JsBlock is helps working with js.
The preferred way to install this extension is through composer.
Either run
php composer.phar require --prefer-dist jasurbek94/jsblock "*"
or add
"jasurbek94/jsblock": "*"
to the require section of your composer.json file.
Once the extension is installed, simply use it in your code by :
<?php \jasurbek94\jsblock\JsBlock::begin(); ?>
<script>
your script goes here
</script>
<?php \jasurbek94\jsblock\JsBlock::begin(); ?>