🚀 Exciting TypeScript Journey: Unveiling the Power of Union Types! 🚀
👋 Let’s dive into the TypeScript wonderland today and explore Union Types!
🤔 Imagine you have a variable that can be more than one type.
⚙️ What exactly are Union Types?
In a nutshell, they allow a variable to have multiple types, giving you the flexibility to handle various scenarios without compromising on type safety.
🙄 How to represent Union Type?
In Typescript, we use | (OR) symbol for representing Union Type.
👀 Have a look at this code -
type Result = string | number;
const handleResult = (result: Result) => {
// Now result can be a string or a number!
// TypeScript ensures we handle both cases gracefully.
};😎 Why are they so cool?
👉 Versatility: Union Types let you handle a diverse set of inputs without resorting to ‘any’ type.
👉 Readability: Code becomes more self-explanatory and readable, like a conversation with your code.
👉 API Responses: When your API can throw different types of responses, Union Types ensure you’re ready for any twist while running the application.
👉 Event Handling: Perfect for handling diverse events in an application.
💡 Real-world Example:
Let’s say you’re working on a function that can accept either a string or an array.
💥 Boom! Union Types make it effortlessly possible without compromising type safety.
function processData(data: string | string[]): void {
// Your logic here
}🕵️♂️ Type Guards to the Rescue:
👉 Dealing with Union Types also introduces us to the intriguing world of type guards.
👉 These nifty guards help TypeScript narrow down the actual type within the Union, making your code smarter and more reliable.
👉 Helpful in Type-checks at Runtime.
function processData(data: string | string[]): void {
if (typeof data === 'string') {
// Handle string case
} else {
// Handle array case
}
}🚦 Combining Types for a Symphony:
Think of Union Types as musical notes. When combined correctly, they create a beautiful symphony in your code.
🎵 Let your creativity flow and compose elegant solutions!
Excited about Union Types?😁
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