javascript——找出为什么特定的CSS没有按预期应用
相关标签： # 前端
我正在为我的一个网站做第二个主题（黑暗主题）&；我不明白为什么一个特定的CSS位没有被应用到一个特定的元素上，即使它被应用到另一个相同的元素上。
网站的URL:https://phpstack-726541-2423367.cloudwaysapps.com/切换右上角的开关以启用黑暗主题。您可以看到，它只将其应用于“Header”&；不是“Footer”，尽管可以通过Inspect元素看到它们都使用相同的类。
document.querySelector('.switch').addEventListener('click', () => {
document.body.classList.toggle('light');
document.querySelector('.navbar').classList.toggle('light');
document.querySelector('button').classList.toggle('light');
document.querySelector('#menu-btn').classList.toggle('light');
document.querySelector('.wve-editor-player').classList.toggle('light');
});/* video editor */
body { padding: 90px 0; background-color: #101010;}
@media screen and (max-width: 568px) {
body { padding: 0; }
body > .container { margin: 0; padding: 0; }
body > .container > .card { border: 0; border-radius: 0; background-color: transparent !important;}
}
.navbar { background-color: #191919; height: 89px; border-bottom: solid 1px #414040; box-shadow: 1px 1px #414040;}
.big { font-size: 120%; }
.small { font-size: 80%; }
.code { max-height: 500px; padding: 5px; overflow: auto; background-color: #eee; }
.btn[disabled] { cursor: not-allowed; color: #fff; background-color: #6c757d; border-color: #6c757d; }
.shadow-1 { box-shadow: 0 0 10px rgba(0,0,0,0.5); }
video,
audio { width: 100%; box-sizing: content-box; }
/* logo */
.logo { color: #0099FF; font-size: 20px; }
.logo img { width: auto; max-width: 200px; margin: -69px; margin-top: -6.9%; padding-left: 50px;}
.logo a { text-decoration: none; }
/* colors */
.bg-white { background-color: #fff; }
.color-blue { color: #236bf1; }
.color-red { color: #f13d2a; }
/* common */
.no-margin { margin: 0 !important; }
.no-wrap { white-space: nowrap; }
.show-on-hover-parent { position: relative; }
.show-on-hover { position: absolute; top: 10px; right: 10px; display: none; }
.show-on-hover-parent:hover .show-on-hover { display: block; }
.card-default { background-color: #F5F5F5; }
.display-inline-block { display: inline-block; }
.btn { cursor: pointer; border-radius: 6EM; border: solid 1px #0099FF;}
.btn:hover { background-color: #CCC; color: #000;}
#import-bttn {background-color: #0099FF; color: #FFF !important;}
.text-ellipsis { display: block; text-align: left; max-width: 100%; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.max-height300 { max-height: 300px; overflow: auto; }
.relative { position: relative; }
.position-absolute { position: absolute; }
.pos-absolute-left { left: 15px; top: 15px; }
.pos-absolute-right { right: 15px; top: 15px; }
.pos-absolute-bottom-left { left: 15px; bottom: 15px; }
/* login */
.card-login { margin-top: 150px; }
.card-login form { margin-bottom: 0; }
/* margins */
.margin-top { margin-top: 1rem; }
.margin-bottom { margin-bottom: 1rem; }
.margin-vert { margin-top: 1rem; margin-bottom: 1rem; }
@media screen and (max-width: 768px) {
.margin-bottom-md { margin-bottom: 1rem; }
}
/* button */
/* .btn {background-color: #161616;} */
.btn:not(.btn-link) { transition: box-shadow 0.3s ease; }
.btn:not(.btn-link):hover { box-shadow: 0 0 10px rgba(0,0,0,0.3); }
.btn[class*="-outline"] { transition: background-color 0.3s ease; background-color: #0099FF; border: solid 1px #101010; color: #FFF !important;}
.btn-icon [class^="icon-"] { line-height: 1.4rem; }
.btn-smp { padding: 0.6rem 1.5rem; }
.btn-outline-info { border-color:#CCC; color: #9E9E9E !important;}
.control-buttons {padding: 0 13px; font-size: 13px; line-height: 36px; margin: 0px 6px; float: right;}
#editor-controls {margin-top: 40px;}
/* form fields */
.form-control[type="text"],
.form-control[type="email"],
.form-control[type="number"],
.form-control[type="password"],
textarea.form-control { background-color: #f1f1f1; box-shadow: inset 0 0 5px rgba(0,0,0,0.1); }
textarea.form-control:focus { background-color: #f1f1f1; }
input[type="range"] { width: 100%; padding: 0; }
.input-range { padding: 7px; border: 1px solid #ddd; border-radius: 4px; }
/* dropdown-menu */
.dropdown-menu { box-shadow: 0 0 10px rgba(0,0,0,0.3); }
/* editor-player */
.wve-editor-player { position: relative; background-color: #161515; border:solid 1px #404040; border-radius: 6px;}
.wve-editor-player video { width: 100%; height: 360px; border-radius: 6px;}
.wve-editor-player-panel { position: absolute; left: 0; bottom: 0; width: 100%; padding: 5px 20px; background-color: rgba(0,0,0,0.5); color: rgba(255,255,255,0.7); opacity: 1; transition: opacity 300ms; }
.wve-editor-player .time { float: right; }
.wve-editor-player .time-current { float: left; }
.wve-editor-player:hover .wve-editor-player-panel { opacity: 0; }
/* list-group */
.list-group { }
.list-group .list-group-item.active .btn-link { color: #fff; }
.list-group .list-group-item .btn-link { max-width: 100%; padding: 0; overflow: hidden; text-overflow: ellipsis; border: none;}
.list-group-item a,
.list-group-item .btn-link { text-decoration: none; }
span.btn.btn-link:hover { background: none; }
/* editor-timeline */
.editor-timeline-wrapper { position: relative; }
#wve-timeline { position: relative; width: 100%; height: 20px; z-index: 11; overflow: hidden; background: none transparent; border: 0; }
#wve-timeline .ui-slider-handle { z-index: 12; width: 12px; height: 20px; top: 0; margin-left: -6px; margin-top: 0; background: none transparent; border: 0; outline: none; }
#wve-timeline .ui-slider-handle:before { content: ''; display: block; position: absolute; top: 0; left: 50%; margin-left: -5px; width: 0; height: 0; border-style: solid; border-width: 6px 5px 0 5px; border-color: #000000 transparent transparent transparent; }
#wve-timeline .ui-slider-handle:after { content: ''; display: block; position: absolute; bottom: 0; left: 50%; margin-left: -5px; width: 0; height: 0; border-style: solid; border-width: 0 5px 6px 5px; border-color: transparent transparent #000000 transparent; }
#wve-timeline-range { position: absolute; left: 0; top: 0; width: 100%; height: 20px; z-index: 12; border: 1px solid rgba(0,0,0,0.2); background: none #eee; border-radius: 0; box-shadow: none !important; }
#wve-timeline-range .noUi-connect { background: none #aaa; }
.noUi-horizontal .noUi-origin { z-index: 10 !important; }
.noUi-horizontal .noUi-connects:first-child + .noUi-origin { z-index: 5 !important; }
.noUi-horizontal .noUi-handle.noUi-handle-lower { height: 20px; border: 0; top: -1px !important; background: none transparent; box-shadow: none; }
.noUi-horizontal .noUi-handle.noUi-handle-lower:before { content: ''; display: block; position: absolute; top: 0; left: 50%; margin-left: -5px; width: 0; height: 0; border-style: solid; border-width: 6px 5px 0 5px; border-color: #000000 transparent transparent transparent; background-color: transparent; }
.noUi-horizontal .noUi-handle.noUi-handle-lower:after { content: ''; display: block; position: absolute; bottom: 0; top: auto; left: 50%; margin-left: -5px; width: 0; height: 0; border-style: solid; border-width: 0 5px 6px 5px; border-color: transparent transparent #000000 transparent; background-color: transparent; }
/* btn-group-justified */
.btn-group-justified { display: flex; width: 100%; }
.btn-group-justified .btn,
.btn-group-justified .btn-group { flex: 1; }
.btn-group-justified .btn { width: 100%; }
/* progress bar */
.progress { border: none; }
#wve-user-stat {display: none;}
/* preloader */
.wve-preloader { position: fixed; top: 0; right: 0; bottom: 0; left: 0; z-index: 1111; background-color: rgba(0,0,0,0.5); }
.wve-preloader-inner { position: absolute; top: 50%; left: 50%; margin: -70px 0 0 -150px; width: 300px; max-width: 100%; z-index: 1112; padding: 15px; background-color: #fff; border-radius: 6px; }
.wve-preloader-caption { padding: 0 0 15px 0; text-align: center; }
.wve-preloader-content { height: 20px; background: url("../img/preloader.gif") center center no-repeat; }
.wve-preloader-progress { }
.wve-preloader-progress .progress { border: 1px solid #b1b1b1; }
.wve-preloader-progress .progress-bar { width: 0; height: auto; overflow: hidden; padding: 2px 0 0 0; }
.wve-preloader-progress .progress-bar-empty { padding-top: 20px; }
/* bottom-list-container */
.bottom-list-container { max-height: 338px; overflow: auto; }
.bottom-list-container td { min-width: 150px; }
/* episode-item */
.wve-episode-container { margin: 0; padding: 0; }
.episode-item { float: left; margin-top: 15px; padding: 15px 5px; }
.episode-item > .card { border-color: rgba(0,0,0,.7); background: url("../img/preloader_circle.gif") no-repeat center center transparent; opacity: 1; overflow: hidden; }
.episode-item .card-block { min-height: 80px; background: none no-repeat center center transparent; background-size: cover; }
.episode-item > .card:hover { background-image: none; }
.episode-item > .card:hover .card-block { opacity: 0.3; }
#wve-episode-container {padding: 0px 55px 0px 55px;}
/* video-thumbnail */
.video-thumbnail { min-height: 150px; background: #eee url("../img/icon_film.png") center center no-repeat; }
/* wve-time-selected-inputs */
#wve-time-selected-inputs { width: 340px; position: absolute; left: 0; top: -56px; display: none; }
#wve-time-selected-inputs .card-block { background-color: #b6b6b6; }
#wve-time-selected-inputs .card-block input.form-control { background-color: #a5a5a5; color: #fff; }
#wve-time-selected-inputs .card-block input.form-control:focus,
#wve-time-selected-inputs .card-block input.form-control:active { border-color: #6f6f6f; }
.card { border: none; background-color: transparent;}
.form-group { margin-top: 16px; margin-bottom: 1rem; }
#footer { background-color: #FFF; border-top: solid 1px #CCC; box-shadow: 1px 1px 1px 1px#ececec; display: none; }
#footer-padding { padding: 10px 9px 9px 40px; }
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-thumb { background-color: #0099FF; width: 6px; border-radius: 6px; }
/* light theme css */
body.light { background-color: #F9F9F9; }
div.navbar.light { background-color: #FFF; border-bottom: solid 1px #CCC; box-shadow: 1px 1px #ececec}
button.btn.light { background-color: #FFF; background-color: #FFF; color: #909090 !important; border: solid 1px #CCC;}
div.wve-editor-player.light { background-color: #DDD; border: 1px solid #DDD;}
图像也包含了所需的结果。感谢您提前提供的任何意见或建议！
形象
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