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vue-router.html
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vue-router.html
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<!DOCTYPE html>
<html>
<head>
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<h1 class="title">Vue-router的一些记录</h1>
<section class="info">
<span class="avatar" style="background-image: url(https://joe-10005639.cossh.myqcloud.com/jkbb.jpg);"></span> <a class="name" href="javascript:;">江矿叔叔.</a>
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</section>
<article class="content"><h3>vue-router 传参</h3>
<p>在使用 vue-router 进行页面跳转的时候，有以下两种方式可以实现：
* 声明式: <code><router-link>Home</router-link></code></p>
<pre><code class="language-html"><!-- 字符串 -->
<router-link to="home">Home</router-link>
<!-- 渲染结果 -->
<a href="home">Home</a>
<!-- 使用 v-bind 的 JS 表达式 -->
<router-link v-bind:to="'home'">Home</router-link>
<!-- 不写 v-bind 也可以，就像绑定别的属性一样 -->
<router-link :to="'home'">Home</router-link>
<!-- 同上 -->
<router-link :to="{ path: 'home' }">Home</router-link>
<!-- 命名的路由 -->
<router-link :to="{ name: 'user', params: { userId: 123 }}">User</router-link>
<!-- 带查询参数，下面的结果为 /register?plan=private -->
<router-link :to="{ path: 'register', query: { plan: 'private' }}">Register</router-link>
</code></pre>
<ul>
<li>编程式: <code>router.push(...)</code></li>
</ul>
<p>该方法的参数可以是一个字符串路径，或者一个描述地址的对象。例如：</p>
<pre><code class="language-javascript">// 字符串
router.push('home')
// 对象
router.push({ path: 'home' })
// 命名的路由
router.push({ name: 'user', params: { userId: 123 }})
// 带查询参数，变成 /register?plan=private
router.push({ path: 'register', query: { plan: 'private' }})
</code></pre>
<p>注意：如果提供了 path，params 会被忽略，上述例子中的 query 并不属于这种情况。取而代之的是下面例子的做法，你需要提供路由的 name 或手写完整的带有参数的 path：</p>
<pre><code class="language-javascript">const userId = 123
router.push({ name: 'user', params: { userId }}) // -> /user/123
router.push({ path: `/user/${userId}` }) // -> /user/123
// 这里的 params 不生效
router.push({ path: '/user', params: { userId }}) // -> /user
</code></pre>
<p>这两种方式传递参数的方式其实是一样的，从写法也可以大致看出，下面就对参数的传递方式进行介绍
首先创建一个Router实例</p>
<pre><code class="language-javascript">const router = new VueRouter({
routes: [
{
path: '/user',
name: 'user',
component: User
}
]
})
</code></pre>
<h4>1.使用params方式</h4>
<pre><code class="language-javascript">router.push({ name: 'user', params: { userId: 123 }}) // -> /user
</code></pre>
<p>获取参数:</p>
<pre><code class="language-javascript">router.params.userId //123
</code></pre>
<p>这种方式看上去不错，对于传递的参数没有在浏览器的地址栏显示，而是隐藏了。但是当我们再次刷新的时候,<code>router.params.userId</code>就变成了<code>undefined</code>，对于这个解决方法如下:
修改Router实例，在路由路径上增加该参数</p>
<pre><code class="language-javascript">const router = new VueRouter({
routes: [
{
path: '/user/:userId',
name: 'user',
component: User
}
]
})
</code></pre>
<p>此时，浏览器的地址栏就会变成:/user/123,然后不管怎么刷新也会取到参数。其实使用<code>query</code>方式传递参数也可以避免这个问题。</p>
<h4>2.使用query方式</h4>
<pre><code class="language-javascript">router.push({ path: '/user', query: { userId: 123 }}) // ->/user?userId=123
</code></pre>
<p>获取参数:</p>
<pre><code class="language-javascript">router.query.userId //123
</code></pre>
</article>
<section class="author">
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<a class="name" href="javascript:;">江矿叔叔.</a>
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