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What is react-fns?

jaredpalmer/react-fns — explained in plain English

Analysis updated 2026-07-03

3,708TypeScriptAudience · developerComplexity · 2/5Setup · easy

In one sentence

A React library that wraps common browser features like scroll position, geolocation, network status, and window size into ready-to-use components so you skip the manual setup and teardown code.

Mindmap

mindmap
  root((react-fns))
    What it does
      Wraps browser APIs
      Declarative components
      No manual event wiring
    Browser APIs
      Scroll position
      Geolocation
      Network status
      Window size
    How to use
      Install via npm
      Use as component
      Or as HOC wrapper
    Context
      Render-prop era
      Pre-hooks React
      Jared Palmer project
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Code map

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filefunction / class

What do people build with it?

USE CASE 1

Add a network-status banner to a React app that shows when the user goes offline, using the built-in network status component

USE CASE 2

Build a scroll-aware navbar that changes style based on scroll position without writing scroll event listener code

USE CASE 3

Read the user's geolocation in a React component to show nearby content without managing lifecycle methods manually

USE CASE 4

Respond to window resize events in a React component to adjust layout without custom hook setup

What is it built with?

TypeScriptReactnpm

How does it compare?

jaredpalmer/react-fnsrejetto/hfsleekhub/leek-fund
Stars3,7083,7093,712
LanguageTypeScriptTypeScriptTypeScript
Setup difficultyeasyeasyeasy
Complexity2/52/51/5
Audiencedevelopergeneraldeveloper

Figures from each repo's GitHub metadata at analysis time.

How do you get it running?

Difficulty · easy Time to first run · 5min
License information was not described in the explanation.

So what is it?

react-fns is a library that wraps common browser APIs into React components and higher-order components. Browsers expose built-in capabilities through JavaScript, things like tracking scroll position, detecting network status, reading geolocation, or responding to window size changes. Normally you would wire those up manually using event listeners and lifecycle methods. react-fns packages them as ready-to-use React building blocks so you can access that information declaratively inside your component tree without writing the setup and teardown code yourself. The library is installed via npm and works with standard React projects. The author is Jared Palmer, and the project has a dedicated website with an API reference that lists all the included components. The README provided here is mostly a contributor list and does not enumerate which specific browser APIs are included. Readers who want to know exactly what the library covers should check the API reference on the project website, which is linked from the repository. The library had meaningful community traction as shown by its star count, though it was published during an earlier period in the React ecosystem when render-prop patterns and higher-order components were the common approach before hooks became standard.

Copy-paste prompts

Prompt 1
I want to display the user's current scroll position in a React component using react-fns. Show me how to install it and use the scroll component or HOC to read scroll Y.
Prompt 2
Using react-fns in my React app, how do I detect when the user's network goes offline and show a banner? Walk me through the network status component setup.
Prompt 3
I need to access geolocation in a React component with react-fns. How do I wrap my component so it receives latitude and longitude as props?
Prompt 4
Show me how to use react-fns to detect window width changes in a React component so I can conditionally render a mobile or desktop layout.

Frequently asked questions

What is react-fns?

A React library that wraps common browser features like scroll position, geolocation, network status, and window size into ready-to-use components so you skip the manual setup and teardown code.

What language is react-fns written in?

Mainly TypeScript. The stack also includes TypeScript, React, npm.

What license does react-fns use?

License information was not described in the explanation.

How hard is react-fns to set up?

Setup difficulty is rated easy, with roughly 5min to a first successful run.

Who is react-fns for?

Mainly developer.

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