How can I implement a Reddit-style nested comments feature in my project?

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Asked By GamerNinja42 On

I'm working on a side project using Vite with React for the frontend and Node with Express for the backend, along with Supabase for the database. I want to add a feature that allows for nested comments, similar to what Reddit has. What are the best practices or tools I can use to achieve this? Any tutorials or resources would be really helpful!

3 Answers

Answered By TechGuruX On

Are you planning to build the commenting system from scratch? If so, your tech stack is well-equipped for a custom solution. I’ve built similar systems before using React and Node. If you'd prefer a simpler path, you might want to consider managed options like Open Web or Disqus — I haven't used them myself, though!

GamerNinja42 -

I don't know anything about Open Web and Disqus. Could you tell me more?

Answered By DevExplorer83 On

One effective method would be to use an adjacency list in Postgres/Supabase. Create a comments table that includes an ID, parent_id, post_id, and created_at field. You can fetch threads using a recursive CTE and order them by a path. If you need faster reads, consider adding a materialized path column. In your React app, you can build a map using parent_id and render the comments recursively. This should work great with your tech stack!

Answered By CodeWizard101 On

To create nested comments, you'll mainly focus on your data structure. Each comment should include a `parentId`, which indicates its parent comment (it’ll be null for top-level comments). When rendering your comments, use a recursive function to display them according to their relationships. Since you're using Supabase, which is based on Postgres, you can manage this easily with a self-referencing table. Look up some tutorials on implementing threaded comments with Postgres for some good guidance!

GamerNinja42 -

Thanks, I will look at these things!

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