javascript - Javascript 滚动突出显示不起作用

Question

所以我正在尝试构建我的网站，我有一个非常漂亮的粘性标题，我正在尝试获得一种滚动 spy 效果，而不使用 Bootstrap 。 如果有意义的话，我希望正在查看的导航的当前部分用事件类突出显示。

问题是，我的 jquery 知识为 0，所以我从 youtube 视频中复制了一些代码，但我无法有效地实现它。有人可以更正此查询代码，使其在导航栏中突出显示当前正在查看的部分，并在用户滚动到另一个部分时进行更新，从而使该部分在导航栏中突出显示吗？

Ps - 我再说一遍，我不想与 bootstrap xD 有任何关系

这是我的密码笔链接http://codepen.io/anon/pen/bZmRZN

Any help would be amazing!

Answer 1

你忘记在(function() {之前调用jQuery了在你的服务器上试试 :)

$(function() {
	var navLinks = $('nav ul li a'),
			navH = $('nav').height(),
			section = $('section'),
			documentEl = $(document);

	documentEl.on('scroll', function() {
			var currentScrollPos = documentEl.scrollTop();

			section.each(function() {
					var self = $(this);
					if ( self.offset().top < (currentScrollPos + navH) && (currentScrollPos + navH) < (self.offset().top + self.outerHeight()) ) {
							var targetClass = '.' + self.attr('class') + '-marker';
							navLinks.removeClass('active');
							$(targetClass).addClass('active');
					}
			});

	});
})();

@charset "utf-8";
* {
  /*reset*/
  background: none repeat scroll 0 0 transparent;
  border: medium none;
  border-spacing: 0;
  font-size: 16px;
  font-weight: normal;
  line-height: 1.42rem;
  list-style: none outside none;
  margin: 0;
  padding: 0;
  text-align: left;
  text-decoration: none;
  text-indent: 0;
  box-sizing: border-box;
}

html, body, div, span, applet, object, iframe,
h1, h2, h3, h4, h5, h6, p, blockquote, pre,
a, abbr, acronym, address, big, cite, code,
del, dfn, em, img, ins, kbd, q, s, samp,
small, strike, strong, sub, sup, tt, var,
b, u, i, center,
dl, dt, dd, ol, ul, li,
fieldset, form, label, legend,
table, caption, tbody, tfoot, thead, tr, th, td,
article, aside, canvas, details, embed,
figure, figcaption, footer, header, hgroup,
menu, nav, output, ruby, section, summary,
time, mark, audio, video {
	margin: 0;
	padding: 0;
	border: 0;
	font-size: 100%;
	font: inherit;
	vertical-align: baseline;
}

/* HTML5 display-role reset for older browsers */
article, aside, details, figcaption, figure,
footer, header, hgroup, menu, nav, section {
	display: block;
}
body {
	line-height: 1;
}
ol, ul {
	list-style: none;
}
blockquote, q {
	quotes: none;
}
blockquote:before, blockquote:after,
q:before, q:after {
	content: '';
	content: none;
}
table {
	border-collapse: collapse;
	border-spacing: 0;
}
button{
  -webkit-appearance: none !important;
}
a{
  -webkit-appearance: none;
}
/*End Reset*/

/*Fonts*/
@font-face {
  font-family: 'bebas_neuebold';
  src:  url('../fonts/bebasneue_bold-webfont.woff2') format('woff2'),
        url('../fonts/bebasneue_bold-webfont.woff') format('woff');
}
@font-face {
  font-family: 'bebas_neuebook';
  src:  url('../fonts/bebasneue_book-webfont.woff2') format('woff2'),
        url('../fonts/bebasneue_book-webfont.woff') format('woff');
}
@font-face {
  font-family: 'bebas_neuelight';
  src:  url('../fonts/bebasneue_light-webfont.woff2') format('woff2'),
        url('../fonts/bebasneue_light-webfont.woff') format('woff');
}
@font-face {
  font-family: 'bebas_neue_regularregular';
  src:  url('../fonts/bebasneue_regular-webfont.woff2') format('woff2'),
        url('../fonts/bebasneue_regular-webfont.woff') format('woff');
}
@font-face {
  font-family: 'bebas_neuethin';
  src:  url('../fonts/bebasneue_thin-webfont.woff2') format('woff2'),
        url('../fonts/bebasneue_thin-webfont.woff') format('woff');
}
@font-face {
  font-family: 'bebas_neueregular';
  src:  url('../fonts/bebasneue-webfont.woff2') format('woff2'),
        url('../fonts/bebasneue-webfont.woff') format('woff');
}
.bebas-bold{
	font-family: bebas_neuebold !important;
  letter-spacing: 0.05em;
}
.bebas-book{
	font-family: bebas_neuebook !important;
}
.bebas-light{
	font-family: bebas_neuelight !important;
  letter-spacing: 0.05em;
}
.bebas-thin{
  font-family: bebas_neuethin !important;
  letter-spacing: 0.05em;
}
.bebas-reg{
	font-family: bebas_neue_regularregular !important;
  letter-spacing: 0.05em;
}
/*End fonts*/
body {
  font-family: "Helvetica Neue Light", "Helvetica Neue", Helvetica, Arial, "Lucida Grande", sans-serif;
  font-weight: 300;
  background-color: #505050;
  padding: 0px;
  margin: 0px;
}

/*Header*/
#navwrapper{
  width: 100%;
  position: fixed;
  z-index: 1;
  top: 0;
  left: 0;
  right: 0;
}
li img {
	height:95px;
	width:95px;
}

ul{
  display: table;
  margin: 0 auto;
}

ul.topnav {
  padding: 0;
  overflow: hidden;
}

.toggleNavButton {
  transition-duration: 0.5s;
  width: 40px;
  height: 2px;
  background-color: black;
  position: absolute;
  /*left: 50%;*/
  top: 25px;
  margin-left: 20px;
  border-radius: 2px;
}
.toggleNavButton:before,
.toggleNavButton:after {
  border-radius: 2px;
  transition-duration: 0.5s;
  content: "";
  position: absolute;
  top: 10px;
  left: 0;
  background-color: black;
  width: 40px;
  height: 2px;
}
.toggleNavButton:after {
  top: 20px;
}
.toggleNavButton.active {
  width: 0;
}
.toggleNavButton.active:after {
  top: 10px;
  transform: rotate(45deg);
  -webkit-transform: rotate(45deg);
}
.toggleNavButton.active:before {
  transform: rotate(-45deg);
  -webkit-transform: rotate(-45deg);
}
/* Float the list items side by side */
nav ul.topnav li {
  float: left;
}

.padnav{
  padding: 0px 35px 0px 35px;
  margin-top:35px;
}

/* Style the links inside the list items */
nav ul li a {
  display: block;
  color: #1b1b1b;
  text-align: center;
  text-decoration: none;
  transition: 0.5s;
  font-size: 1.5em;
  padding: 5px;
}

/* Change background color of links on hover */
nav ul li.padnav a:hover {
  -webkit-transition: 0.2s; /* Safari */
  transition: 0.2s;
  border-bottom: 5px solid #2098D1;

}

.active{
  -webkit-transition: 0.1s; /* Safari */
  transition: 0.1s;;
  border-bottom: 5px solid #2098D1;
}

.hide{
  display: none;
  width: 0px;
  height: 0px;
}

nav{
  position: fixed;
}

/* Hide the list item that contains the link that should open and close the topnav on small screens */
ul.topnav li.icon {
  display: none;
}

/* When the screen is less than 680 (changed to 770 to accomodate) pixels wide, hide all list items, except for the first one ("Home"). Show the list item that contains the link to open and close the topnav (li.icon) */
@media screen and (max-width:767px) {
  ul.topnav li:not(:first-child) {
    display: none;
  }

  ul.topnav li:nth-child(1){
    display: inline-block !important;
    width: auto !important;
    height: auto !important;
  }

  ul.topnav li.icon {
    float: right;
    display: inline-block;
    width: 60px;
  }
  ul.topnav li{
    padding: 0px !important;
  }
  ul.topnav a{
    margin-top: 25px !important;
    margin-right: 25px !important;
    padding: 0px !important;
  }

  li img {
    display: none;
  }

  .topnav{
    width: 100% !important;
  }

  #navhit{
    height: 50px;
    width: 80px;
    float: right;
    display: inline-block;
    margin-top: -8px;
  }

  li.padnav{
    padding: 0px !important;
    margin-top: 0px !important;
  }

  ul.topnav li.padnav a:hover {
    border: none !important;
  }

  #navwrapper{
    padding-bottom: 20px;
  }
}
/* The "responsive" class is added to the topnav with JavaScript when the user clicks on the icon. This class makes the topnav look good on small screens */
@media screen and (max-width:767px) {
  ul.topnav.responsive {position: relative;}
  ul.topnav.responsive li.icon {
    position: absolute;
    right: 0;
    top: 0;
  }
  ul.topnav.responsive li {
    float: none;
    display: inline;
  }
  ul.topnav.responsive li a {
    display: block;
    text-align: left;
  }
}
/*sections*/
section {
  width: 100%;
  padding: 0 7%;
  display: table;
  margin: 0;
  max-width: none;
  height: 100vh;
}

section.landing{
  background-color: #f39c12;
}

section.about{
  background-color: #9b59b6;
}

section.project{
  background-color: #2ecc71;
}

section.blog{
  background-color: #95a5a6;
}

section.contact{
  background-color: #f1c40f;
}

.landing{
  height: 95vh;
}

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div id="navwrapper">
	<nav class="navbar bebas-reg container">
		<ul class="topnav" id="myTopnav">
			<li class="padnav"><a href="about.html" class="about-marker active">About</a></li>
			<li class="padnav"><a href="projects.html" class="proj-marker">Projects</a></li>
			<li class="logo"><img src="img/logo-black.png"></img></li>
			<li class="padnav"><a href="contact" class="contact-marker">Contact</a></li>
			<li class="padnav"><a href="blog" class="blog-marker">Blog</a></li>
		</ul>
	</nav>
</div>


<section class="landing">
	<h1> landing </h1>
</section>

<section class="about">
	<h1> about </h1>
</section>

<section class="proj">
	<h1> proj </h1>
</section>

<section class="contact">
	<h1> contact </h1>
</section>

<section class="blog">
	<h1> blog </h1>
</section>