i have add some images in the this file assets/backgrounds , so when i want to add them to some styledDiv , i use background-image: url(assets/backgrounds/${randomImage}.jpg); but the image is not available in url

so i try to import the image and try like this import imag from 'assets/backgrounds/3.jpg'; and the console.log(imag) the result is this /static/media/3.c49045ad.jpg and what is this mean , what im doing wrong ?