event for show/hide list with options of < select > element

问题

All!!!

What events should be used when showing or hiding the dropdown list of < option >'s of < select > element?

Actions:

1. The user press key (Enter for example) or clicked the cursor on an < select > item and was showed dropdown list of < option >'s

2. The user press key (Esc for example) or select other html element and was hidded dropdown list of < option >'s

   item #1 item #1 item #1

   $('#myselect').on('event_show_dropdrown_list', function(){}); $('#myselect').on('event_hide_dropdrown_list', function(){});

回答1:

focusin() and focusout() jquery methods should do what you are looking for

https://api.jquery.com/focusin/

来源：https://stackoverflow.com/questions/38974201/event-for-show-hide-list-with-options-of-select-element