is-invalid

bootstrap5.css

bootstrap5.css
.was-validated .form-control:invalid:focus,
.form-control.is-invalid:focus {
  border-color: #dc3545;
  box-shadow: 0 0 0 0.2rem rgba(220, 53, 69, 0.25);
}
bootstrap5.css
.was-validated .form-control:invalid ~ .invalid-feedback,
.was-validated .form-control:invalid ~ .invalid-tooltip,
.form-control.is-invalid ~ .invalid-feedback,
.form-control.is-invalid ~ .invalid-tooltip {
  display: block;
}
bootstrap5.css
.was-validated textarea.form-control:invalid,
textarea.form-control.is-invalid {
  padding-right: calc(1.5em + 0.75rem);
  background-position: top calc(0.375em + 0.1875rem) right calc(0.375em + 0.1875rem);
}
bootstrap5.css
.was-validated .custom-select:invalid:focus,
.custom-select.is-invalid:focus {
  border-color: #dc3545;
  box-shadow: 0 0 0 0.2rem rgba(220, 53, 69, 0.25);
}
bootstrap5.css
.was-validated .custom-select:invalid ~ .invalid-feedback,
.was-validated .custom-select:invalid ~ .invalid-tooltip,
.custom-select.is-invalid ~ .invalid-feedback,
.custom-select.is-invalid ~ .invalid-tooltip {
  display: block;
}
bootstrap5.css
.was-validated .form-control-file:invalid ~ .invalid-feedback,
.was-validated .form-control-file:invalid ~ .invalid-tooltip,
.form-control-file.is-invalid ~ .invalid-feedback,
.form-control-file.is-invalid ~ .invalid-tooltip {
  display: block;
}
bootstrap5.css
.was-validated .form-check-input:invalid ~ .form-check-label,
.form-check-input.is-invalid ~ .form-check-label {
  color: #dc3545;
}
bootstrap5.css
.was-validated .form-check-input:invalid ~ .invalid-feedback,
.was-validated .form-check-input:invalid ~ .invalid-tooltip,
.form-check-input.is-invalid ~ .invalid-feedback,
.form-check-input.is-invalid ~ .invalid-tooltip {
  display: block;
}
bootstrap5.css
.was-validated .custom-control-input:invalid ~ .custom-control-label,
.custom-control-input.is-invalid ~ .custom-control-label {
  color: #dc3545;
}
bootstrap5.css
.was-validated .custom-control-input:invalid ~ .custom-control-label::before,
.custom-control-input.is-invalid ~ .custom-control-label::before {
  border-color: #dc3545;
}
bootstrap5.css
.was-validated .custom-control-input:invalid ~ .invalid-feedback,
.was-validated .custom-control-input:invalid ~ .invalid-tooltip,
.custom-control-input.is-invalid ~ .invalid-feedback,
.custom-control-input.is-invalid ~ .invalid-tooltip {
  display: block;
}
bootstrap5.css
.was-validated .custom-control-input:invalid:checked ~ .custom-control-label::before,
.custom-control-input.is-invalid:checked ~ .custom-control-label::before {
  border-color: #e4606d;
  background-color: #e4606d;
}
bootstrap5.css
.was-validated .custom-control-input:invalid:focus ~ .custom-control-label::before,
.custom-control-input.is-invalid:focus ~ .custom-control-label::before {
  box-shadow: 0 0 0 0.2rem rgba(220, 53, 69, 0.25);
}
bootstrap5.css
.was-validated .custom-control-input:invalid:focus:not(:checked) ~ .custom-control-label::before,
.custom-control-input.is-invalid:focus:not(:checked) ~ .custom-control-label::before {
  border-color: #dc3545;
}
bootstrap5.css
.was-validated .custom-file-input:invalid ~ .custom-file-label,
.custom-file-input.is-invalid ~ .custom-file-label {
  border-color: #dc3545;
}
bootstrap5.css
.was-validated .custom-file-input:invalid ~ .invalid-feedback,
.was-validated .custom-file-input:invalid ~ .invalid-tooltip,
.custom-file-input.is-invalid ~ .invalid-feedback,
.custom-file-input.is-invalid ~ .invalid-tooltip {
  display: block;
}
bootstrap5.css
.was-validated .custom-file-input:invalid:focus ~ .custom-file-label,
.custom-file-input.is-invalid:focus ~ .custom-file-label {
  border-color: #dc3545;
  box-shadow: 0 0 0 0.2rem rgba(220, 53, 69, 0.25);
}

html bootstrap5 Sample

サーバー側で入力検証を行う場合：is-valid

市町村名を入力してください
都道府県名を入力してください
郵便番号を入力してください
  <form>
    <div class="form-row">
      <div class="col-md-6 mb-3">
        <label for="validationServer01">姓</label>
        <input type="text" class="form-control is-valid" id="validationServer01" placeholder="First name" value="山田"
          required>
      </div>
      <div class="col-md-6 mb-3">
        <label for="validationServer02">名</label>
        <input type="text" class="form-control is-valid" id="validationServer02" placeholder="Last name" value="太郎"
          required>
      </div>
    </div>
    <div class="form-row">
      <div class="col-md-6 mb-3">
        <label for="validationServer03">市町村</label>
        <input type="text" class="form-control is-invalid" id="validationServer03" placeholder="市町村名を入力" required>
        <div class="invalid-feedback">市町村名を入力してください</div>
      </div>
      <div class="col-md-3 mb-3">
        <label for="validationServer04">都道府県</label>
        <input type="text" class="form-control is-invalid" id="validationServer04" placeholder="都道府県名を入力" required>
        <div class="invalid-feedback">都道府県名を入力してください</div>
      </div>
      <div class="col-md-3 mb-3">
        <label for="validationServer05">郵便番号</label>
        <input type="text" class="form-control is-invalid" id="validationServer05" placeholder="郵便番号を入力" required>
        <div class="invalid-feedback">郵便番号を入力してください</div>
      </div>
    </div>
    <button class="btn btn-primary" type="submit">送信する</button>
  </form>