Magento – Add vertical slider to product page (view more images)

I found what was wrong, some strange peace of code in the js file, that was causing jquery not to load properly. Once I have removed the .hammer() which was located just before the function name. Everything went back to normal.

You can configure slider in view.xml file. It located in /theme_folder/etc/view.xml. There you can write vars for gallery. For luma theme it looks like this

<vars module="Magento_Catalog">

    <!-- Gallery and magnifier theme settings. Start -->
    <var name="gallery">
        <var name="nav">thumbs</var> <!-- Gallery navigation style (false/thumbs/dots) -->
        <var name="loop">true</var> <!-- Gallery navigation loop (true/false) -->
        <var name="keyboard">true</var> <!-- Turn on/off keyboard arrows navigation (true/false) -->
        <var name="arrows">true</var> <!-- Turn on/off arrows on the sides preview (true/false) -->
        <var name="caption">false</var> <!-- Display alt text as image title (true/false) -->
        <var name="allowfullscreen">true</var> <!-- Turn on/off fullscreen (true/false) -->
        <var name="navdir">horizontal</var> <!-- Sliding direction of thumbnails (horizontal/vertical) -->
        <var name="navarrows">true</var> <!-- Turn on/off on the thumbs navigation sides (true/false) -->
        <var name="navtype">slides</var> <!-- Sliding type of thumbnails (slides/thumbs) -->
        <var name="transition">
            <var name="effect">slide</var> <!-- Sets transition effect for slides changing (slide/crossfade/dissolve) -->
            <var name="duration">500</var> <!-- Sets transition duration in ms -->
        </var>
        <var name="fullscreen">
            <var name="nav">thumbs</var> <!-- Fullscreen navigation style (false/thumbs/dots) -->
            <var name="loop">true</var> <!-- Fullscreen navigation loop (true/false/null) -->
            <var name="keyboard">true</var> <!-- Turn on/off keyboard arrows navigation (true/false/null) -->
            <var name="arrows">false</var> <!-- Turn on/off arrows on the sides preview (true/false/null) -->
            <var name="caption">false</var> <!-- Display alt text as image title (true/false) -->
            <var name="navdir">horizontal</var> <!--Sliding direction of thumbnails in full screen(horizontal/vertical)  -->
            <var name="thumbwidth">150</var> <!-- Width of thumbnails in fullscreen -->
            <var name="thumbheight">150</var> <!-- Height of thumbnails in fullscreen -->
            <var name="navigation_carousel">true</var> <!-- Display navigation thumbs as carousel (true/false) -->
            <var name="transition">
                <var name="effect">dissolve</var> <!-- Sets transition effect for slides changing (slide/crossfade/dissolve) -->
                <var name="duration">500</var> <!-- Sets transition duration in ms -->
                <var name="carousel">true</var> <!-- Display navigation thumbs as carousel (true/false) -->
            </var>
        </var>
    </var>

Hope this help