我试图在任何滚动之前在页面顶部制作导航栏，以便在切换导航菜单时将背景颜色从透明变为白色。我已经尝试添加类.whitenavbar和jQuery（/ 导航栏切换颜色 /），但它不起作用，现在阻止菜单切换？
感谢任何帮助！
https://jsfiddle.net/43taovan/
CSS：
happy-dog的jQuery
.navigation{
width:100%;
background: #fff;
padding-top: 40px;
padding-bottom: 40px;
}
.navlist {
display: inline-block;
}
.navlist:after {
content: '';
display: block;
height: 1.5px;
width: 0;
background: transparent;
transition: width .5s ease, background-color .5s ease;
}
.navlist:hover:after {
width: 100%;
background: grey;
}
/*----/----navlist*/
/*global styles*/
body {
width: 100%;
margin: 0;
list-style: none;
text-decoration: none;
font-size:1.05em;
font-family: Helvetica Neue, Helvetica, Arial, Sans-serif;
}
a {
appearance: none;
font-size:1.05em;
font-family: Helvetica Neue, Helvetica, Arial, Sans-serif;
background:transparent;
color: grey;
border:none;
letter-spacing:0.15em;
text-transform:uppercase;
transition: color 0.5s ease;
list-style: none;
text-decoration: none;
}
/*----/----global styles*/
/*navigation icon*/
#toggle-menu {
float:right;
display: block;
width: 15px;
height: 15px;
padding: 20px;
}
#toggle-menu div {
width: 15px;
height: 15px;
position: relative;
}
.header #toggle-menu span {
display: block;
width: 15px;
height: 3px;
position: absolute;
-webkit-transition: -webkit-transform 0.2s ease-in-out, top 0.2s ease-in-out 0.2s, opacity 0.2s ease-in-out 0.2s;
-moz-transition: -moz-transform 0.2s ease-in-out, top 0.2s ease-in-out 0.2s, opacity 0.2s ease-in-out 0.2s;
transition: transform 0.2s ease-in-out, top 0.2s ease-in-out 0.2s, opacity 0.2s ease-in-out 0.2s;
-webkit-transform-origin: center;
-moz-transform-origin: center;
transform-origin: center;
}
#toggle-menu span.top {
top: 0px;
}
#toggle-menu span.middle {
top: 6px;
}
#toggle-menu span.bottom {
top: 12px;
}
/*----/----navigation icon*/
/*navigation background transition*/
.bg {
background-color: #fff !important;
border-bottom: 0.5px solid rgba(0, 0, 0, 0.2);
}
.show {
opacity: 1;
}
.navfade {
-webkit-transition: all 1s ease-in-out;
-moz-transition: all 1s ease-in-out;
-o-transition: all 1s ease-in-out;
transition: all 1s ease-in-out;
}
.header .logo { /* Before scroll */
color: white;
}
.bg .logo { /* After scroll */
color: #545454;
}
.navinstagram {
fill: #fff
}
.bg .navinstagram{
fill: #545454;
}
#toggle-menu span{
background: #fff;
}
.bg #toggle-menu span {
background: #545454;
}
.whitenavbar {
background: #fff;
}
/*----/----navigation background transition*/
/*navigation icon animation*/
#toggle-menu.menu-is-active span {
-webkit-transition: -webkit-transform 0.2s ease-in-out 0.2s, top 0.2s ease-in-out, opacity 0.2s ease-in-out;
-moz-transition: -moz-transform 0.2s ease-in-out 0.2s, top 0.2s ease-in-out, opacity 0.2s ease-in-out;
transition: transform 0.2s ease-in-out 0.2s, top 0.2s ease-in-out, opacity 0.2s ease-in-out;
}
#toggle-menu.menu-is-active span.top, #toggle-menu.menu-is-active span.middle {
top: 6px;
-webkit-transform: rotate(45deg);
-moz-transform: rotate(45deg);
transform: rotate(45deg);
}
#toggle-menu.menu-is-active span.middle {
opacity: 0;
}
#toggle-menu.menu-is-active span.bottom {
top: 6px;
-webkit-transform: rotate(-45deg);
-moz-transform: rotate(-45deg);
transform: rotate(-45deg);
}
/*----/----navigation icon animation*/
/*Nav Bar*/
.header {
/*border-bottom: 0.5px solid rgba(0,0,0,.2);*/
width: 100%;
position: fixed;
top: 0;
left: 0;
z-index: 99999;
background-color: rgb(184, 184, 184);
/*background: none;*/
}
.nav {
display: none;
list-style-type: none;
position: fixed;
width: 100%;
text-align: center;
left:0;
top: 55px;
border-bottom: 0.5px solid rgba(0, 0, 0, .2);
border-top: 0.5px solid rgba(0, 0, 0, .2);
cursor: pointer;
color: #545454;
font-size:.8em;
letter-spacing:0.05em;
}
.nav li {
padding-left: 30px;
padding-right: 30px;
background: #fff;
margin-top: 50px;
margin-bottom: 50px;
}
.seemore {
display: inline-block;
padding-right: 20px;
}
#navpromo {
border-top: 0.5px solid rgba(0, 0, 0, .2);
padding-bottom: 10px;
background: #ffffff;
}
.instbtn-cont {
display: inline-block;
text-align: center;
margin-top: 10px;
padding-bottom: 30px;
}
.instbtn-cont .instbtn {
position: relative;
padding: 15px 20px;
border: 1px solid grey;
color: grey;
-webkit-font-smoothing: antialiased;
}
.instbtn-cont .instbtn:hover {
border: none;
}
.instbtn-cont .instbtn:hover .line-1 {
-webkit-animation: move1 1500ms infinite ease;
animation: move1 1500ms infinite ease;
}
.instbtn-cont .instbtn:hover .line-2 {
-webkit-animation: move2 1500ms infinite ease;
animation: move2 1500ms infinite ease;
}
.instbtn-cont .instbtn:hover .line-3 {
-webkit-animation: move3 1500ms infinite ease;
animation: move3 1500ms infinite ease;
}
.instbtn-cont .instbtn:hover .line-4 {
-webkit-animation: move4 1500ms infinite ease;
animation: move4 1500ms infinite ease;
}
.instbtn-cont .line-1 {
content: "";
display: block;
position: absolute;
width: 1px;
background-color: grey;
left: 0;
bottom: 0;
}
.instbtn-cont .line-2 {
content: "";
display: block;
position: absolute;
height: 1px;
background-color: grey;
left: 0;
top: 0;
}
.instbtn-cont .line-3 {
content: "";
display: block;
position: absolute;
width: 1px;
background-color: grey;
right: 0;
top: 0;
}
.instbtn-cont .line-4 {
content: "";
display: block;
position: absolute;
height: 1px;
background-color: grey;
right: 0;
bottom: 0;
}
@-webkit-keyframes move1 {
0% {
height: 100%;
bottom: 0;
}
54% {
height: 0;
bottom: 100%;
}
55% {
height: 0;
bottom: 0;
}
100% {
height: 100%;
bottom: 0;
}
}
@keyframes move1 {
0% {
height: 100%;
bottom: 0;
}
54% {
height: 0;
bottom: 100%;
}
55% {
height: 0;
bottom: 0;
}
100% {
height: 100%;
bottom: 0;
}
}
@-webkit-keyframes move2 {
0% {
width: 0;
left: 0;
}
50% {
width: 100%;
left: 0;
}
100% {
width: 0;
left: 100%;
}
}
@keyframes move2 {
0% {
width: 0;
left: 0;
}
50% {
width: 100%;
left: 0;
}
100% {
width: 0;
left: 100%;
}
}
@-webkit-keyframes move3 {
0% {
height: 100%;
top: 0;
}
54% {
height: 0;
top: 100%;
}
55% {
height: 0;
top: 0;
}
100% {
height: 100%;
top: 0;
}
}
@keyframes move3 {
0% {
height: 100%;
top: 0;
}
54% {
height: 0;
top: 100%;
}
55% {
height: 0;
top: 0;
}
100% {
height: 100%;
top: 0;
}
}
@-webkit-keyframes move4 {
0% {
width: 0;
right: 0;
}
55% {
width: 100%;
right: 0;
}
100% {
width: 0;
right: 100%;
}
}
@keyframes move4 {
0% {
width: 0;
right: 0;
}
55% {
width: 100%;
right: 0;
}
100% {
width: 0;
right: 100%;
}
}
/*----/----Nav Bar*/
/*in*/
.in {
float:left;
display: inline-block;
width: 25px;
height: 25px;
padding: 15px;
cursor: pointer;
color: #fff;
font-size:.8em;
letter-spacing:0.05em;
border-top: 0.5px solid rgba(0, 0, 0, .2);
}
/*----/----in*/
/*logo*/
.logo {
position: absolute;
left: 47%;
display: inline-block;
width: 15px;
height: 15px;
padding: 18px;
cursor: pointer;
color: #fff;
font-size:.8em;
letter-spacing:0.05em;
}
/*----/----logo*/
/****landscape****/
@media only screen and (max-width: 555px) {
.nav li{
display: block;
padding: 30px;
}
}
/*----/----Landscape*/
HTML：
/*navigation icon animation*/
var trigger = 'X';
jQuery(document).ready(function () {
$('#toggle-menu').click(function () {
trigger = 'X';
$(this).toggleClass('menu-is-active')
});
/* click outside of nav to trigger navigation icon animation*/
$(document).click(function () {
if (trigger == 'X') {
$("#toggle-menu").toggleClass();
trigger = 'ham';
}
});
$("nav").click(function (e) {
e.stopPropagation();
return false;
});
/*----/----navigation icon animation*/
/*toggle menu*/
jQuery("#toggle-menu").click(function () {
jQuery(".nav").slideToggle();
});
/* click outside of nav to close toggle*/
$(document).click(function () {
$(".nav").hide();
});
$("#toggle-menu").click(function (e) {
e.stopPropagation();
return false;
});
/*----/----toggle menu*/
/*navbar toggle color*/
$("#toggle-menu").click(function (e) {
$(".nav").addClass(".whitenavbar");
$('.nav').addClass('navfade');
}
else {
$('.nav').removeClass(".whitenavbar");
}
});
/*----/----navbar toggle color*/
/*Jump Scroll*/
$(function () {
var $window = $(window),
$document = $(document),
transitionSupported = typeof document.body.style.transitionProperty === "string",
scrollTime = 1; // scroll time in seconds
$(document).on("click", "a[href*=#]:not([href=#])", function (e) {
var target, avail, scroll, deltaScroll;
if (location.pathname.replace(/^\//, "") == this.pathname.replace(/^\//, "") && location.hostname == this.hostname) {
target = $(this.hash);
target = target.length ? target : $("[id=" + this.hash.slice(1) + "]");
if (target.length) {
avail = $document.height() - $window.height();
if (avail > 0) {
scroll = target.offset().top;
if (scroll > avail) {
scroll = avail;
}
} else {
scroll = 0;
}
deltaScroll = $window.scrollTop() - scroll;
if (!deltaScroll) {
return; // do nothing
}
e.preventDefault();
if (transitionSupported) {
$("html").css({
"margin-top": deltaScroll + "px",
"transition": scrollTime + "s ease-in-out"
}).data("transitioning", scroll);
} else {
$("html, body").stop(true, true)
.animate({
scrollTop: scroll + "px"
}, scrollTime * 1000);
return;
}
}
}
});
if (transitionSupported) {
$("html").on("transitionend webkitTransitionEnd msTransitionEnd oTransitionEnd", function (e) {
var $this = $(this),
scroll = $this.data("transitioning");
if (e.target === e.currentTarget && scroll) {
$this.removeAttr("style").removeData("transitioning");
$("html, body").scrollTop(scroll);
}
});
}
});
/*----/----Jump Scroll*/
/*contact let me know toggle*/
$("#container").hide();
$("#button").on('click', function() {
if($("#button").val() == 'thank you')
return false;
if($("#container").is(":visible"))
return false;
$("#container").toggle();
this.value = this.value == 'send me a message' ? 'contact' : 'send me a message';
});
$("#button2").on('click', function(e) {
$("#container").toggle();
$("#button").val('thank you');
});
/*----/-----contact let me know toggle*/
/*navigation background fade in fade out */
$(window).scroll(function () {
var dist = $('#panel2').offset().top;
console.log(dist);
if ($(window).scrollTop() > dist) {
$('.header').addClass('bg');
$('.header').addClass('navfade');
}
else {
$('.header').removeClass('bg');
}
});
$('.scroll').on('click', function (e) {
e.preventDefault()
$('html, body').animate({
scrollTop: $(this.hash).offset().top
}, 1500);
});
/*----/-----navigation background fade in fade out */
});
</script>
答案 0 :(得分：1)
我不确定，但我认为可能之所以没有切换是因为其他声明，因为它看起来就像是在点击你添加这些类时，如果没有点击，你就会删除它们，但如果没有点击它们，你就不会在第一时间添加它们（如果这有意义的话），也许这就是为什么它不会切换。
当我尝试运行JSFiddle时遇到错误（我可能只是点击了错误的东西）但是如果你想让导航栏在点击时变白，你可以改变它CSS，并且因为更改CSS是一个更简单的解决方案，它可能不太可能首先导致切换问题。
$(".nav").css("background", "white");
答案 1 :(得分：1)
在为元素定义的css之后，尝试以下定义你的whitenavbar css。它适用于header。如果要应用于其他元素，则相应地进行更改。如果你更改.nav背景，它将不可见。下一个选项是更改.navigation
/*toggle menu*/
jQuery("#toggle-menu").click(function () {
jQuery(".nav").slideToggle();
if($("div.header").hasClass("whitenavbar") == false){
$("div.header").addClass("whitenavbar");
}else{
$("div.header").removeClass("whitenavbar");
}
});
css注意它是在.header {} css
之后 /*Nav Bar*/
.header {
/*border-bottom: 0.5px solid rgba(0,0,0,.2);*/
width: 100%;
position: fixed;
top: 0;
left: 0;
z-index: 99999;
background-color: rgb(184, 184, 184);
/*background: none;*/
}
.whitenavbar {
background: teal;
}