React Typescript 中的接口上不存在属性

Question

I am pretty new to React but with some Angular attempts before.

I was actually trying to implement a component which accepts a data model or object as parameter

Looks like this

import react from 'react'

interface SmbListItem{
    index:number;
    primary:string;
    secondary:string;
}
   

export default function SmbList({props}:SmbListItem){
    return(
        <>

        </>
    );
}

But its saying props does not exists on SmbListItem

What I did wrong?

Also requesting a suggestion on interface or types are the best option in this situation

Answer 1

import react from 'react'

interface SmbListItem{
    index:number;
    primary:string;
    secondary:string;
}
   

export default function SmbList({index, primary, secondary}:SmbListItem){
    return(
        <>

        </>
    );
}

There is no such props defined in your Interface Props

Even if you are not using Ts and you are sure about the props you would destructure your props like this

export default function SmbList({index, primary, secondary}){
    return(
        <></>
    );
}

For Your Second Question Have a look into Types vs Interface

Answer 2

Hi @Sandeep Thomas,

First, You are trying to destructure the props parameter in the function definition, but you are not passing any props to the function. In that case, You need to use generic type function for that case.

If you're new to react-typescirpt world. Then, You need to read this first:- TypeScript Docs .

In short note:-

A generic type is a type that allows you to define a type or function with one or more placeholder types that can be filled in with specific types when the generic is used.

I found an good example for that:-

function identity<T>(arg: T): T {
  return arg;
}

let numberIdentity = identity(5);  // numberIdentity is of type number
let stringIdentity = identity("hello");  // stringIdentity is of type string

Here is example with your code:-

export default function SmbList<T extends SmbListItem>({ props }: T) {
    return <>// You code...</>;
}

The props parameter is of a type that extends the SmbListItem interface.