Swiper slide dynamic background image

Have a swiper component and want to display dynamic background image for each slide.

Followed syntax from this post: howto/code-editor-cannot-process-and-save-a-style-with-dynamic-background-property/2361

But cannot get it to work and display image. This is formatting based on the example above:

dmx-style:background-image="'url("' + image + '")'"

image is my dynamic value. All my other dynamic values display and work, just not image.