What methods does React Router use to extract typed parameters from path strings?

Question

What methods does React Router use to extract typed parameters from path strings?

(This question is about understanding functionality, not asking for a step-by-step guide)

While using React Router, I noticed that Vscode IntelliSense can offer strongly-typed suggestions when I input parameters in a route like this:

<Route path='/users/:userId?' render={props => <UserManager selectedId={props.}/>} />

By typing props.match.params., any string entered in the path attribute, such as :text, becomes a strongly typed parameter accessible through the params property (and an optional parameter if followed by a question mark):

https://i.sstatic.net/Wj9cA.jpg

How does Vscode/TypeScript/React Router create a strong-typed variable from a plain user-inputted string?

javascript typescript visual-studio-code react-router intellisense

Answer 1

Answer №1

To understand how to create generic constraints between two properties of an object, refer to this question.

Explanation is provided in the comments:

import React from 'react'

// Code block with type definitions and explanations

const jsx = <Route path="/dashboard/:siteId/user:userId" params={{ siteId: 'hello', userId: 'world' }} /> // ok
const jsx_ = <Route path="/dashboard/:siteId/user:userId" params={{ siteId: 'hello' }} /> // error, missing userId prop

Check out this Playground

This example showcases how a similar react component can be built. While not identical to react router behavior, it serves as a helpful guide.

Keep in mind that this is a simplified version compared to actual implementations. For a more detailed implementation, you can refer to this link.

Answer 2

To understand how to create generic constraints between two properties of an object, refer to this question.

Explanation is provided in the comments:

import React from 'react'

// Code block with type definitions and explanations

const jsx = <Route path="/dashboard/:siteId/user:userId" params={{ siteId: 'hello', userId: 'world' }} /> // ok
const jsx_ = <Route path="/dashboard/:siteId/user:userId" params={{ siteId: 'hello' }} /> // error, missing userId prop

Check out this Playground

This example showcases how a similar react component can be built. While not identical to react router behavior, it serves as a helpful guide.

Keep in mind that this is a simplified version compared to actual implementations. For a more detailed implementation, you can refer to this link.

What methods does React Router use to extract typed parameters from path strings?

Answer №1

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