You are currently viewing documentation for the canary channel of Next.js.
revalidateTag
revalidateTag
allows you to purge cached data on-demand for a specific cache tag.
Good to know:
revalidateTag
is available in both Node.js and Edge runtimes.revalidateTag
only invalidates the cache when the path is next visited. This means callingrevalidateTag
with a dynamic route segment will not immediately trigger many revalidations at once. The invalidation only happens when the path is next visited.
Parameters
revalidateTag(tag: string): void;
tag
: A string representing the cache tag associated with the data you want to revalidate. Must be less than or equal to 256 characters. This value is case-sensitive.
You can add tags to fetch
as follows:
fetch(url, { next: { tags: [...] } });
Returns
revalidateTag
does not return a value.
Examples
Server Action
app/actions.ts
'use server'
import { revalidateTag } from 'next/cache'
export default async function submit() {
await addPost()
revalidateTag('posts')
}
Route Handler
app/api/revalidate/route.ts
import type { NextRequest } from 'next/server'
import { revalidateTag } from 'next/cache'
export async function GET(request: NextRequest) {
const tag = request.nextUrl.searchParams.get('tag')
revalidateTag(tag)
return Response.json({ revalidated: true, now: Date.now() })
}
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