How WordPress Delivers SEO-Friendly Static Pages Without Modern SSR

The term Modern SSR refers to use of Nodejs in backend and Traditional SSR refers to PHP in backend. 

How wordpress manages to deliver static pages using traditional ssr

Wordpress delivers the static pages through pre-rendering using php to generate HTML dynamically before sending it to browser.This means when user sends requests to a page, wordpress builds the page on the server using PHP fetches data from the database and send the fully render html to the client.

Caching in static pages

Plugins like WP Super Cache or W3 Total Cache store pre-rendered HTML pages. This reduses the queries from database and store the pre-render HTML pages and makes almost fast as SSR.

Modern framework using Modern ssr

Framework like Remix, Nextjs, Nuxtjs uses Moder ssr. Therefore it uses Nodejs in backend and receives fully rendered HTML from the server, improving performance and SEO.

How hydration works in modern ssr

In modern ssr hydration is the process where client-side JavaScript takes over a pre-rendered HTML page and makes it interactive.

1️⃣ Server Renders the Page → The server generates static HTML and sends it to the browser.
2️⃣ Browser Displays Static Page → The page loads instantly, but interactive elements (buttons, forms) don’t work yet.
3️⃣ JavaScript Loads & Hydrates the Page → React (or Vue) reattaches event listeners and makes the page fully interactive.

export async function getServerSideProps() {
  const res = await fetch('https://api.example.com/products');
  const products = await res.json();

  return { props: { products } };
}

export default function ProductsPage({ products }) {
  return (
    <div>
      <h1>Products</h1>
      <ul>
        {products.map((product) => (
          <li key={product.id}>{product.name}</li>
        ))}
      </ul>
    </div>
  );
}