What this Bootstrap Utility API class does
Set the left property of an element that is positioned either relative, absolute, sticky or fixed.
Example usage & available classes
<div class="position-absolute start-0 top-0"></div>
<div class="position-absolute start-50 top-50"></div>
<div class="position-absolute start-100 bottom-50"></div>
Example override
In the example override below, we are adding the additional class of "start-75" with a value of "75%".
"start": map-merge(
map-get($utilities, "start"),
(
values: map-merge(
map-get(map-get($utilities, "start"), "values"), (
75: 75%
)
)
)
)