valid-tooltip

bootstrap5.css

.valid-tooltip {
  position: absolute;
  top: 100%;
  z-index: 5;
  display: none;
  max-width: 100%;
  padding: 0.25rem 0.5rem;
  margin-top: 0.1rem;
  font-size: 0.875rem;
  line-height: 1.5;
  color: #fff;
  background-color: rgba(40, 167, 69, 0.9);
  border-radius: 0.25rem;
}

bootstrap5.css

.was-validated .form-control:valid ~ .valid-feedback,
.was-validated .form-control:valid ~ .valid-tooltip,
.form-control.is-valid ~ .valid-feedback,
.form-control.is-valid ~ .valid-tooltip {
  display: block;
}

bootstrap5.css

.was-validated .custom-select:valid ~ .valid-feedback,
.was-validated .custom-select:valid ~ .valid-tooltip,
.custom-select.is-valid ~ .valid-feedback,
.custom-select.is-valid ~ .valid-tooltip {
  display: block;
}

bootstrap5.css

.was-validated .form-control-file:valid ~ .valid-feedback,
.was-validated .form-control-file:valid ~ .valid-tooltip,
.form-control-file.is-valid ~ .valid-feedback,
.form-control-file.is-valid ~ .valid-tooltip {
  display: block;
}

bootstrap5.css

.was-validated .form-check-input:valid ~ .valid-feedback,
.was-validated .form-check-input:valid ~ .valid-tooltip,
.form-check-input.is-valid ~ .valid-feedback,
.form-check-input.is-valid ~ .valid-tooltip {
  display: block;
}

bootstrap5.css

.was-validated .custom-control-input:valid ~ .valid-feedback,
.was-validated .custom-control-input:valid ~ .valid-tooltip,
.custom-control-input.is-valid ~ .valid-feedback,
.custom-control-input.is-valid ~ .valid-tooltip {
  display: block;
}

bootstrap5.css

.was-validated .custom-file-input:valid ~ .valid-feedback,
.was-validated .custom-file-input:valid ~ .valid-tooltip,
.custom-file-input.is-valid ~ .valid-feedback,
.custom-file-input.is-valid ~ .valid-tooltip {
  display: block;
}

bootstrap5.css

.invalid-tooltip {
  position: absolute;
  top: 100%;
  z-index: 5;
  display: none;
  max-width: 100%;
  padding: 0.25rem 0.5rem;
  margin-top: 0.1rem;
  font-size: 0.875rem;
  line-height: 1.5;
  color: #fff;
  background-color: rgba(220, 53, 69, 0.9);
  border-radius: 0.25rem;
}

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 .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 ~ .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 ~ .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-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;
}

html bootstrap5 Sample

ツールチップJS：valid-tooltip

  <!-- マウスオンで説明文を表示する -->
  <form class="needs-validation" novalidate>
    <div class="form-row">
      <div class="col-md-6 mb-3">
        <label for="validation01">姓</label>
        <input type="text" class="form-control" id="validation01" placeholder="First name" value="山田" required>
        <div class="valid-tooltip"> 入力済！ </div>
      </div>
      <div class="col-md-6 mb-3">
        <label for="validation02">名</label>
        <input type="text" class="form-control" id="validation02" placeholder="Last name" value="太郎" required>
        <div class="valid-tooltip"> 入力済！ </div>
      </div>
    </div>
    <div class="form-row">
      <div class="col-md-6 mb-3">
        <label for="validation03">市町村</label>
        <input type="text" class="form-control" id="validation03" placeholder="市町村名を入力" required>
        <div class="invalid-tooltip"> 市町村名を入力してください </div>
      </div>
      <div class="col-md-3 mb-3">
        <label for="validation04">都道府県</label>
        <input type="text" class="form-control" id="validation04" placeholder="都道府県名を入力" required>
        <div class="invalid-tooltip"> 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="validation05">郵便番号</label>
        <input type="text" class="form-control" id="validation05" placeholder="郵便番号を入力" required>
        <div class="invalid-tooltip"> 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>
  <!-- 無効な入力がある場合にフォームの送信を無効にする -->
  <script>
    (function () {
      'use strict';
      window.addEventListener('load', function () {
        // Bootstrapのフォームの入力検証スタイルを適用するフォームを取得
        var forms = document.getElementsByClassName('needs-validation');
        // ループして帰順を防ぐ
        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>