Magento 2 Product Image doesn't load quickly on hover of swatches images

[akshaykamba454]

Product Image doesn't load quickly on hover or click of swatch image

Product Image size above 300kb

[Bhanu Periwal]

Hi @akshaykamba454 

Here's a simple solution that will cause the product's base image to be displayed while the JS is loading. Create the following file in your theme:

{theme_dir}/Magento_Catalog/templates/product/view/gallery.phtml

and add below code:

<div class="gallery-placeholder _block-content-loading" data-gallery-role="gallery-placeholder">
    <div data-role="loader" class="loading-mask">
        <div class="loader">

            <img src="<?php echo $block->getGalleryImages()->getFirstItem()->getData('medium_image_url') ?>" style="max-width: 100%; max-height: 100%">

            <img src="<?php /* @escapeNotVerified */ echo $block->getViewFileUrl('images/loader-1.gif'); ?>"
                 alt="<?php /* @escapeNotVerified */ echo __('Loading...') ?>">
        </div>
    </div>
</div>
<!--Fix for jumping content. Loader must be the same size as gallery.-->
<script>
    var config = {
            "width": <?php /* @escapeNotVerified */ echo $block->getImageAttribute('product_page_image_medium', 'width'); ?>,
            "thumbheight": <?php /* @escapeNotVerified */ echo $block->getImageAttribute('product_page_image_small', 'height')
                        ?: $block->getImageAttribute('product_page_image_small', 'width'); ?>,
            "navtype": "<?php /* @escapeNotVerified */  echo $block->getVar("gallery/navtype"); ?>",
            "height": <?php /* @escapeNotVerified */ echo $block->getImageAttribute('product_page_image_medium', 'height'); ?>
        },
        thumbBarHeight = 0,
        loader = document.querySelectorAll('[data-gallery-role="gallery-placeholder"] [data-role="loader"]')[0];

    if (config.navtype === 'horizontal') {
        thumbBarHeight = config.thumbheight;
    }

    loader.style.paddingBottom = ( config.height / config.width * 100) + "%";
</script>
<script type="text/x-magento-init">
    {
        "[data-gallery-role=gallery-placeholder]": {
            "mage/gallery/gallery": {
                "mixins":["magnifier/magnify"],
                "magnifierOpts": <?php /* @escapeNotVerified */ echo $block->getMagnifier(); ?>,
                "data": <?php /* @escapeNotVerified */ echo $block->getGalleryImagesJson(); ?>,
                "options": {
                    "nav": "<?php /* @escapeNotVerified */ echo $block->getVar("gallery/nav"); ?>",
                    <?php if (($block->getVar("gallery/loop"))): ?>
                        "loop": <?php /* @escapeNotVerified */ echo $block->getVar("gallery/loop"); ?>,
                    <?php endif; ?>
                    <?php if (($block->getVar("gallery/keyboard"))): ?>
                        "keyboard": <?php /* @escapeNotVerified */ echo $block->getVar("gallery/keyboard"); ?>,
                    <?php endif; ?>
                    <?php if (($block->getVar("gallery/arrows"))): ?>
                        "arrows": <?php /* @escapeNotVerified */ echo $block->getVar("gallery/arrows"); ?>,
                    <?php endif; ?>
                    <?php if (($block->getVar("gallery/allowfullscreen"))): ?>
                        "allowfullscreen": <?php /* @escapeNotVerified */ echo $block->getVar("gallery/allowfullscreen"); ?>,
                    <?php endif; ?>
                    <?php if (($block->getVar("gallery/caption"))): ?>
                        "showCaption": <?php /* @escapeNotVerified */ echo $block->getVar("gallery/caption"); ?>,
                    <?php endif; ?>
                    "width": "<?php /* @escapeNotVerified */ echo $block->getImageAttribute('product_page_image_medium', 'width'); ?>",
                    "thumbwidth": "<?php /* @escapeNotVerified */ echo $block->getImageAttribute('product_page_image_small', 'width'); ?>",
                    <?php if ($block->getImageAttribute('product_page_image_small', 'height') || $block->getImageAttribute('product_page_image_small', 'width')): ?>
                        "thumbheight": <?php /* @escapeNotVerified */ echo $block->getImageAttribute('product_page_image_small', 'height')
                        ?: $block->getImageAttribute('product_page_image_small', 'width'); ?>,
                    <?php endif; ?>
                    <?php if ($block->getImageAttribute('product_page_image_medium', 'height') || $block->getImageAttribute('product_page_image_medium', 'width')): ?>
                        "height": <?php /* @escapeNotVerified */ echo $block->getImageAttribute('product_page_image_medium', 'height')
                        ?: $block->getImageAttribute('product_page_image_medium', 'width'); ?>,
                    <?php endif; ?>
                    <?php if ($block->getVar("gallery/transition/duration")): ?>
                        "transitionduration": <?php /* @escapeNotVerified */  echo $block->getVar("gallery/transition/duration"); ?>,
                    <?php endif; ?>
                    "transition": "<?php /* @escapeNotVerified */  echo $block->getVar("gallery/transition/effect"); ?>",
                    <?php if (($block->getVar("gallery/navarrows"))): ?>
                        "navarrows": <?php /* @escapeNotVerified */  echo $block->getVar("gallery/navarrows"); ?>,
                    <?php endif; ?>
                    "navtype": "<?php /* @escapeNotVerified */  echo $block->getVar("gallery/navtype"); ?>",
                    "navdir": "<?php /* @escapeNotVerified */  echo $block->getVar("gallery/navdir"); ?>"
                },
                "fullscreen": {
                    "nav": "<?php /* @escapeNotVerified */  echo $block->getVar("gallery/fullscreen/nav"); ?>",
                    <?php if ($block->getVar("gallery/fullscreen/loop")): ?>
                        "loop": <?php /* @escapeNotVerified */  echo $block->getVar("gallery/fullscreen/loop"); ?>,
                    <?php endif; ?>
                    "navdir": "<?php /* @escapeNotVerified */  echo $block->getVar("gallery/fullscreen/navdir"); ?>",
                    <?php if ($block->getVar("gallery/transition/navarrows")): ?>
                        "navarrows": <?php /* @escapeNotVerified */  echo $block->getVar("gallery/fullscreen/navarrows"); ?>,
                    <?php endif; ?>
                    "navtype": "<?php /* @escapeNotVerified */  echo $block->getVar("gallery/fullscreen/navtype"); ?>",
                    <?php if ($block->getVar("gallery/fullscreen/arrows")): ?>
                        "arrows": <?php /* @escapeNotVerified */  echo $block->getVar("gallery/fullscreen/arrows"); ?>,
                    <?php endif; ?>
                    <?php if ($block->getVar("gallery/fullscreen/caption")): ?>
                        "showCaption": <?php /* @escapeNotVerified */  echo $block->getVar("gallery/fullscreen/caption"); ?>,
                    <?php endif; ?>
                    <?php if ($block->getVar("gallery/fullscreen/transition/duration")): ?>
                        "transitionduration": <?php /* @escapeNotVerified */  echo $block->getVar("gallery/fullscreen/transition/duration"); ?>,
                    <?php endif; ?>
                    "transition": "<?php /* @escapeNotVerified */  echo $block->getVar("gallery/fullscreen/transition/effect"); ?>"
                },
                "breakpoints": <?php /* @escapeNotVerified */ echo $block->getBreakpoints(); ?>
            }
        }
    }
</script>

Run below command:

php bin/magent setup:static-content:deploy 
php bin/magento cache:flush
sudo chmod -R 777 var/ pub/ generated/

Hope this will help you.

If issue resolve, please click on 'Kudos' & Accept as Solution!

[akshaykamba454]

@Bhanu Periwal  Thanks for the reply 

I checked above but still the same problem. I have an extension amasty color swatches pro added. On swatch hover, the product image doesn't load fully

but after the page refreshes its work.

[smita_kagwade]

Hello @akshaykamba454 ,

    can you  please check if you have any console error On swatch hover?

Thank you

[akshaykamba454]

@smita_kagwade  Thanks for Reply

No error in console on swatches hover