N
Nuxtβ€’5d ago
Cranberry

feature flag implementation

hi people πŸ§‘β€πŸ€β€πŸ§‘ . we are implementing feature flags but since nuxt's components are rendering in both server and client, how we can prevent users to manipulate flags. when we set page to server only, then client js does not work. there are experimental features we can utilize but i would like to ask you first if there is a better way. thank you in advance <3
2 Replies
kapa.ai
kapa.aiβ€’5d ago
Hi @Cranberry. I'm kapa.ai, your friendly support bot. I will try to answer your question by searching through the knowledge base. :wave: ---------------------- Implementing Feature Flags in Nuxt When implementing feature flags in Nuxt, you need to consider both server and client rendering to prevent users from manipulating flags. Here are some approaches you can take: Server-Only Components You can use server components to ensure that feature-flagged content is only rendered on the server and not manipulable on the client: 1. Enable Component Islands: This experimental feature allows you to create server-only components that will always be rendered on the server. 
export default defineNuxtConfig({
  experimental: {
    componentIslands: true
  }
})
export default defineNuxtConfig({
  experimental: {
    componentIslands: true
  }
})
Then create .server.vue components that will only be rendered on the server Learn more about Server Components. Server-Only Pages For entire pages that should be controlled by feature flags: 
You can define a page as server only by giving it a `.server.vue` suffix. While you will be able to navigate to the page using client-side navigation, controlled by `vue-router`, it will be rendered with a server component automatically, meaning the code required to render the page will not be in your client-side bundle.
You can define a page as server only by giving it a `.server.vue` suffix. While you will be able to navigate to the page using client-side navigation, controlled by `vue-router`, it will be rendered with a server component automatically, meaning the code required to render the page will not be in your client-side bundle.
Server-Only Pages Client Fallback If you need to handle cases where server rendering might fail: 
export default defineNuxtConfig({
  experimental: {
    clientFallback: true
  }
})
export default defineNuxtConfig({
  experimental: {
    clientFallback: true
  }
})
This enables the <NuxtClientFallback> component for rendering content on the client if there's an error in SSR Client Fallback. IP-Based Feature Flags For admin-only features, you could implement IP-based restrictions: 
<template>
   <aside
       v-if="shouldShowSettings"
   >
       admin only
   </aside>
</template>

<script lang="ts" setup>
import { useIpStore } from '~/stores/ip';

const ipStore = useIpStore();
const shouldShowSettings = computed(() => ipStore.isAdminIp);
</script>
<template>
   <aside
       v-if="shouldShowSettings"
   >
       admin only
   </aside>
</template>

<script lang="ts" setup>
import { useIpStore } from '~/stores/ip';

const ipStore = useIpStore();
const shouldShowSettings = computed(() => ipStore.isAdminIp);
</script>
Stack Overflow Example Disable Vue Server Renderer Endpoint To prevent direct access to the Vue server renderer: 
export default defineNuxtConfig({
  experimental: {
    noVueServer: true
  }
})
export default defineNuxtConfig({
  experimental: {
    noVueServer: true
  }
})
No Vue Server Respect No SSR Header You can also control SSR responses with headers: 
export default defineNuxtConfig({
  experimental: {
    respectNoSSRHeader: true
  }
})
export default defineNuxtConfig({
  experimental: {
    respectNoSSRHeader: true
  }
})
Respect No SSR Header The best approach depends on your specific requirements, but using server components or server-only pages is generally the most secure way to implement feature flags since the logic stays on the server and isn't exposed to client manipulation. ---------------------- Note: you can ask me a follow up question by @ mentioning me again :speech_balloon: ----------------------
kapa.ai
kapa.aiβ€’5d ago
<@969318262787686400> Kapa.ai is still learning and improving, please let me know how I did by reacting below.

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