2023-05-23
3211
#react native
Hussain Arif
62541
May 23, 2023 â‹… 11 min read

A deep dive into React Native FlatList

Hussain Arif Hussain is a CS student in Pakistan whose biggest interest is learning and teaching programming to make the world a better place.

Recent posts:

designing llm first products

Designing LLM-first products, not just features

Everyone’s building chat-first AI products. And most of them suck. Here’s how to break the mold and ship LLM-native software that actually solves problems.

Rosario De Chiara
May 30, 2025 â‹… 4 min read
Build A React AI Image Generator With Hugging Face Diffusers

Build a React AI image generator with Hugging Face Diffusers

Build a React-based AI image generator app offline using the Hugging Face Diffusers library and Stable Diffusion XL.

Andrew Baisden
May 29, 2025 â‹… 10 min read
Gemini 2.5 and the future of AI reasoning for frontend devs

Gemini 2.5 and the future of AI reasoning for frontend devs

Get up to speed on Google’s latest breakthrough with the Gemini 2.5 model and what it means for the future of frontend AI tools.

Chizaram Ken
May 29, 2025 â‹… 5 min read
Exploring The Top Rust Web Frameworks

Exploring the top Rust web frameworks

In this article, we’ll explore the best Rust frameworks for web development, including Actix Web, Rocket, Axum, warp, Leptos, Cot, and Loco.

Abiodun Solomon
May 28, 2025 â‹… 11 min read
View all posts

7 Replies to "A deep dive into React Native <code>FlatList</code>"

    1. Anonymous functions for the ‘keyExtractor’ prop are alright. This is because they don’t get re-rendered repeatedly, so there’s no performance costs

  1. Certainly everything but a deep dive.. you just showed an example of usage. As for FlatList, the most buggy component in all React Native, I highly recommend you not to talk about FlatList as a “rock solid” component. I was excepting a deep dive into the component itself and how to avoid at least the rendering issues, the images not loading within the FlatList items etc.. just a very beginner’s guide, which is great for beginners, but change the title, it’s totally misleading.

    1. Hi Vahradrim, thank you for taking the time to read my post! I didn’t research properly and that’s my fault.
      I’ve now updated my article and would like to know your thoughts.

  2. Hi, what if the array that im showing is extracted from firebase and I don’t know what is the key value pair of the object, how do we use FlatList as the above examples it is known the keys of each key-value pair?

  3. Hey, thanks for the article. Here is another interesting issue with flat list.
    I have a View, containing flatlist inside a react-navigation tab bar.
    Everything works fine, but when I add a button before flatlist, like this

    ..
    ..

    the last element in the flatlist seems to be hidden behind the tab bar.
    Trying to figure out what is wrong.
    So would be interesting to read about best practises, like don’t use other elements except flatlist on a screen etc.

Leave a Reply