<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<meta http-equiv="X-UA-Compatible" content="ie=edge" />
<title>Document</title>
<script src="./TabsController.js"></script>
<style>
ul,
li {
list-style: none;
margin: 0;
padding: 0;
}
.tab .tab-bar {
display: flex;
border-bottom: 1px solid blue;
}
.tab .tab-bar li {
margin: 3px 20px 0 0;
width: 30px;
text-align: center;
}
.tab .tab-bar li.active {
border: 1px solid blue;
border-bottom: none;
}
.tab .tab-content li {
display: none;
}
.tab .tab-content li.active {
display: block;
}
</style>
</head>
<body>
<div class="tab">
<ul class="tab-bar">
<li>
1
</li>
<li>
2
</li>
<li>
3
</li>
</ul>
<ul class="tab-content">
<li>content1</li>
<li>content2</li>
<li>content3</li>
</ul>
</div>
</body>
<script>
new TabsController(document.querySelector(".tab"));
</script>
</html>
class TabsController {
constructor(element) {
this.nav = element.querySelector(".tab-bar").children;
this.content = element.querySelector(".tab-content").children;
this.active = 1;
this.init();
this.bindEvents();
}
init() {
this.nav[0].classList.add("active");
this.content[0].classList.add("active");
}
bindEvents() {
const forEach = (context, fn) => Array.prototype.forEach.call(context, fn);
const indexOf = (context, item) =>
Array.prototype.indexOf.call(context, item);
forEach(this.nav, i => {
i.addEventListener("click", e => {
forEach(this.nav, i => i.classList.remove("active"));
forEach(this.content, i => i.classList.remove("active"));
this.active = indexOf(this.nav, e.target);
this.nav[this.active].classList.add("active");
this.content[this.active].classList.add("active");
});
});
}
}