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wtf is prop-types?

skevy/prop-types — explained in plain English

Analysis updated 2026-07-17 · repo last pushed 2018-05-12

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

TL;DR

A React validation library with about 30 extra prop-type checkers, like number ranges and unique arrays, that strip out automatically in production.

Mindmap

mindmap
  root((repo))
    What it does
      Extends React PropTypes
      Adds 30 validators
      Catches bugs early
      No-op in production
    Tech stack
      JavaScript
      React
    Use cases
      Validate numeric ranges
      Enforce unique arrays
      Require one of several props
    Audience
      Frontend developers
      React teams

Code map

Detail Auto

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filefunction / class

Why would anyone build with this?

REASON 1

Validate that a rating prop only accepts numbers between 1 and 5.

REASON 2

Require a layout component to receive exactly one of several size options.

REASON 3

Ensure an array prop contains only unique values with no duplicates.

REASON 4

Restrict a component's children to specific allowed React element types.

What's in the stack?

JavaScriptReact

How it stacks up

skevy/prop-types0xmukesh/docusaurus-tutoriala15n/andrewscheuermann
Stars111
LanguageJavaScriptJavaScriptJavaScript
Last pushed2018-05-122021-12-272015-01-11
MaintenanceDormantDormantDormant
Setup difficultyeasyeasymoderate
Complexity2/52/51/5
Audiencedeveloperdevelopergeneral

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

How do you spin it up?

Difficulty · easy Time to first run · 5min

Yoink these prompts

Prompt 1
Help me add a prop-types validator that checks a number is within a specific range.
Prompt 2
Show me how to use prop-types to require exactly one of several mutually exclusive props.
Prompt 3
Explain how prop-types validators become no-ops in production builds.
Prompt 4
Write a prop-types rule that ensures an array prop has no duplicate values.

Frequently asked questions

wtf is prop-types?

A React validation library with about 30 extra prop-type checkers, like number ranges and unique arrays, that strip out automatically in production.

What language is prop-types written in?

Mainly JavaScript. The stack also includes JavaScript, React.

Is prop-types actively maintained?

Dormant — no commits in 2+ years (last push 2018-05-12).

How hard is prop-types to set up?

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

Who is prop-types for?

Mainly developer.

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