i've tried to add printThis plugin to my laravel project, and it returns

events:2406 Uncaught TypeError: $(...).printThis is not a function

Laravel sees connected js file

And here is my code:

 <script type="text/javascript" src="{{ asset('assets/js/printThis.js') }}"></script>
<script>
$('.myModal_30').printThis();
</script>

it's all ok with class