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Showing content from https://rc.nextjs.org/docs/app/api-reference/functions/revalidatePath below:

Functions: revalidatePath | Next.js

revalidatePath allows you to purge cached data on-demand for a specific path.

Good to know:

• revalidatePath only invalidates the cache when the included path is next visited. This means calling revalidatePath with a dynamic route segment will not immediately trigger many revalidations at once. The invalidation only happens when the path is next visited.
• Currently, revalidatePath invalidates all the routes in the client-side Router Cache when used in a server action. This behavior is temporary and will be updated in the future to apply only to the specific path.
• Using revalidatePath invalidates only the specific path in the server-side Route Cache.

revalidatePath(path: string, type?: 'page' | 'layout'): void;

• path: Either a string representing the filesystem path associated with the data you want to revalidate (for example, /product/[slug]/page), or the literal route segment (for example, /product/123). Must be less than 1024 characters. This value is case-sensitive.
• type: (optional) 'page' or 'layout' string to change the type of path to revalidate. If path contains a dynamic segment (for example, /product/[slug]/page), this parameter is required. If path refers to the literal route segment, e.g., /product/1 for a dynamic page (e.g., /product/[slug]/page), you should not provide type.

revalidatePath does not return a value.

import { revalidatePath } from 'next/cache'
revalidatePath('/blog/post-1')

This will revalidate one specific URL on the next page visit.

import { revalidatePath } from 'next/cache'
revalidatePath('/blog/[slug]', 'page')
// or with route groups
revalidatePath('/(main)/blog/[slug]', 'page')

This will revalidate any URL that matches the provided page file on the next page visit. This will not invalidate pages beneath the specific page. For example, /blog/[slug] won't invalidate /blog/[slug]/[author].

import { revalidatePath } from 'next/cache'
revalidatePath('/blog/[slug]', 'layout')
// or with route groups
revalidatePath('/(main)/post/[slug]', 'layout')

This will revalidate any URL that matches the provided layout file on the next page visit. This will cause pages beneath with the same layout to revalidate on the next visit. For example, in the above case, /blog/[slug]/[another] would also revalidate on the next visit.

import { revalidatePath } from 'next/cache'
 
revalidatePath('/', 'layout')

This will purge the Client-side Router Cache, and revalidate the Data Cache on the next page visit.

'use server'
 
import { revalidatePath } from 'next/cache'
 
export default async function submit() {
  await submitForm()
  revalidatePath('/')
}

import { revalidatePath } from 'next/cache'
import type { NextRequest } from 'next/server'
 
export async function GET(request: NextRequest) {
  const path = request.nextUrl.searchParams.get('path')
 
  if (path) {
    revalidatePath(path)
    return Response.json({ revalidated: true, now: Date.now() })
  }
 
  return Response.json({
    revalidated: false,
    now: Date.now(),
    message: 'Missing path to revalidate',
  })
}

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