[Solved]-Getting an error that images is null while trying to show a preview of the uploaded images in react js-Reactjs

With your setImages({ images: imageArray }) call, you'll get value of images const to be:

images = {images: [...]} // [...] is the imageArray

so you'll have to access it as images.images, or rather set it as setImages(imageArray) which will be accessible as you expect.

Also, access the state variable and use map instead of forEach, not the imageArray. So instead of imageArray.forEach(...) use images.map(...). Map returns an array with values returned from the function calls. Whereas forEach returns undefined.