React Typescript mapping with an existing object

Question

using the below for dynamic side navigation rendering i have sidebarprops to clear a TS error below which i read was because the object for:

  const [routes, setRouting] = useState([])

was not defined

Property 'href' does not exist on type 'never'.ts(2339)

when i setRouting i'm using a api file for data. when i use console.log(routes) comes back as an array of 8 - which is correct

Array(8)
0: {name: 'User List', href: '/people/users'}
1: {name: 'Basic Information', href: '#'}
2: {name: 'Permissions', href: '#'}
3: {name: 'Customers', href: '#'}
4: {name: 'Reports', href: '#'}
5: {name: 'Sales', href: '#'}
6: {name: 'Calendar', href: '#'}
7: {name: 'Alerts', href: '#'}

when i go to map it however i get route is undefined.

import {homeNavigations, userNavigations} from "@app/pages/api/breadcrumb-routing"

interface SidebarProps {
 links: {name: string, href: string}
 }

export default function Sidebar({links}: SidebarProps) {
const router = useRouter()
const x = router.pathname 
const [routes, setRouting] = useState([links])
const findLinks = () => { 
    debugger
    if (x.includes("people/users")){
        setRouting(userNavigations)
    }
    else setRouting(homeNavigations)
}
console.log(routes)

  useEffect(() => { 
    findLinks()
  },[]);

  return (
    <div className="hidden fixed w-28 bg-gray-700 overflow-y-auto md:block">
      <div className="w-full h-screen py-6 flex flex-col items-center">
            <div className="flex-1 mt-12 w-full px-2 space-y-1">
                {routes.map((route) => 
                    <Link href={route.href}>
                    <a
                    title={route.name}
                    className='text-white hover:bg-gray-800 hover:text-gray-300 group w- 
                    full p-3 rounded-md flex flex-col items-center text-xs font-medium'
                    >
                    <span className="mt-2">{route.name}</span>
                    </a></Link>
                )}
            </div>
        </div>
    </div>
)
}

imported data is this:

export const userNavigations = [
 {name: "User List", href: "/people/users"},
 {name: "Basic Information", href: "#"},
 {name: "Permissions", href: "#"},
 {name: "Customers", href: "#"},
 {name: "Reports", href: "#"},
 {name: "Sales", href: "#"},
 {name: "Calendar", href: "#"},
 {name: "Alerts", href: "#"} 
]

Saul Moreyra · Accepted Answer · 2022-06-07 17:12:34Z

2

try with const [routes, setRouting] = useState([...links]) and if the link are an array

interface SidebarProps {
 links: [{name: string, href: string}]
}

answered Jun 7, 2022 at 17:12

Saul Moreyra

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8 Comments

Jamie Garcia Over a year ago

still get the TS error: TypeError: links is not iterable

DerMolly Over a year ago

@JamieGarcia did you change the SidebarProps like Saul Moreyra suggested? Because in your props you only give one object with a name and href as links, while you're most likely meant to provide several…

Saul Moreyra Over a year ago

How are you creating and passing the routes array?

Jamie Garcia Over a year ago

from my breadcrumb-routing.tsx file export const userNavigations = [ {name: "User List", href: "/people/users"}, {name: "Basic Information", href: "#"}, {name: "Permissions", href: "#"}, {name: "Customers", href: "#"}, {name: "Reports", href: "#"}, {name: "Sales", href: "#"}, {name: "Calendar", href: "#"}, {name: "Alerts", href: "#"} ]

Jamie Garcia Over a year ago

ohhh!! ok i added the links to the component <Sidebar links={[]}/> that was the missing part!

|

Ensar · Accepted Answer · 2022-06-07 17:07:08Z

0

If this is your code on your editor you have misspelled it. In map function you've passed routes as parameter when you should've called it as route.

answered Jun 7, 2022 at 17:07

Ensar

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