Test with Jest: Learn Properly from Zerocho

Web developers (especially React developers) can now truly easily launch apps. With Expo, you can launch both Android and iOS apps even faster. Let's become a developer who can quickly launch apps with Expo.

You will learn about what a node is, the latest JavaScript grammar, the node API, npm, the module system, databases, testing, and more. You will create a project using five practical examples. You will also deploy a service to the cloud and convert a node project to TypeScript.

Learn about the uses, pros and cons of various design patterns while creating a drawing board with TypeScript/JavaScript. Learning the canvas API is a bonus!

We will create an SNS service similar to Twitter (X.com) using the React19 & Next15 & ReactQuery5 & Next Auth5 & MSW2 & socket.io4 & zustand stack. Finally, we will add SSR for search engine optimization!

Let's learn NestJS, which is called the Spring of Node.js, and experience the convenience of Dependency Injection. Let's learn everything from API development, comparison with Express, deployment, and testing.

Learn the basic syntax of TypeScript, how to analyze types written by others, and how to write your own types.

Are you having trouble deciding between Redux and MobX? Let's learn both first and then decide!

In this lecture, we will practice developing programming thinking skills using JavaScript. Let's start with the web game, the multiplication table, and then create a word game, number baseball, a reaction speed test, tic-tac-toe, a lottery machine, rock-paper-scissors, a card matching game, a text RPG, a minesweeper, a 2048 game, and a mole catching game.

Learn React through web games. Get familiar with Classes and Hooks, and learn additional things like Context API, React Router, Webpack, and Babel.

Data structures are essential subjects for studying algorithms! Let's learn various data structures using JavaScript!

If you are already a developer or want to become a developer but did not major in computer science and are weak in databases, gain lifelong knowledge with this one course!

If you are a developer who deals with HTTP or want to become a developer but did not major in computer science and are weak in networking, gain lifelong knowledge with this one course!

Now that you've learned the basic grammar of TypeScript, let's learn how to analyze complex types from popular libraries.

Let's create a delivery app for riders with React Native. This is a lecture by a developer who has created more than 5 apps with React Native over the past 6 years and sold them to Kakao Mobility.

Let's start serious React web development by creating it following the Slack service! From sign-up, login, room creation, to real-time chat!

Let's create a Twitter-like SNS service with React & Next & Redux & Redux Saga & Express stack. Finally, we will deploy it to AWS after SEO.

Let's apply TypeScript to Node.js, add typings to existing npm packages, or create your own TypeScript library.

Let's use React and TypeScript together by adding TypeScript to a web game made with React and React Router, Redux, and MobX.

Learn Vue.js and Vuex and Vue Router, which are used with Vue, by creating 8 simple web games.

Create a SNS service using Vue and Nuxt frameworks. Learn the full stack knowledge required for the service.

Even if you create the same function, the code of a junior developer who has just learned JavaScript syntax and that of an experienced senior developer will be quite different. Of course, even if the results are the same. The reason the latter's code is recognized is because of its well-designed structure and scalability to respond to changes. This lecture will learn about how to create such good code.

With this course, you will be able to write clean and clear test code, exactly as it is developed in practice. This lecture is for anyone curious about why test code is necessary and what constitutes good test code.

Since the front-end is where the user comes into contact, it is very important to test from the user's perspective, not the developer's perspective. Through E2E testing, verify that the user scenarios work normally and experience the transition from fear to confidence in your code!

We will teach you everything from basic concepts to situational test writing methods and advanced testing knowledge so that you can master everything about front-end unit testing.

A test lecture that you must take if you want to become a capable front-end development practitioner. Learn everything from testing basics to practical application in one go 👊

If you are a student or developer who is using or studying the Java programming language, you will learn various methods of testing your applications that you must know.

You will understand the present and future of AI technology, experience the testing process of AI models such as machine learning, and learn the role of a tester. You will comprehensively learn everything from establishing AI-based system test strategies to designing and executing test cases, and even methods for utilizing AI to support testing. This course is conducted based on ISTQB's AI Testing syllabus and provides an opportunity to perfectly prepare for the ISTQB AI Testing certification exam.

This course is for anyone who is curious about developing test automation on Android and iOS devices. This course will enable you to perform automated testing on mobile devices.

By developing a simple ReactNative app using the TDD methodology, you will learn the concepts of TDD and practice applying them to ReactNative mobile app development.

This lecture explains unit testing, UI testing, and integration testing methods in Flutter based on the official documentation.

Software quality is a habit! This course will teach you how to become the best programmer that companies want.

We provide CodeTree past questions, as well as algorithms and tips for solving them. We use C++, but since we don't use libraries, those who use other languages can also take the course. (Python code provided)

Learn how to build web applications with TDD using Spring Boot. You will learn how to maintain developer productivity and build reliable web applications with TDD.