Drupal and React: Achieving SSR with hydrateRoot

Staff Reporter

Abhinav Singh's blog post on LinkedIn explores integrating Drupal with React for server-side rendering (SSR) using hydrateRoot. The tutorial addresses performing SSR from PHP without JavaScript and subsequently hydrating it on the front end with React. Abhinav explains that SSR in a pure JavaScript environment is straightforward, but complications arise when Drupal is the backend because JavaScript cannot be executed there.

The key rule for using hydrateRoot is ensuring the server-rendered DOM element is identical to the client-rendered one. Abhinav demonstrates how to achieve this by copying the client-rendered element from the browser's developer tools into the Drupal Twig file without formatting it. This is crucial to prevent hydration errors.

He provides an example of hydrating a paragraph in Drupal and includes JavaScript code to render and test the component. Abhinav concludes that while this method works, it is prone to human error and invites suggestions for alternative approaches in the comments.

Reference: Drupal X React Server Side rendering with hydrateRoot by Abhinav Singh (13 July 2024)

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