Why are classes and events not applied to newly created objects in JS?

Question

JavaScript

A couple of questions.
1. I create a new table from an array through $.eachand .append(). I add , but
the table is still one-color. 2. I add a bootstrap tooltip in one of the elements , but it does not work on hover. Initialized via:<table>.addClass('table-stripped')
data-toggle="tooltip" title="some"

<script>
    $(document).ready(function () {
        $('[data-toggle="popover"]').popover();
    });
    $(function () {
        $('[data-toggle="tooltip"]').tooltip();
    });
</script>

at the end of the page

Answer 1

1. Because striped with one p, for example.
2. because initialization must be done after adding, Andrew is right