HTML Dropdown Menu Remove White Space Between LI Element

I'm using image as dropdownlist items and found that there are unnecessary white space in between each of the element and hence wondering if it's possible to remove all of the whit

Solution 1:

 <style>
    li{
        display: block;
        border: 0px;
    }
</style>

add this style hope it will work

Solution 2:

It's hard to tell without jsfiddle but I would add display:block; to images in li..