Gain insights into advanced TypeScript skills. Delve into enhancing reducers, generics, React's Context API, and explore TypeScript 5.0. Prepare to build robust, scalable applications confidently.

typescript.tar.gz

reducers-simple

reducers-complete

type-assertion

type-assertion-build

context-main

create-context

polymorphic-button

polymorphic-input

polymorphic-polymorphic

typescript 5.3.3

This course empowers learners with advanced skills in TypeScript. This course will help you master TypeScript concepts and techniques, equipping you with the knowledge to build robust, scalable, and maintainable applications.

The course covers various topics, including optimizing reducers for improved type safety and efficient state management. Next, it explores generics in TypeScript and tackles challenges with React’s Context API. You will also gain insights into extending DOM elements and crafting polymorphic components. Lastly, you will explore the latest advancements in TypeScript 5.0.

After completing this course, you will gain the skills and knowledge to emerge as proficient TypeScript developers, confident in your ability to tackle complex development challenges. Whether working on frontend or backend development, you will be well-prepared to navigate modern web development with TypeScript.

Unleashing the Power of TypeScript

In the Context API, what are the two properties of a `Context` object?

In the Context API, what are the two properties of a <code>Context</code> object?

Which hook is commonly used to access the context’s value in React functional components?

Which hook is commonly used to access the context’s value in React functional components?

Increased complexity in code understanding

Loss of type safety and autocomplete benefits

What is the downside of completely opting out of TypeScript and using `any` in the code?

```typescript
export const ColorContext = createContext<any>(null);
export const ColorProvider = ({ children }: PropsWithChildren) => { const [hexColor, setHexColor] = useState('#e56e24');
 return (
 <ColorContext.Provider value={{ hexColor, setHexColor }}>
 {children}
 </ColorContext.Provider>
); };
```

What is the downside of completely opting out of TypeScript and using <code>any</code> in the code?
<pre><code class="language-typescript">export const ColorContext = createContext&lt;any&gt;(null);
export const ColorProvider = ({ children }: PropsWithChildren) =&gt; { const [hexColor, setHexColor] = useState('#e56e24');
 return (
 &lt;ColorContext.Provider value={{ hexColor, setHexColor }}&gt;
 {children}
 &lt;/ColorContext.Provider&gt;
); };
</code></pre>

It assumes the context is of type `null`.

How does TypeScript handle situations where the context is not `null`?

How does TypeScript handle situations where the context is not <code>null</code>?

A tool for fetching data from external APIs


A tool for easy sharing of data throughout a component tree


An efficient method for styling React components


A mechanism for routing in React applications


What does the Context API in React provide?

What does the Context API in React provide?

What problem arises due to the context value potentially being `undefined`?

What problem arises due to the context value potentially being <code>undefined</code>?

To indicate that the array is constant and won’t change

To assert the type of individual array elements

What is the purpose of using as const in this specific context?
```tsx
return [useContext, Context.Provider] as const;
```

What is the purpose of using as const in this specific context?
<pre><code class="language-tsx">return [useContext, Context.Provider] as const;
</code></pre>

To tell TypeScript what kind of value(s) it can expect

What is the most challenging problem when using Context API with TypeScript?


What is the most challenging problem when using Context API with TypeScript?

Test yourself on what you’ve learned about Context API in this chapter.

Getting Started

Simplifying Reducers in React

A Gentle Introduction to Generics

Navigating the Perils and Pitfalls of Using React’s Context API

Extending DOM Elements and Creating Polymorphic Components

A Guided Tour of the Three Biggest Features in TypeScript 5.0

TypeScript Mastery: Enhancing Code Quality and Scalability

Conclusion

Quiz: Perils and Pitfalls of Using React’s Context API