Bootstrap 4 dynamic tooltip with custom class

I create a dynamic tootltip on target element in the following way :

var dynamicTooltip = new bootstrap.Tooltip($(targetElement));

Everything work just fine, but i would like to add to the generated tooltip a custom class.
Is not clear to me how can i target to the html generated by bootstrap with the previous instruction (or better which bootstrap API should i use to attach a class).
I see that bootstrap tooltip have a class named "tooltip" but i can’t use that class to find my newly generated element eg :

$(".tooltip")

In fact i am afraid that the code above will find also already existing tooltip, and i want target only the newly generated one.

How can i achieve that?

>Solution :

From bootstrap docs:

Here

You can use the template option to give complex HTML structure, or just the customClass option to add custom classes:

var dynamicTooltip = new bootstrap.Tooltip($(targetElement), {
    customClass: 'myCustomClass'
});