Validate field max greater than field 1

Hi.

How validate field max greater than field min?

I have form:


<?= Html::beginForm(['form'], 'post', ['enctype' => 'multipart/form-data', 'id' => 'form']); ?>

    <h1><b>C</b></h1>

    <label>min:

    <?= Html::input('number', 'Min', 1900, ['min' => 1800, 'max' => 2299,]); ?>

    </label>

    <label>max:

    <?= Html::input('number', 'Max', 2000, ['min' => 1800, 'max' => 2299,]); ?>

    </label>

    <h3>options</h3>


    <?= Html::checkboxList('checkboxes', [0], ['1' => '1', '2' => '2']); ?>

    <p>

        <?= Html::submitButton('Start', ['class' => 'btn btn-primary btn-lg']); ?>

    </p>

    </div>

    <?= Html::endForm(); ?>

Second question is ho to do it that minimum one checkbox must be checked.

I found that I can use compare but compare work when is model.

My form is html form, no model.

How to do it in Html form using Yii2?

hi, if you can identify the input fields using javascript, use Validator::whenClient in rules and use ActiveForm.