virgofx/jquery-flexselect — comment on commit 0691ed96bfc4e544f25799e3ef416dbce143c396
File:  line 0
By virgofx:

Just a note that would be nice if the API/usage/implementation is updated for FlexSelect ...

I would recommend having all existing elements that are to be transformed be laid out with a hidden visibility directly. The reason is there exists a slight jump as the SELECT element is removed and replaced by the INPUT. In the case where no default value is selected and the select element has values this causes a jitter and you can see the first element of the select (briefly).