form class="container needs-validation" novalidate>
        <div class="form-group row mt-5 validate-me">
            <label for="txtSessionDescription" class="col-2 col-md-2 col-sm-2 col-form-label">Name</label>
            <div class="col-sm-10">
                <input type="text" class="form-control" placeholder="Please enter your name" required />
                <div class="invalid-feedback">
                    Please enter the name.
                </div>
            </div>
        </div>
        <div class="form-group row mt-5">
            <label for="txtSessionDescription" class="col-2 col-md-2 col-sm-2 col-form-label">Address:</label>
            <div class="col-sm-10">
                <input type="tel" class="form-control" formnovalidate="formnovalidate" id="address" />
            </div>
        </div>
        <div class="form-group row">
            <input type="submit" class="btn btn-primary" style="width: 100px;" value="Save"/>
        </div>
    </form>

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现在稍微改变你的 JavaScript，form-group用validate-me类检索所有的s，而不是form.classList.add('was-validated')通过所有捕获的表单组调用循环并添加was-validated到它们中。

window.addEventListener('load', function () {
                // Fetch all the forms we want to apply custom Bootstrap validation styles to
                var forms = document.getElementsByClassName('needs-validation');

                // Get all form-groups in need of validation
                var validateGroup = document.getElementsByClassName('validate-me');

                // Loop over them and prevent submission
                var validation = Array.prototype.filter.call(forms, function (form) {
                    form.addEventListener('submit', function (event) {
                        if (form.checkValidity() === false) {
                            event.preventDefault();
                            event.stopPropagation();
                        }

                        //Added validation class to all form-groups in need of validation
                        for (var i = 0; i < validateGroup.length; i++) {
                            validateGroup[i].classList.add('was-validated');
                        }
                    }, false);
                });
            }, false);

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我不认为这提供了问题的答案。这让您可以选择要验证的字段，而问题是禁用所有字段的有效样式。 (4认同)

Answer 2

Zac*_*Zac 6

您可能想看看这个答案。

具体来说，不是添加.was-validated到整个表单，而是只添加.is-invalid到具有:invalid伪类的表单元素。

此代码应该适用于您的情况：

for (var i = 0; i < validateGroup.length; i++) {
    var invalidGroup = validateGroup[i].querySelectorAll(":invalid");
    for (var j = 0; j < invalidGroup.length; j++) {
        invalidGroup[j].classList.add('is-invalid');
    }
}

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我也是这样完成这个任务的。但是，我将一个事件侦听器附加到每个无效字段，以便在值更改时删除“is-invalid”类。这允许用户更新无效字段并重新提交。`invalidGroup[j].addEventListener("input", e => e.target.classList.remove("is-invalid"), { Once: true });` (2认同)

Answer 3

Ilk*_*urk 5

您可以覆盖 is-valid 验证的 css。当您右键单击绿色复选框并选择检查时，您可以看到哪个类导致绿灯亮起

所以你应该指定不从 bootstrap 继承那些。代码应该是这样的：

<!DOCTYPE html>
<html>
<head>
  <style>
    .form-control.is-valid:focus, .was-validated :valid.form-control{ border-color:inherit !important;
    background-image: inherit !important;
    box-shadow:inherit !important;}

 </style>
    <!-- Required meta tags -->
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
    <script src="https://code.jquery.com/jquery-3.3.1.slim.min.js" integrity="sha384-q8i/X+965DzO0rT7abK41JStQIAqVgRVzpbzo5smXKp4YfRvH+8abtTE1Pi6jizo" crossorigin="anonymous"></script>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.14.7/umd/popper.min.js" integrity="sha384-UO2eT0CpHqdSJQ6hJty5KVphtPhzWj9WO1clHTMGa3JDZwrnQq4sF86dIHNDz0W1" crossorigin="anonymous"></script>
    <script src="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/js/bootstrap.min.js" integrity="sha384-JjSmVgyd0p3pXB1rRibZUAYoIIy6OrQ6VrjIEaFf/nJGzIxFDsf4x0xIM+B07jRM" crossorigin="anonymous"></script>
    <!-- Bootstrap CSS -->
    <link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/css/bootstrap.min.css" integrity="sha384-ggOyR0iXCbMQv3Xipma34MD+dH/1fQ784/j6cY/iJTQUOhcWr7x9JvoRxT2MZw1T" crossorigin="anonymous">
    <title>Test Page</title>
    <script type="text/javascript">
        (function () {
            'use strict';
            window.addEventListener('load', function () {
                // Fetch all the forms we want to apply custom Bootstrap validation styles to
                var forms = document.getElementsByClassName('needs-validation');
                // Loop over them and prevent submission
                var validation = Array.prototype.filter.call(forms, function (form) {
                    form.addEventListener('submit', function (event) {
                        if (form.checkValidity() === false) {
                            event.preventDefault();
                            event.stopPropagation();
                        }
                        form.classList.add('was-validated');
                    }, false);
                });
            }, false);
        })();
    </script>

</head>
<body>
    <form class="container needs-validation" novalidate id="myFrom" >
        <div class="form-group row mt-5">
            <label for="txtSessionDescription" class="col-2 col-md-2 col-sm-2 col-form-label">Name</label>
            <div class="col-sm-10">
                <input type="tel" class="form-control" placeholder="Please enter your name" required />
                <div class="invalid-feedback">
                    Please enter the name.
                </div>
            </div>
        </div>
        <div class="form-group row mt-5">
            <label for="txtSessionDescription" class="col-2 col-md-2 col-sm-2 col-form-label">Address:</label>
            <div class="col-sm-10">
                <input type="tel" class="form-control" />
            </div>
        </div>
        <div class="form-group row">
            <input type="submit" class="btn btn-primary" style="width: 100px;" value="Save"/>
        </div>
    </form>
</body>
</html>

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我添加的是head标签下面的style标签和css选项。

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