Specific Rendering in NextJS 13 using TypeScript

Table of contents

1. Component Structure:

Folder Structure:

Organize your components in a structured way. For instance, you might have a /components folder to hold your reusable components and a /pages folder for specific page components in a Next.js project.

Component Creation:

Create components that are specific to their task. For instance, if you have a Card component:

// components/Card.tsx

type CardProps = {
  title: string;
  content: string;
};

const Card: React.FC<CardProps> = ({ title, content }) => {
  return (
    <div className="card">
      <h2>{title}</h2>
      <p>{content}</p>
    </div>
  );
};

export default Card;

2. Efficient Rendering:

Memoization and Optimization:

Use React’s React.memo and useMemo for memoizing components and data, respectively, to prevent unnecessary re-renders.

import React, { useMemo } from "react";

const YourComponent: React.FC = () => {
  const data = useMemo(() => {
    // Your expensive data processing or calculations
    return processedData;
  }, [dependencies]);

  return <div>{/* Render using the memoized 'data' */}</div>;
};

Conditional Rendering:

Use conditional rendering to display components or content based on specific conditions.

import React from "react";

const YourComponent: React.FC<{ isLoggedIn: boolean }> = ({ isLoggedIn }) => {
  return <div>{isLoggedIn ? <p>Welcome, User!</p> : <p>Please log in</p>}</div>;
};

3. TypeScript Usage:

TypeScript helps maintain code integrity and assists in catching errors during development.

Ensure to type your props and state within components:

interface User {
  id: number;
  name: string;
  email: string;
}

const Profile: React.FC<{ user: User }> = ({ user }) => {
  return (
    <div>
      <p>ID: {user.id}</p>
      <p>Name: {user.name}</p>
      <p>Email: {user.email}</p>
    </div>
  );
};

4. Next.js Specific Optimizations:

Incremental Static Regeneration (ISR):

Utilize ISR for pages that can be statically generated at build time and then revalidated periodically. This helps in serving up-to-date content.

export async function getStaticProps() {
  // Fetch data from an API or source
  const data = ... // fetched data

  return {
    props: {
      data,
    },
    revalidate: 60, // Regenerate after 60 seconds
  };
}

Server-Side Rendering (SSR):

For dynamic data that needs to be rendered on each request, SSR can be used. Implement getServerSideProps to fetch data and pass it to the component.

export async function getServerSideProps() {
  // Fetch data from an API or source
  const data = ... // fetched data

  return {
    props: {
      data,
    },
  };
}

By applying these techniques, you can create specific, efficient, and type-safe rendering in Next.js 13 using TypeScript, leading to better performance and maintainable code. Adjust these strategies based on your project’s requirements and structure.