shy tusk
Say we have a project in Astro with a dashboard for users almost completely in vue, specifically the parts that are interactive. We have a navbar menu that shows the current selected element thus it depends on the URL you are on i.e. /dashboard or /dashboard/me
How to access pathname or router.href in Vue in an astro project?
frosty ravenBOT
Hi @shy tusk. I'm kapa.ai, your friendly support bot. I will try to answer your question by searching through the knowledge base. :wave:
To access the current pathname in a Vue component within an Astro project, you have a few options:
The most straightforward approach is to pass the current pathname from your Astro component to your Vue component as a prop:
---
// In your Astro file (e.g., dashboard.astro)
import NavbarMenu from '../components/NavbarMenu.vue';
const currentPathname = Astro.url.pathname;
---
<NavbarMenu client:load pathname={currentPathname} />
Then in your Vue component, you can receive and use this prop:
<script setup>
const props = defineProps({
pathname: String
});
</script>
<template>
<nav>
<a :class="{ active: pathname === '/dashboard' }" href="/dashboard">Dashboard</a>
<a :class="{ active: pathname === '/dashboard/me' }" href="/dashboard/me">Profile</a>
</nav>
</template>
Alternatively, you can access the current URL directly in your Vue component using the browser's window.location object:
<script setup>
import { ref, onMounted } from 'vue';
const pathname = ref('');
onMounted(() => {
pathname.value = window.location.pathname;
});
</script>
Remember that this approach will only work after the component is mounted on the client side, as window is not available during server-side rendering.
If you're using Vue components as server islands, you can access the page URL through the Referer header as mentioned in the Astro documentation:
---
// In your server island component
const referer = Astro.request.headers.get('Referer');
const url = new URL(referer);
const pathname = url.pathname;
---
Then pass this to your Vue component as a prop.
shy tusk
@frosty raven I thought vue is just client side and has no SSR, if I use the first option why the console.log for testing purposes I am using is both in the server first and when I actually click it in client too?
frosty ravenBOT
Let me check the knowledge base for you again. One moment! :books:
You're right to be confused about this behavior. In Astro, Vue components can actually render in both server and client environments, which explains why you're seeing console logs in both places.
Vue components in Astro are rendered on the server by default, even though they can also be hydrated on the client side. As the documentation explains:
Framework components (like React and Svelte) are unique: They render server-side by default, meaning that
console.log()debug output will be visible in the terminal. However, they can also be hydrated for the browser, which may cause your debug logs to also appear in the browser.
Troubleshooting
This is part of Astro's "Islands Architecture" where:
Astro components are the building blocks of your page template. They render to static HTML with no client-side runtime.
Think of a client island as an interactive widget floating in a sea of otherwise static, lightweight, server-rendered HTML.
Islands Architecture
When you use a Vue component with a client:* directive (like client:load), the component:
This is why your console.log statements appear in both places - they run during the initial server render and then again when the component hydrates in the browser.
If you want to avoid the server-side console logs, you could:
client:only="vue" directive instead, which skips server rendering entirely:<NavbarMenu client:only="vue" pathname={currentPathname} />
As the documentation states:
client:only={string}skips HTML server rendering, and renders only on the client.
client:only directive
<script setup>
import { onMounted } from 'vue';
onMounted(() => {
console.log('This will only log in the browser');
});
</script>