The following structure:

<div id="find_all_children_attributes">
    <div class="child" id="1"></div>
    <div class="child" id="2"></div>
    <div class="child" id="3"></div>
    <div class="child" id="4"></div>
</div>

I managed to get the first one:

let attributes = $('#find_all_children_attributes').find(".child").attr("id");

But how can I get all ids in an array?