CSS Sprite Sheet using multiple backgrounds - html

Question

I'm using a CSS Sprite Sheet technology and have a problem with multiple backgrounds.
In this website - https://www.w3schools.com/css/tryit.asp?filename=trycss_sprites_img you can see how to set a background from a sprite sheet but my case is a bit different.
Simple code:
#nav1 {
background: url(https://n3olukas.000webhostapp.com/images/nav-icons.png) -165px -19px no-repeat, url(https://n3olukas.000webhostapp.com/images/x3_1.png) no-repeat;
width: auto;
height: 40px;
background-size: 319px 349px, auto;
}
<div id="nav1"></div>
And the problem is I don't want to show these 2 icons. I want to show only the first one:
How could I make it? I've tried height and width properties but I think it's not for multiple backgrounds.

Answer 1

It is not possible to crop each image in a multiple-background setting separately. So if you want to keep the yellow bar, but only show one icon on it, consider using a pseudo-element, or an actual DOM element reserved to displaying single icons. E.g. here with an <i>:
#nav1 {
background: url(https://n3olukas.000webhostapp.com/images/x3_1.png) no-repeat;
background-size: auto;
height: 40px;
width: auto;
}
i.icon1 {
background: url(https://n3olukas.000webhostapp.com/images/nav-icons.png) -165px -19px no-repeat;
background-size: 319px 349px;
display: inline-block;
height: 40px;
width: 40px;
}
<div id="nav1"><i class="icon1"></i></div>
If you want to make sure it stays in the background, use z-index. If you want to make sure it doesn't interfere with the content of #nav1, use position: absolute; top: 0; left: 0 as well.

Answer 2

You would have to specify a width.
#nav1 {
background: url(https://n3olukas.000webhostapp.com/images/nav-icons.png) -165px -19px no-repeat;
width: 40px;
height: 40px;
background-size: 319px 349px, auto;
position: relative;
}
#nav1:after {
content: "";
background: url(https://n3olukas.000webhostapp.com/images/x3_1.png) no-repeat;
width: 232px;
height: 40px;
position: absolute;
z-index: -1;
}
<div id="nav1"></div>