center ul bootstrap 4 code example

Example 1: navbar items center

# css
.navbar-expand-lg .navbar-collapse {
display: flex!important;
justify-content: space-around;
flex-basis: auto;
}

Example 2: alighn right boostrap 4

<div class="float-left">Float left on all viewport sizes</div><br>
<div class="float-right">Float right on all viewport sizes</div><br>
<div class="float-none">Don't float on all viewport sizes</div>