如何在Yii2网格视图中调用PJAX？

Question

我使用pjax在yii2网格中使用常见搜索。我想要的是在keyup事件上激活pjax。默认它使用onchange事件或onsubmit事件。

的index.php

     <div class="pull-right">
            <?=$this->render('_search', array('model'=>$searchModel));?>
     </div>   
     <?php Pjax::begin(['id' => 'assets','enablePushState' => false]); ?>            
        <?=
        GridView::widget([
            'dataProvider' => $dataProvider,
            'filterModel' => $searchModel,
              --Coloumns--
                ],

                ['class' => 'yii\grid\ActionColumn',            

                    ],
                ]);
                ?>
    <?php Pjax::end(); ?> 

_search.php

<?php
use yii\helpers\Html;
use yii\widgets\ActiveForm;
?>
<?php
 $this->registerJs(
   '$("document").ready(function(){ 
        $("#search-form").on("pjax:end", function() {
            $.pjax.reload({container:"#assets"});  
        }); 

    });'
);
?>
<div class="assets-search">
 <?php yii\widgets\Pjax::begin(['id' => 'search-form']) ?>
    <?php $form = ActiveForm::begin([
        'options' => ['data-pjax' => true ],
        'action' => ['search'],
        'method' => 'get',

    ]); ?>

    <?= $form->field($model, 'searchString') ?>

    <?php ActiveForm::end(); ?>
<?php yii\widgets\Pjax::end() ?>
</div>

我需要做什么来实现onkeyup搜索而不是onsubmit或onchange事件。请引导我找到正确的解决方案或提供一些有用的链接。