<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0, minimum-scale=1.0, maximum-scale=1.0, user-scalable=no">
<meta name="author" content="">
<title>原生模拟 Vue 路由切换</title>
<style type="text/css">
.router_box,
#router-view {
max-width: 1000px;
margin: 50px auto;
padding: 0 20px;
}
.router_box>a {
padding: 0 10px;
color: #42b983;
}
</style>
</head>
<body>
<div class="router_box">
<a href="/home" class="router">主页</a>
<a href="/news" class="router">新闻</a>
<a href="/team" class="router">团队</a>
<a href="/about" class="router">关于</a>
</div>
<div id="router-view"></div>
<script type="text/javascript">
function Vue(parameters) {
let vue = {};
vue.routes = parameters.routes || [];
vue.init = function() {
document.querySelectorAll(".router").forEach((item, index) => {
item.addEventListener("click", function(e) {
let event = e || window.event;
event.preventDefault();
window.location.hash = this.getAttribute("href");
}, false);
});
window.addEventListener("hashchange", () => {
vue.routerChange();
});
vue.routerChange();
};
vue.routerChange = () => {
let nowHash = window.location.hash;
let index = vue.routes.findIndex((item, index) => {
return nowHash == ('#' + item.path);
});
if (index >= 0) {
document.querySelector("#router-view").innerHTML = vue.routes[index].component;
} else {
let defaultIndex = vue.routes.findIndex((item, index) => {
return item.path == '*';
});
if (defaultIndex >= 0) {
window.location.hash = vue.routes[defaultIndex].redirect;
}
}
};
vue.init();
}
new Vue({
routes: [{
path: '/home',
component: "<h1>主页</h1><a href='https://github.com/biaochenxuying'>https://github.com/biaochenxuying</a>"
}, {
path: '/news',
component: "<h1>新闻</h1><a href='http://biaochenxuying.cn/main.html'>http://biaochenxuying.cn/main.html</a>"
}, {
path: '/team',
component: '<h1>团队</h1><h4>全栈修炼</h4>'
}, {
path: '/about',
component: '<h1>关于</h1><h4>关注公众号:BiaoChenXuYing</h4><p>分享 WEB 全栈开发等相关的技术文章,热点资源,全栈程序员的成长之路。</p>'
}, {
path: '*',
redirect: '/home'
}]
});
</script>
</body>
</html>
这段代码中的new vue什么时候会调用啊?这段代码中的function Vue()什么时候调用啊?它们之间的关联关系是怎样的,有能看懂的吗?
dom加载完 解析到 new Vue({...})的时候 调用的 函数Vue
function Vue(){} 是函数声明 new Vue({...})是 函数调用及传值