How to update part of the content in Yii2 using JavaScripit and Pjax

The first thing we need to do is include "Pjax" itself:

use yiiwidgetsPjax;

Next, wrap the desired content in the Pjax widget. For example:

<?php Pjax::begin([ 'id' => 'pjaxContent'
]); ?>

Content here

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

And to forcefully reload the desired content, run the following JavaScript code:

$.pjax.reload({container: '#pjaxContent'});

Don’t forget that the jQuery framework must be included (in Yii, it comes by default).

Or bind the reload to an event:

$(document).on('click', '#myBtn', function (e) {
	e.preventDefault();

	$.pjax.reload({container: '#pjaxContent'});

	return false;
});