How to correctly write the path to the image in yii2?

Question

Yii

At the end of the template page in layouts I have a script

$('.parallax-window').parallax({imageSrc: '/img/bg.jpg'});

How to specify path to @web/img file?

Answer 1

$('.parallax-window').parallax({
    imageSrc: <?=\yii\helpers\Url::toRoute(['/img/bg.jpg']);?>
});