[Vuejs]-Why component disappear when i change tab?

Considering general file structure 'public>js>app.js', app.js
which include all compiled js, the vue dependencies and attach vue instance to to
the body of the page, your blade, eg index.blade.php you might have something like ::

<script type="text/javascript" src="js/app.js"></script>

In your blade template, change it into something like this, considering same file structure:

<script type="text/javascript" src="{{url('js')}}/app.js"></script>