whatisgithub

What is react-side-effect?

gaearon/react-side-effect — explained in plain English

Analysis updated 2026-07-17 · repo last pushed 2023-03-04

★ 1,214JavaScriptAudience · developerComplexity · 2/5DormantSetup · easy

In one sentence

A React utility that collects props from nested components across your whole app to trigger a single combined side effect, like updating the page title.

Mindmap

mindmap
  root((repo))
    What it does
      Collects props app-wide
      Merges nested settings
      Triggers one side effect
    Tech stack
      React
      JavaScript
    Use cases
      Update document title
      Manage page metadata
      Server-side rendering support
    Audience
      React developers
    How it works
      Deepest component wins
      Single combine function
      Testing utilities included

Code map

Detail Auto

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filefunction / class

What do people build with it?

USE CASE 1

Wrap page sections in a DocumentTitle component so nested pages can override the browser tab title.

USE CASE 2

Manage document metadata like social media tags declaratively from anywhere in the component tree.

USE CASE 3

Capture aggregated side-effect state during server-side rendering so the initial HTML has correct metadata.

USE CASE 4

Test that your app's side effects (like title changes) work correctly using the built-in testing utilities.

What is it built with?

ReactJavaScript

How does it compare?

gaearon/react-side-effectpatrickjs/angular-websocketyyx990803/zoomerang
Stars1,2141,2101,220
LanguageJavaScriptJavaScriptJavaScript
Last pushed2023-03-042018-05-162021-07-19
MaintenanceDormantDormantDormant
Setup difficultyeasyeasyeasy
Complexity2/52/51/5
Audiencedeveloperdeveloperdeveloper

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

How do you get it running?

Difficulty · easy Time to first run · 30min

Copy-paste prompts

Prompt 1
Show me how to build a DocumentTitle component using react-side-effect that lets nested pages override the title.
Prompt 2
Explain how react-side-effect merges props from multiple nested component instances into one side effect.
Prompt 3
How do I use react-side-effect with server-side rendering to set metadata before sending HTML to the browser?
Prompt 4
Write a test using react-side-effect's testing utilities to verify a side effect fires with the expected props.

Frequently asked questions

What is react-side-effect?

A React utility that collects props from nested components across your whole app to trigger a single combined side effect, like updating the page title.

What language is react-side-effect written in?

Mainly JavaScript. The stack also includes React, JavaScript.

Is react-side-effect actively maintained?

Dormant — no commits in 2+ years (last push 2023-03-04).

How hard is react-side-effect to set up?

Setup difficulty is rated easy, with roughly 30min to a first successful run.

Who is react-side-effect for?

Mainly developer.

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