Jqueryu problem Mouse move in and out remove default style Toggle style

$(".case-icon li").hover(function(){                
//    $(this).children(".xianshi").eq(0).removeClass("yincang");
//    $(this).children(".aa").eq(0).addClass("yincang");

    $(this).children(".yincang").removeClass("yincang");
    $(this).children(".xianshi").addClass("yincang");
},function(){
//    $(this).children(".yincang").eq(0).removeClass("yincang");
//    $(this).children(".xianshi").eq(0).addClass("yincang");
                
    $(this).children(".aa").addClass("yincang");
    $(this).children(".xianshi").removeClass("yincang");
});

I would like to ask, how do I get rid of the first default style and let it move the mouse into the picture and change the text into the picture and the other into the picture as its content? Move the mouse out the opposite way.

Jquery
Dec.21,2021 
$('.case-icon li').hover(function(){                
  $(this).children().toggleClass('yincang xianshi');
  $(this).siblings().children()
    .eq(0).addClass('xianshi').removeClass('yincang')
    .next().addClass('yincang').removeClass('xianshi');
});

this logic css is sufficient and does not require js 

.case-icon li a:last-child,
.case-icon li:hover a:first-child{
  display: none;
}
.case-icon li:hover a:last-child{
  display: inline;
}

Previous: Jenkins system management error report?

Next: The website made by PHP can be accessed on the PC side, but not on the mobile side.

css mysql arrays josn react html typescript webpack npm sass R objective-c .net sql-server jquery python-3.x angularjs django angular excel regex iphone ajax linux xml pandas vba spring database wordpress string wpf xcode windows bash postgresql oracle multithreading eclipse list firebase algorithm macos forms image scala visual-studio azure bootstrap spring-boot react-native python-2.7 docker performance function winforms matlab powershell apache dataframe api sqlite numpy rest shell selenium flutter dart maven loops qt swing android-studio csv express file class tensorflow sorting codeigniter perl
MySQL Query : SELECT * FROM `codeshelper`.`v9_news` WHERE status=99 AND catid='6' ORDER BY rand() LIMIT 5
MySQL Error : Disk full (/tmp/#sql-temptable-64f5-1e463d1-443da.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1e463d1-443da.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
Need Help?