What is the step-by-step guide for implementing an access limiter on an interface

When attempting to modify the access level on an interface in Typescript, I encountered an error stating 'cannot appear in type member.' After removing the access limiter on the interface and implementing it, I tried changing the access limiter on the class.

interface car {
  private speed: number;
}

Unfortunately, this did not work as expected.

interface car {
    speed: number;
}

This change did work successfully.

class MyCar implements car {
    private speed: number;
}

However, this did not work as intended.

class MyCar implements car {
    public speed: number;
}

This modification worked properly.

Is it possible for an interface to have an access limiter? Or can an implemented interface restrict access with private or protected levels on a class?

Answer №1

In object-oriented programming, interfaces do not support access modifiers. The purpose of an interface is to outline the public members that a class exposes, while private members are considered implementation details that should be hidden from the public interface.

This limitation is consistent across various modern OOP languages such as C# and Java which also do not permit access modifiers on interfaces.

Similar questions

If you have not found the answer to your question or you are interested in this topic, then look at other similar questions below or use the search

Switch up the Angular base URL using ngx-translate

I successfully integrated ngx-translate into my Angular project. Now, I want to dynamically change the base href based on the language selected from the header menu. Currently, the URL appears as: "localhost:4200". However, upon launching the project, it ...

The error message "Type 'null' cannot be assigned to type 'Element | DocumentFragment'" occurs when using Nextjs/React createPortal

I am completely new to typescript. Currently, I'm working on a project that has a lot of pre-configured react components in JavaScript files (.js). My task now is to convert everything to TypeScript (.tsx) without triggering any ESLint errors. Unfort ...

Error message in Ionic 2: "Property is not found on type"

Currently, I am working on a project in Ionic 2 and have encountered a stumbling block with a seemingly simple task. My issue lies with a Textbox where I aim to input text that will then be displayed. I found some code on a website (http://www.tizag.com/j ...

Formatting decimals with dots in Angular using the decimal pipe

When using the Angular(4) decimal pipe, I noticed that dots are shown with numbers that have more than 4 digits. However, when the number has exactly 4 digits, the dot is not displayed. For example: <td>USD {{amount| number: '1.2-2'}} < ...

Creating a TypeScript schema with nested maps and arrays using Dynamoose

I'm currently in the process of developing a schema for a specific example: { "foods": [ { "fruits": [{ "apple": { "color": "red", ...

"Slow loading times experienced with Nextjs Image component when integrated with a map

Why do the images load slowly on localhost when using map, but quickly when not using it? I've tried various props with the Image component, but none seem to solve this issue. However, if I refresh the page after all images have rendered once, they ...

Bring in TypeScript property from an external scope into the current scope

I am encountering an issue with my TypeScript code. Inside the anonymous functions, I am unable to change the properties of the class because they are out of scope. Is there a way to pass them in so that they can be modified? class PositionCtrl { ...

What is the best way to utilize v-model with an array of strings in a Vuex store when using v-for

Encountered an issue while trying to set a value in an Array within the Vuex Store: VueCompilerError: v-model cannot be used on v-for or v-slot scope variables because they are not writable. Seeking alternatives to achieve this without creating a local co ...

I possess a table that showcases MatIcon buttons. Upon clicking on a button, two additional buttons should appear at the bottom of the table

I am working on a table that contains mat-icon-buttons. When the button is clicked, it should display 2 additional buttons at the end of the table. Upon clicking the first button, its color changes from primary to red, and I would like to add two more butt ...

PlatypusTS: Embracing Inner Modules

Incorporating angular, I have the capability to fetch object instances or import modules using the $injector in this manner: export class BaseService { protected $http: angular.IHttpService; protected _injector: angular.auto.IInjec ...

Is there a method to incorporate absolute paths in SCSS while working with Vite?

Currently, I am experimenting with React + Vite as webpack seems to be sluggish for me. My goal is to create a project starter, but I am facing difficulties in getting SCSS files to use absolute paths. Despite including vite-tsconfig-paths in my vite.confi ...

Implement a call feature using ReactJS

My service method involves making a PUT call to an API with an ID parameter. However, I am facing issues with hitting the .put URL. Can someone please verify if this is the correct approach? ENDPOINTS = { SAMPLE: "/sample", }; Below is my ...

The reference to "joiner" property cannot be found in the type "{}"

Struggling with setting state in tsx and encountering an error when trying to access JSON data. Property 'joiner' does not exist on type '{}'. TS2339 Below is the component code (trimmed for brevity) import Player from '../c ...

What is the reason behind Flow's reluctance to infer the function type from its return value?

I was anticipating the code to undergo type checking within Flow just like it does within TypeScript: var onClick : (() => void) | (() => boolean); onClick = () => { return true; } However, I encountered this error instead: 4: onClick = () => ...

Create seamless communication between Angular application and React build

I am currently engaged in a project that involves integrating a React widget into an Angular application. The component I'm working on functions as a chatbot. Here is the App.tsx file (written in TypeScript) which serves as the entry point for the Rea ...

The impact of redefining TypeScript constructor parameter properties when inheriting classes

Exploring the inner workings of TypeScript from a more theoretical perspective. Referencing this particular discussion and drawing from personal experiences, it appears that there are two distinct methods for handling constructor parameter properties when ...

Angular Routing can be a powerful tool for managing multiple article posts in an efficient and organized way

I am in the process of building a website with Angular that features numerous articles. Whenever a user clicks on an article, I want it to navigate to a new URL using routing. To achieve this, I have created a new Article component and here is how my app- ...

Deactivate the rows within an Office UI Fabric React DetailsList

I've been attempting to selectively disable mouse click events on specific rows within an OUIF DetailsList, but I'm facing some challenges. I initially tried overriding the onRenderRow function and setting CheckboxVisibility to none, but the row ...

When attempting to create a fresh NestJS module, a message pops up stating: "An error occurred while

Currently running MacOS Monterey with the M1 chip as my OS. I installed NestJS CLI using the command: sudo npm install -g @nestjs/cli When creating a new Nest project with nest new message, everything goes smoothly. However, when attempting to generate a ...

Determine the data type based on the object property

Can a versatile function be created to automatically determine the type based on an "external" object property? Consider the following scenario: const resolversMap: { overallRankingPlacement: (issuer: number, args: Record<string, any>, context: Re ...