go run main.go --file app.css
Taking a look at this code,
.foo {
text-transform: uppercase;
height: 100px;
width: 100%;
}
and assuming we have bootstrap.css in our project's dependencies, we see that text-transform and width can be replaced with bootstrap's classes text-uppercase
and w-100
so instead of writting extra CSS, you could just do that
<div class="foo text-uppercase w-100">
</div>
Notice that the foo is still used, that's because height: 100px
is not available on bootstrap's css utilities.