<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1">
<title>메뉴를 따라다니는 메뉴바</title>
<meta name="viewport" content="width=device-width; initial-scale=1.0">
<script src="http://code.jquery.com/jquery-latest.js"></script>
<style>
* { box-sizing: border-box;}
body {
background: #1A1E23;
font-family: "Lato", sans-serif;
-webkit-font-smoothing: antialiased;
}
nav {
position: relative;
padding-bottom: 12px;
}
nav .line {
height: 2px;
position: absolute;
bottom: 0;
margin: 10px 0 0 0;
background: #FF1847;
}
nav ul {
padding: 0;
margin: 0;
list-style: none;
display: -webkit-box;
display: flex;
}
nav ul li {
margin: 0 40px 0 0;
opacity: 0.4;
-webkit-transition: all 0.4s ease;
transition: all 0.4s ease;
}
nav ul li:hover {
opacity: 0.7;
}
nav ul li.active {
opacity: 1;
}
nav ul li:last-child {
margin-right: 0;
}
nav ul li a {
text-decoration: none;
color: #fff;
text-transform: uppercase;
display: block;
font-weight: 600;
letter-spacing: 0.2em;
font-size: 14px;
}
body {
display: -webkit-box;
display: flex;
-webkit-box-pack: center;
justify-content: center;
-webkit-box-align: center;
align-items: center;
min-height: 100vh;
}
</style>
</head>
<body>
<nav>
<ul>
<li class="active"><a href="">First</a></li>
<li><a href="">Second</a></li>
<li><a href="">Third</a></li>
</ul>
</nav>
<script>
var nav = $('nav');
var line = $('<div />').addClass('line');
line.appendTo(nav);
var active = nav.find('.active');
var pos = 0;
var wid = 0;
if(active.length) {
pos = active.position().left;
wid = active.width();
line.css({
left: pos,
width: wid
});
}
nav.find('ul li a').click(function(e) {
e.preventDefault();
if(!$(this).parent().hasClass('active') && !nav.hasClass('animate')) {
nav.addClass('animate');
var _this = $(this);
nav.find('ul li').removeClass('active');
var position = _this.parent().position();
var width = _this.parent().width();
if(position.left >= pos) {
line.animate({
width: ((position.left - pos) + width)
}, 300, function() {
line.animate({
width: width,
left: position.left
}, 150, function() {
nav.removeClass('animate');
});
_this.parent().addClass('active');
});
} else {
line.animate({
left: position.left,
width: ((pos - position.left) + wid)
}, 300, function() {
line.animate({
width: width
}, 150, function() {
nav.removeClass('animate');
});
_this.parent().addClass('active');
});
}
pos = position.left;
wid = width;
}
});
</script>
</body>
</html>
출처: wsss.tistory.com/561
