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I have an overview (i.e. list with around 150 items). Each of those items has an appropriate "teaser image". When a user is hovering a list item the appropriate teaser image fades in, on mouse out it fades out again.

As I didn't want to add all images into the page on load I am doing that effect with JS and loading the image url I've attached to each html list item as data-attribute, e.g.

//html
<a data-image="{{ asset.getUrl() }}">Item Title</a>

// js
link.addEventListener("mouseover", () => {
  image.setAttribute("src", imageUrl)
})

My problem is that I can't apply an image transform now as the image is not "generated" on page load but on hover only. Is there any way of applying an image transform in such a scenario? (I think I know the answer as the asset is coming from the server via JS and its url and not via rendering on load)

Or would you simply recommend a using a plugin and applying the transform in the CP?

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