javascript - 切换菜单时更改导航栏背景颜色 jQuery

Question

我试图让导航栏在任何滚动之前位于页面顶部时允许在切换导航菜单时将背景颜色从透明更改为白色。我已经尝试添加类 .whitenavbar 和 jQuery 以伴随 (/navbar toggle color/) 但它不起作用，现在根本无法切换菜单？

感谢任何帮助!

https://jsfiddle.net/43taovan/

CSS:

.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*/

j查询

/*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>

HTML:

<div class="header">
<div class="navbar">
<a href="" class="in" style="display: inline-block;"> 
<svg class="navinstagram" version="1.1" id="Layer_1"      xmlns="http://www.w3.org/2000/svg"      xmlns:xlink="http://www.w3.org/1999/xlink" x="0px" y="0px"
viewBox="0 0 155.2 144" style="enable-background:new 0 0 155.2 144;"      xml:space="preserve">
<path  d="M42.7,122.7H21.3V54h21.4V122.7z M32,44.6c-6.8,0-12.4-5.6- 12.4-12.4c0-6.8,5.5-12.4,12.4-12.4
c6.8,0,12.4,5.5,12.4,12.4C44.4,39,38.9,44.6,32,44.6z M122.7,122.7h- 21.3V89.3c0-8-0.1-18.2-11.1-18.2c-11.1,0-12.8,8.7-12.8,17.6
v34H56.1V54h20.5v9.4h0.3c2.8-5.4,9.8-11.1,20.2- 11.1c21.6,0,25.6,14.2,25.6,32.7V122.7z"/>
<g>
<path style="fill:#FFFFFF;" d="M151.9,120c0.7-0.1,1-0.5,1-1.1c0-0.8-     0.5-1.1-1.4-1.1H150v4h0.6V120h0.7l0,0l1.1,1.7h0.6L151.9,120
L151.9,120z M151.3,119.6h-0.7v- 1.4h0.9c0.4,0,0.9,0.1,0.9,0.6C152.4,119.5,151.9,119.6,151.3,119.6z"/>
<path style="fill:#FFFFFF;" d="M151.3,116c-2.1,0-3.8,1.7- 3.8,3.8c0,2.1,1.7,3.8,3.8,3.8c2.1,0,3.8-1.7,3.8-3.8
C155.2,117.6,153.5,116,151.3,116z M151.3,123.1c-1.8,0-3.3-1.4-3.3- 3.3c0-1.9,1.4-3.3,3.3-3.3c1.8,0,3.3,1.4,3.3,3.3
C154.6,121.7,153.2,123.1,151.3,123.1z"/>
</g>
</svg>
</a>

<a href="" class="logo logocolorchng" style="display: inline- block;">Logo     </a>

<a id="toggle-menu">
<div> 
<span class="top"></span>
<span class="middle"></span>
<span class="bottom"></span>
</div>
</a>

</div>
<div class="nav">

<div class="navigation">
<ul>
<li class="navlist"><a href="" style="display: inline-block; width:100%;">Home</a></li>            
<li class="navlist"><a href="#panel2" style="display: inline-block;     width:100%;">Work</a></li>
<li class="navlist"><a href="#wrapper" style="display: inline-block;  width:100%;">Contact</a></li>
</ul>
</div>

<div id="navpromo">
        <ul>
            <li class="seemore">Want to see more? Check out my    instagram!</li>
            </li>

            <div class='instbtn-cont'>
<a class='instbtn' href='#'>
Instagram
<span class='line-1'></span>
<span class='line-2'></span>
<span class='line-3'></span>
<span class='line-4'></span>
</a>
</div>
            </li>
        </ul>
    </div>
</div>
</div>

Answer 1

尝试在您已经为元素定义的 css 之后定义您的 whitenavbar css。它适用于标题。如果你想应用到其他元素然后相应地改变。如果您更改 .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;
    }