How to tell when a dynamically created element has rendered

Question

I need to accurately measure the dimensions of text within my web app, which I am achieving by creating an element (with relevant CSS classes), setting its innerHTML

Answer 1

when you make for example

var clonedForm = $('#empty_form_to_clone').clone(true)[0];

var newForm = $(clonedForm).html().replace(/__prefix__/g, next_index_id_form);

// next_index_id_form is just a integer 

What am I doing here?
I clone a element already rendered and change the html to be rendered.

Next i append that text to a container.

$('#container_id').append(newForm);

The problem comes when i want to add a event handler to a button inside newForm, WELL, just use ready event.

$(clonedForm).ready(function(event){
   addEventHandlerToFormButton();
})

I hope this help you.

PS: Sorry for my English.