Why does Slidesjs add spaces and truncate the image when sizing is implicit?

Question

JavaScript

Hello! Who used this slidesjs.com
slider Tell me why it behaves so strangely. To be clear. For example, a picture of 900x500 px
If you specify exactly such dimensions in the slider, everything is buzzing!
And if you do not specify the dimensions, or do not specify the width, it adds its indent from below to the navigation buttons.
And vice versa, if you specify a size, for example, the width is greater than the image, then it sort of cuts the photo in height.
If anyone has worked with this slider, you may know the way out. It is necessary that it adapts to the size of the image without specifying dimensions.