The IntrinsicAttributes type does not include the property 'path' in the Preact router

I am facing a challenge while developing my website using preact router. Every time I try to add something to the router, I encounter an error stating "Property 'path' does not exist on type 'IntrinsicAttributes'." Despite this error, the site still runs, but when I change the URL to '/shop', nothing appears on the page. shop function

import { Item } from '../../Types/types'
import './item.css'
import Navbar from '../Navbar'
export default function Items(items:Array<Item>) {
    return (
    <>
    <Navbar />
    <div className='container'>
    {
    items.map( item => { 
    return ( 
    <div className='item'>
        <div>
            <h3>
                {item.name}
            </h3>
        </div>      
        <div className='itemimage'>
            <img src={item.picture} alt={item.name} />
        </div>
        <div>
            <strong>{item.price}</strong>
        </div>
    </div>
    )})
    }
    </div>
    </>
    )
}

and my router function

import Router from 'preact-router'
import {App} from '../app'
import Items from './shop/items'
export const Route = () => {
    return (
    <Router>
    <App path='/' />
    <Items path='/shop' />  
    </Router>
    )
}

I attempted to follow a tutorial on preact router, which proved to be unsuccessful. Subsequently, in my search for a solution to this problem, I found no relevant information specific to the issue with preact-router.

Answer №1

In TS, there is a built-in limitation that can be overcome by using the <Route> component from the preact-router library:

import { Route, Router } from 'preact-router'
import { App } from '../app'
import Items from './shop/items'

export const RouteX = () => {
    return (
        <Router>
            <Route path="/" component={<App />} />
            <Route path="/shop" component={<Items />} />
        </Router>
    )
}

Due to TS strictness, <Router> cannot directly take a path prop for its children components. Instead, a workaround using a wrapper is required.

Although changing the URL to '/shop' doesn't display anything on the site, it doesn't interrupt the functionality.

The reason for not displaying anything is that you are not utilizing props correctly and failing to pass data to the <Items> component.

export default function Items({ items: Array<Item> }) {
<Route path="/shop" component={<Items items={...} />} />

Since props must always be an object, make sure to destructure or access .items within your props object. Without providing data to <Items>, the component will not have any information to process.

Answer №2

Encountering the same issue, I found a solution that diverges slightly from rschristian's suggestion to utilize the Route component.

<Route path="/" component="{<SomeComponent />} />

This implementation led to the error:

Type 'Element' is not assignable to type 'AnyComponent<{ path: string; component: Element; }> & (Element | undefined)'.

The reason for this error is that Route expects an AnyComponent, which can be either a FunctionalComponent<Props> or a

ComponentConstructor<Props, any>
.

To resolve this issue, consider using one of the following approaches:

import { Route, Router } from 'preact-router'
import { App } from '../app'
import Items from './shop/items'

export const Routing = () => {
  return (
      <Router>
          {/* No props required for App, so pass only the constructor. */}
          <Route path="/" component={App} />
          {/*
              If you need to provide props, the Route will accommodate them
              However, they become optional parameters,
              resulting in no type warning if all are not specified.
          */}
          <Route path="/shop" component={Items} items={...} />
      </Router>
  )
}

Alternatively, bypassing the use of Route, you can include the path attribute in the component's props. This can be done manually:

interface ItemsProps {
    items: Item[]
    // Include the optional `path?` attribute to satisfy typescript requirements.
    path?: string
}

or utilize RoutableProps:

import { RoutableProps } from "preact-router";

interface ItemsProps extends RoutableProps {
    items: Item[]
    // RoutableProps will introduce `path?` and `default?` attributes,
    // ensure there are no conflicts present, as typescript won't flag them
}

function Items(props: ItemsProps) {
    // Implementation ...
}

With these adjustments, you can forego the Route wrapper and directly incorporate your component.

<Router>
    {/* App does not require props, so wrapping in Route remains suitable. */}
    <Route path="/" component={App} />
    {/* As Items now supports the `path` prop, typescript validation is met. */}
    <Items path="/shop" items={...} />
</Router>

This methodology has been successfully implemented with version 4.1.2 of preact-router.

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