What steps should I take to resolve the eslint issue indicating that a TypeScript props interface is not being utilized, even though it is being used?

Question

What steps should I take to resolve the eslint issue indicating that a TypeScript props interface is not being utilized, even though it is being used?

One of my components utilizes AvatarProps for its props:

https://i.sstatic.net/cZBl1.png

Below is the interface declaration for AvatarProps:

export interface AvatarProps {
  userName: string;
  userLastName: string;
  userImg?: string;
  onPress?: Function;
  backgroundColorAvatar?: string;
  editMode?: boolean;
  onPressEdit?: Function;
  editButtonIcon?: string;
  backgroundColorEditButton?: string;
  textStyle?: TextStyle;
}

Upon linting with eslint, an error message appears:

5:15  error    'AvatarProps' is defined but never used

This eslint check is triggered during commit using lefthook from a lefthook.yml file configured as follows:

 pre-commit:
  parallel: true
  commands:
    lint:
      files: git diff --name-only @{push}
      glob: "*.{js,ts,jsx,tsx}"
      run: npx eslint {files}
    types:
      files: git diff --name-only @{push}
      glob: "*.{js,ts, jsx, tsx}"
      run: npx tsc --noEmit
commit-msg:
  parallel: true
  commands:
    commitlint:
      run: npx commitlint --edit

How can I resolve this error in a clean manner?

typescript react-native eslint

Answer 1

Answer №1

Have you considered updating your component to this structure?

import React from 'react'
import type { AvatarProps, DimensionsType } from '../shared/types';

const Avatar: (props: AvatarProps) => JSX.Element = ({
        userName,
        userLastName,
        userImg,
        onPress,
        backgroundColorAvatar,
        editMode,
        onPressEdit,
        editButtonIcon,
        backgroundColorEditButton,
        textStyle,
    }) => {
        return <>
           {/* Your component goes here */}
        </>;
    };

This method provides a clearer and more descriptive way of defining the types for a functional component. Using

(props: AvatarProps) => JSX.Element

allows you to include all standard props along with any additional fields specified in AvatarProps. This enables you to incorporate child components as shown below:

import React from 'react';
import { Text } from 'react-native';

export interface AvatarProps {
    userName: string;
    userLastName: string;
}

const MyChildrenComponent = () => {
    return <></>;
};

const Avatar: (props: AvatarProps) => JSX.Element = ({ userName, userLastName, children }) => {
    return (
        <>
            {children}
            <Text>{userName + ' ' + userLastName}</Text>
            {/* Include the remaining component implementation here */}
        </>
    );
};

const SomeParentComponent = () => {
    return (
        <Avatar userName="Something" userLastName="">
            <MyChildrenComponent />
        </Avatar>
    );
};

While this approach has its drawbacks, such as not explicitly typing the function arguments (props) and the implicit nature of the children argument, it offers a structured way to define functional components. For more details, refer tothis article.

UPDATE: It's worth noting that React.FC is not necessary. You can define your component without using it like so:

const Avatar: (props: AvatarProps) => JSX.Element = ({
    userName,
    userLastName,
    userImg,
    onPress,
    backgroundColorAvatar,
    editMode,
    onPressEdit,
    editButtonIcon,
    backgroundColorEditButton,
    textStyle,
}) => {
    return <>{/* Your component implementation */}</>;
};

In this example, JSX.Element represents the return type of the component, but there are other options available for specifying the return type of a functional component.

Answer 2

Have you considered updating your component to this structure?

import React from 'react'
import type { AvatarProps, DimensionsType } from '../shared/types';

const Avatar: (props: AvatarProps) => JSX.Element = ({
        userName,
        userLastName,
        userImg,
        onPress,
        backgroundColorAvatar,
        editMode,
        onPressEdit,
        editButtonIcon,
        backgroundColorEditButton,
        textStyle,
    }) => {
        return <>
           {/* Your component goes here */}
        </>;
    };

This method provides a clearer and more descriptive way of defining the types for a functional component. Using

(props: AvatarProps) => JSX.Element

allows you to include all standard props along with any additional fields specified in AvatarProps. This enables you to incorporate child components as shown below:

import React from 'react';
import { Text } from 'react-native';

export interface AvatarProps {
    userName: string;
    userLastName: string;
}

const MyChildrenComponent = () => {
    return <></>;
};

const Avatar: (props: AvatarProps) => JSX.Element = ({ userName, userLastName, children }) => {
    return (
        <>
            {children}
            <Text>{userName + ' ' + userLastName}</Text>
            {/* Include the remaining component implementation here */}
        </>
    );
};

const SomeParentComponent = () => {
    return (
        <Avatar userName="Something" userLastName="">
            <MyChildrenComponent />
        </Avatar>
    );
};

While this approach has its drawbacks, such as not explicitly typing the function arguments (props) and the implicit nature of the children argument, it offers a structured way to define functional components. For more details, refer tothis article.

UPDATE: It's worth noting that React.FC is not necessary. You can define your component without using it like so:

const Avatar: (props: AvatarProps) => JSX.Element = ({
    userName,
    userLastName,
    userImg,
    onPress,
    backgroundColorAvatar,
    editMode,
    onPressEdit,
    editButtonIcon,
    backgroundColorEditButton,
    textStyle,
}) => {
    return <>{/* Your component implementation */}</>;
};

In this example, JSX.Element represents the return type of the component, but there are other options available for specifying the return type of a functional component.

What steps should I take to resolve the eslint issue indicating that a TypeScript props interface is not being utilized, even though it is being used?

Answer №1

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