serious bug in clickListener (shown.bs.select)

[ARS81]

A "shown.bs.select" event listener is attached INSIDE the button's click handler, so this gets attached again and again, every time the button is clicked.

https://github.com/silviomoreto/bootstrap-select/blob/56e4f886dc909de82db9327329c2bf0711c7df93/js/bootstrap-select.js#L1062

Debug:

      this.$button.on('click', function () {
        that.setSize();
        that.$element.on('shown.bs.select', function () {
          console.log('XXX');

Now start clicking the button several times to open and close the menu and watch the console how many time XXX is printed.

Watching the code I see the event is only removed when the select is required and in invalid state.

[ARS81]

An easy fix could be to use .one() instead of .on() for the the shown.bs.select event or better moving it outside from the click event handler.

[ARS81]