Multiple root layouts with route groups in NextJS - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is a root layout in Next.js App Router?

A root layout is a special file named layout.js placed at the root of the app directory or inside route groups. It defines the common UI structure shared by all pages under its folder, like headers or footers.

intermediate

How do route groups help organize layouts in Next.js?

Route groups let you group routes without affecting the URL path. You can create multiple root layouts by placing <code>layout.js</code> files inside different route groups, allowing different UI structures for different parts of your app.

beginner

How do you create a route group in Next.js App Router?

You create a route group by wrapping folder names in parentheses, like (admin). This folder groups routes but does not add to the URL path.

intermediate

What happens if you have multiple root layouts in different route groups?

Each route group can have its own root layout. When you visit a route inside that group, Next.js uses that group's root layout, letting you have different page structures for different sections of your app.

beginner

Why use multiple root layouts with route groups in Next.js?

Using multiple root layouts helps keep your app organized and lets you customize the look and feel for different parts, like having a special admin layout separate from the main site layout.

What folder name syntax creates a route group in Next.js App Router?

A Folder name wrapped in parentheses, e.g., (group)

B Folder name starting with underscore, e.g., _group

C Folder name with dash, e.g., group-folder

D Folder name in uppercase, e.g., GROUP

Route groups use parentheses around folder names to group routes without changing the URL.

Where do you place a root layout file in a route group?

A Only at the root app folder

B Inside the route group folder as layout.js

C Inside the pages folder

D In the public folder

Each route group can have its own layout.js file placed inside the group folder.

What effect do route groups have on the URL path?

A No effect; they do not add to the URL

B They add their name to the URL

C They remove the last segment of the URL

D They redirect to the root URL

Route groups organize routes but do not change the URL structure.

Why might you want multiple root layouts in a Next.js app?

A To reduce the number of files

B To speed up page loading

C To disable routing

D To have different page structures for different app sections

Multiple root layouts let you customize UI for different parts like admin vs main site.

Which file name is used for root layouts in Next.js App Router?

A app.js

B index.js

C layout.js

D root.js

The root layout file is always named layout.js.

Explain how multiple root layouts work with route groups in Next.js App Router.

Think about how you can have different page designs for different parts of a website without changing the URL.

Describe the benefits of using multiple root layouts with route groups in a Next.js project.

Consider how separating admin pages from user pages visually and structurally helps developers and users.