Tips For Writing Clear And Efficient TypeScript Code 💯 - Part #1
Tags: typescript, frontend, webdev, softwaredevelopment
Published: 2024-03-03 07:54:52

Producing high-quality TypeScript code that is clean, clear, and efficient is essential for building a scalable and maintainable codebase.

This guide presents 20 practical tips and code examples to enhance your TypeScript development expertise, aiding you in crafting top-notch code.

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## Use Explicit Types Instead of “any”

Minimize the use of any type whenever feasible, as it diminishes the advantages of TypeScript. Instead, define types for variables, functions, and parameters explicitly.

Do this:

![any](https://dev-to-uploads.s3.amazonaws.com/uploads/articles/w901op01iqosie2pfoe5.png)

Instead of this:

![Iany](https://dev-to-uploads.s3.amazonaws.com/uploads/articles/8uladrg8sw0mfyraxnt4.png)

---

## Enable “strict” Mode in tsconfig.json

Enabling "strict" mode in TypeScript performs extensive type checking, catching potential errors early in the development process.


![strict](https://dev-to-uploads.s3.amazonaws.com/uploads/articles/7pclfuf6av9fvfm5c9hz.png)

---

## Use Readonly Arrays

Utilize the "readonly" keyword to safeguard against unintended alterations to your objects and arrays.

Do this:

![readonly](https://dev-to-uploads.s3.amazonaws.com/uploads/articles/qbwnp78uxcs461465fp1.png)

Instead of this:

![readonly](https://dev-to-uploads.s3.amazonaws.com/uploads/articles/lemgeygz1mg21nxev1k8.png)

---

## Use Destructuring to Extract Properties

Destructuring can make your code more concise and easier to read.

Do this:

![Destructurin](https://dev-to-uploads.s3.amazonaws.com/uploads/articles/y0v5x2xs8mb36yqoxzzt.png)

Instead of this:

![Destructurin](https://dev-to-uploads.s3.amazonaws.com/uploads/articles/mnfn5ohospvrbpzqc6wr.png)

---

## Array Generics over Type Casting

Use array generics to specify the type of elements in an array instead of type casting.

Do this:

![Array Generics](https://dev-to-uploads.s3.amazonaws.com/uploads/articles/v0jwwtvqusfbdkiwjacx.png)

Instead of this:

![Array Generics](https://dev-to-uploads.s3.amazonaws.com/uploads/articles/ikzkfv53f1zs1ddnf3rg.png)

---

## Utilize Enums for Constants

Utilize enums to encapsulate a group of related constants, enhancing code clarity and ease of maintenance.

Do this:

![Enums](https://dev-to-uploads.s3.amazonaws.com/uploads/articles/gozy8dfvtgkw8u8gmax9.png)

Instead of this:

![Enums](https://dev-to-uploads.s3.amazonaws.com/uploads/articles/f0kqvikruc09u0u69gg6.png)

---

## Prefer Interface over Type Alias for Object Shapes

Employ interfaces to specify the structure of an object, thus harnessing their capacity for extension.

Do this:

![Interface](https://dev-to-uploads.s3.amazonaws.com/uploads/articles/gg03ac35i2w94akz648a.png)

Instead of this:

![Interface](https://dev-to-uploads.s3.amazonaws.com/uploads/articles/fzcfn8fkgc5jt2k3fq7m.png)

---

## Use Optional Properties for Configurable Object

Use optional properties in interfaces to allow flexibility when configuring objects.


![Optional Properties](https://dev-to-uploads.s3.amazonaws.com/uploads/articles/bmh5aqur3mhvt989ao3j.png)

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## Use TypeScript’s Utility Types

Utilize TypeScript's pre-existing utility types like Partial, Pick, and Omit to streamline your codebase and eliminate redundancy effectively.


![Utility Types](https://dev-to-uploads.s3.amazonaws.com/uploads/articles/t1sd8vahny1n8b9vr1u1.png)

---

## Use Union Types for Multiple Possible Types

Use union types to specify that a variable can hold values of multiple types.


![Union Types](https://dev-to-uploads.s3.amazonaws.com/uploads/articles/fyub4quq75139dso7yli.png)

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## Conclusion:

Writing clear and efficient TypeScript code requires practice, attention to detail, and adherence to best practices. 

By following the tips outlined in this article, you’ll be able to produce high-quality code that is easier to understand, maintain, and scale. 

**_Happy Coding!_** 🚀