javascript - jQuery slidedown menu trigger makes menu slideup too quickly -

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i have following html: 

     <div class="col-sm-12" id='dropdown_menu_group'>         <div id='dropdown_library_menu'>             <div class="row" id='dropdown_menu_row'>                 <div class="col-sm-2">                     <a class='button-text btn' id='library_button' href="{{pathfor 'library'}}">my library</a>                 </div>                 <div class='col-sm-2 col-sm-pull-1' id='google_drive_text'>                     google drive                 </div>                 <div class="col-sm-2" id='settings_button'></div>             </div>         </div>         <div id='dropdown_library_menu_border'></div>     </div>

my id='dropdown_library_menu' hidden default, , div below <div id='dropdown_library_menu_border'></div> has opacity of 0, when scrolled over, makes id='dropdown_library_menu' slide down. issue is, though, <div id='dropdown_library_menu_border'></div> still there when menu slides down, , thus, when scroll on opacity 0 div triggers slidedown (inside of menu, @ point), tricks jquery thinking condition met:

'mouseout #dropdown_library_menu': function(ev){     ev.preventdefault();     $('#dropdown_library_menu').slideup('slow'); }

because technically, mousing out of dropdown menu , dropdown menu trigger.

i want make blank div move bottom of menu when slidedown triggered, setting position relative on parent , position absolute on children totally messes webpage.

you can make slower,

'mouseout #dropdown_library_menu': function(ev){  ev.preventdefault();  $('#dropdown_library_menu').slideup(3000); // slide in 3 seconds,  }

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