Why is the form generating so many requests?

Question

Yii

Created a form using ActiveForm and wrapped in pjax:

<?php Pjax::begin(['enablePushState' => false, 'timeout' => false, 'id' => 'addTaskPjax']) ?>
            <?php $form = ActiveForm::begin([
                'options' => [
                    'data-pjax' => '',
                    'id' => 'formAddTask',
                    'onSubmit' => 'formSubmit()' // удаляет кнопку "добавить"
                ]
            ]) ?>
            <div class="card-content white-text">
                <span class="card-title" style="font-size: 20px">Добавить задачу</span>
                <?= $form->field($model, 'name', [
                    'labelOptions' => [
                        'style' => 'font-size: 14px'
                    ]
                ])->textInput(
                    [
                        'style' => [
                            'color' => 'white'
                        ]
                    ]) ?>
                <?= $form->field($model, 'description', [
                    'labelOptions' => [
                        'style' => 'font-size: 14px'
                    ]
                ])->textarea([
                    'style' => [
                        'resize' => 'none',
                        'height' => '300px'
                    ]
                ]) ?>
                <label style="font-size: 14px; color: white">Привлечь работников</label><br>
                <?php foreach ($users as $user): ?>
                    <label>
                        <input type="checkbox" class="filled-in" name="workers[]" value="<?= $user->id ?>"/>
                        <span style="font-size: 14px; color: white; margin-left: 10px"><?= $user->last_name ?>
                            (<?= $user->login ?>)</span>
                    </label>
                <?php endforeach; ?>
                <div class="card-action">
                    <?= Html::submitButton('Добавить', [
                            'class' => 'waves-effect waves-light btn',
                            'id' => 'submitAddTask'
                    ]) ?>
                    <br>
                    <?php if ($message): ?>
                        <div class="card-panel red lighten-2"> <?= $message ?> </div>
                    <?php endif; ?>
                </div>

                <?php ActiveForm::end() ?>
            </div>

            <?php Pjax::end() ?>

But when submitting the form, an indefinite number of requests are generated somehow (sometimes 6, sometimes 3, sometimes 1), how can this happen?

Yes, in the screenshot these requests are without code 200, but somehow I create records in the database according to the number of these requests, the controller simply writes data from the form to the database and that's it. What is the problem?

Answer 1

Perhaps you have a loop in this place:

'onSubmit' => 'formSubmit()' // удаляет кнопку "добавить"