实现一个 hash 路由
HTML 部分
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| <!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8" />
<meta http-equiv="X-UA-Compatible" content="IE=edge" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<title>Document</title>
</head>
<body>
<div class="header">
<div>
<a href="#">首页</a>
</div>
<div>
<a href="#about">关于</a>
</div>
<div><a href="#me">我的</a></div>
<div onclick="window.history.go(-1)">返回</div>
</div>
</body>
<style>
.header {
background-color: black;
height: 100px;
line-height: 100px;
display: flex;
color: #fff;
justify-content: space-around;
}
a:link,
a:hover,
a:active,
a:visited {
color: #fff;
text-decoration: none;
}
</style>
<script src="./hashroutes.js"></script>
</html>
|
JS 部分
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| class Route {
constructor() {
console.log(this);
this.routes = {};
this.refresh = this.refresh.bind(this);
window.addEventListener("load", this.refresh);
window.addEventListener("hashchange", this.refresh);
}
route(path, callback) {
this.routes[path] = callback || function () {};
}
refresh() {
console.log(this);
let path = `/${window.location.hash.slice(1) || ""}`;
console.log(path);
let cb = this.routes[path];
cb && cb();
}
}
let Router = new Route();
let body = document.querySelector("body");
Router.route("/", function (res) {
body.style.backgroundColor = "red";
});
Router.route("/about", function () {
body.style.backgroundColor = "blue";
});
Router.route("/me", function () {
body.style.backgroundColor = "green";
});
|
实现一个 history 路由
hash 虽然能解决问题，但是带有#不太美观。
方法
- window.history.back()
- window.history.forward()
- window.history.go(number)
- window.history.pushState() 新增=》A B =》 A B C
- window.history.replaceState() 覆盖/替换 A B =》 A C
- history 模式下可以使用 Popstate 事件来监听 url 的变化
- pushState 和 replaceState 并不会触发 Popstate 事件
- 哪些情况会触发 popstate 呢？
- 浏览器的前进/后退按钮
- history/back/forward/go
参数
- state:是一个对象，是一个指定网址相关的状态对象，如果不需要，可以为 null
- title：新页面的标题，null
- URL：新的网址，必须与当前页面出于同一个域，才会显示
部署 history 路由的时候，要使你的路由中的所有 path 都访问到 index.html 文件
HTML 部分
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| <!DOCTYPE html>
<html lang="en">
<body>
<div class="header">
<div>
<a href="/gray">灰色</a>
</div>
<div>
<a href="/green">绿色</a>
</div>
<div><a href="/">白色</a></div>
<div onclick="window.history.go(-1)">返回</div>
</div>
</body>
<style>
.header {
background-color: black;
height: 100px;
line-height: 100px;
display: flex;
color: #fff;
justify-content: space-around;
}
a:link,
a:hover,
a:active,
a:visited {
color: #fff;
text-decoration: none;
}
</style>
<script src="./hashroutes.js"></script>
</html>
|
JS 部分
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| class Route {
constructor() {
this.routes = {};
this.bindPopState();
}
route(path, callback) {
this.routes[path] = callback || function () {};
}
init(path) {
window.history.replaceState({ path }, null, path);
this.execCallbackByPath(path);
}
bindPopState() {
window.addEventListener("popstate", (e) => {
const path = e.state && e.state.path;
console.log(path);
this.execCallbackByPath(path);
});
}
go(path) {
window.history.pushState(
{
path,
},
null,
path
);
this.execCallbackByPath(path);
}
execCallbackByPath(path) {
const cb = this.routes[path];
if (cb) {
cb();
}
}
}
let Router = new Route();
let body = document.querySelector("body");
Router.route("/", function (res) {
body.style.backgroundColor = "red";
});
Router.route("/about", function () {
body.style.backgroundColor = "blue";
});
Router.route("/me", function () {
body.style.backgroundColor = "green";
});
|
VueRouter
- vue router 从列表浏览了一段时间,点击进了一个详情页,然后返回的时候,我期望回到列表页还是停留在原来的浏览位置,你可以怎么做?
- keep-alive
- localStorage/sessionStorage + scrollTop + scrollTo
- scrollBehavior
- router-view 是什么?
类似于动态的组件.
找到当前路径对应的 component, 并展示出来.