Bootstrap 4: ?? ??? ?? ?? ???? ??
?? ?? ????? Bootstrap 4? ???? ??? ??? ?? ??? ? ?? ?? ???. ?? CSS ? JavaScript ???? ????? ?????.
???? ?? ??? CSS
? CSS? ?? ???? ?? ?? ??? ??? ??? ???.
.dropdown-submenu {
position: relative;
}
.dropdown-submenu a::after {
transform: rotate(-90deg);
position: absolute;
right: 6px;
top: .8em;
}
.dropdown-submenu .dropdown-menu {
top: 0;
left: 100%;
margin-left: .1rem;
margin-right: .1rem;
}
?? ??? JavaScript ??
? JavaScript? ???? ?? ??? ??? ??? ?????.
$('.dropdown-menu a.dropdown-toggle').on('click', function(e) {
if (!$(this).next().hasClass('show')) {
$(this).parents('.dropdown-menu').first().find('.show').removeClass('show');
}
var $subMenu = $(this).next('.dropdown-menu');
$subMenu.toggleClass('show');
$(this).parents('li.nav-item.dropdown.show').on('hidden.bs.dropdown', function(e) {
$('.dropdown-submenu .show').removeClass('show');
});
return false;
});
HTML ??
CSS? JavaScript? ??? ? JavaScript? HTML ??? ??? 3??? ?????. dropdown.
<ul class="navbar-nav">
<li class="nav-item dropdown">
<a class="nav-link dropdown-toggle" href="http://example.com">
??? ??? ?? Bootstrap 4 ??? ??? ?? ? ?? ??? ????? ??? ????? ?? ??? ??? ??? ? ????.
? ??? Bootstrap 4 ???? ?? ?? ????? ??? ?? ? ????? ?? ?????. ??? ??? PHP ??? ????? ?? ?? ??? ?????!
? AI ??
Undress AI Tool
??? ???? ??
Undresser.AI Undress
???? ?? ??? ??? ?? AI ?? ?
AI Clothes Remover
???? ?? ???? ??? AI ?????.
Clothoff.io
AI ? ???
Video Face Swap
??? ??? AI ?? ?? ??? ???? ?? ???? ??? ?? ????!
?? ??
??? ??
???++7.3.1
???? ?? ?? ?? ???
SublimeText3 ??? ??
??? ??, ???? ?? ????.
???? 13.0.1 ???
??? PHP ?? ?? ??
???? CS6
??? ? ?? ??
SublimeText3 Mac ??
? ??? ?? ?? ?????(SublimeText3)
??? ??
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'?? ??? CSS'? ??????
Jun 24, 2025 am 12:42 AM
CSS? ??? ??? ????? ????? ??? ? ?? CSS? ????? ?? ??????, ?? ?? ? ??? ??, ??? ?? ?? ??? CSS ? ????? ?? ??? ?? ???? ???? ??? ??? ???. 1. ?? CSS? ???? HTML? ?? ?????. 2. JavaScript? ?? ??? CSS ??; 3. ??? ??? ???? ?? ???? ????? ??????. 4. CSS? ???? ???? ??? ????. ?? CSS? ???? ?? ??? ???? Rel = "Preload"?????? ????, ??? ?? ??? ????? ???? ??? ?? ? ??? ???? ??? ?????.
?? ? ?? CSS : ?? ?? ??? ??????
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TheBestoproachforcssdspectionseproject'sspecificneeds.forlargerProjects, externalcsSisbetterduetomainabainabainabilitableability ? forsmallerprojectsorsingle-pageapplications, ?? csmightbemoresuitable.it 'scrucialtobalanceprojectsize, ??
? CSS? ???? ???????
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???, cssdoesnothavetobeInlowercase. ???, lowercaseisRecomedended for : 1) ??? ? ??, 2) ??? ?? rorsinerrorsinerrorsIngerRorsIngerRorsInteChnologies, 3) ??? ?? ??, ? 4) ?? ? ???? ????.
CSS ?? ??? : ??? ?? ?????
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cssismostlycase-Insensitive, buturlsandfamilynamesarecase-insensitive.1) propertiesandvalueslikecolor : red; anteOtcase-inditive.2) urlsmustmatchtheserver'scase, ?? ??,/images/logo.png.3) fontfamilynames'opens'mustoccase.
autopRefixer ? ???? ??? ??????
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AutoPrefixer? ?? ???? ??? ???? ?? ?? ???? CSS ??? ???? ???? ?????. 1. ????? ???? ???? ???? ??? ?????. 2. PostCSS ???? ??, CSS? ?? ???? ???? ?? ???? ??? ???? ??? ?? ??? ?????. 3. ?? ???? ???? ??, ??????? ?? ? ?? ???????? ????? ?? ?????. 4. ???? ???? ???? ???? ?? ?? ????, ???? ?? ??? ?? ???? ???? ????? ?? ???? ?? ????.
CSS ??? ? ??????
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CSSCOUNTERSCANAUTOMALLYNUMBERSESSESSENDS.1) USECOUNTER-RESETTIONITIALIZE, CORKENT-INCREMENTTOINCERES, andCOUNTER () ORCOUNTERS () TODISPLAYVALUES.2) COMPINEWITHJAVAISCRIPTORDINAMICCONTENTTOEREACCUTERUPDATES.
CSS : Case Case? ?? ???? ?????
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CSS?? ??? ? ?? ??? ?? ??? ???? ??, ??, URL ? ??? ?? ????? ?? ?? ??? ?????. 1. ???? ?? ??? ??? ? ???? ?? ?? ??? ??????. 2. ?? 16 ?? ??? ?? ??? ?????, ??? ???? ???? ?? ??? ??? ???? ????. 3. URL? ??? ???? ???? ??? ??? ? ????. 4. ??? ?? ?? (??)? ??? ???? ??? ? ???? ??????? ???????.
CSS? ?? ??? : ???, ?? ? ?? ???????
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cssselectorsandpropertynamesarecase-inensensitive, whilevaluescanbecase-sensitivendependingOntext.1) selectorsike'div'and'div'areequivalent.2) propertiessuchas'background'and'background-color'AretreatedThesame.3) ValueLikecolornames-insens
