跟讀練習: NestJS in 100 Seconds - 通過影片學習英語口語

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Nest.js is a Node.js framework for building scalable server-side applications with TypeScript.

Nest.js 是一個用於使用 TypeScript 構建可擴充套件服務端應用的 Node.js 框架。

It provides a suite of tools that leverage either Fastify or Express to facilitate rapid development and predictable readable code.

它提供了一套工具，可利用 Fastify 或 Express 實現快速開發，並生成可預測、易讀的程式碼。

It supports REST and GraphQL APIs out of the box, or you might use it to build a full-stack application using the model-view-controller pattern, similar to frameworks like Laravel or Ruby on Rails.

它原生支援 REST 和 GraphQL API，你也可以用它基於模型-檢視-控制器模式構建全棧應用，這與 Laravel 或 Ruby on Rails 等框架的使用方式類似。

And it contains a ton of built-in modules to work with databases, handle security, implement streaming, and anything else you can imagine doing in a server-side application.

它還包含大量內建模組，可用於處理資料庫、安全防護、實現流式傳輸，以及完成你能想到的所有服務端應用開發任務。

Nest has its own very powerful command line tool, and you can scaffold out a new project with the nest new command.

Nest 擁有自己功能非常強大的命令列工具，你可以使用 nest new 命令搭建一個新專案的基礎框架。

That provides a code base pre-configured with jest for testing, and set up with TypeScript to help us write more readable and reliable code.

In the source directory, you'll notice a controller, which is a fundamental building block of the framework.

It's responsible for handling incoming HTTP requests and returning responses back to the To implement a controller, simply add the controller decorator to a class.

Then inside the class, you can implement methods and decorate them with HTTP verbs like git, post, patch, put, etc.

By default, this will create an HTTP endpoint on the root URL, but you can pass a string to the decorator to change the route or implement dynamic route parameters.

In addition, Nest provides other decorators to control things like the status code and headers.

Then in the method itself, parameter decorators can be used to access the request parameters or body.

And finally, the return value from the method is the response body that gets sent back down to the client.

What's awesome about nest is that you can use the CLI to automatically generate more controllers to keep your code organized as it grows in complexity.

But there's more to nest than just controllers.

A provider is a class that contains shared logic throughout the entire application and can be injected as a dependency where needed.

Any class with the injectable decorator can be injected in the constructor of another class.

For example, a provider can be implemented as a guard to handle role-based user authentication.

Or it might be implemented as a pipe to efficiently validate and transform values in a controller.

And lastly, we have the module decorator, which allows code to be organized into smaller chunks where it can be lazy loaded to run faster in serverless environments.

This has been NestJS in 100 seconds.

If you want to see more short videos like this, make sure to hit the like button and subscribe.

Thanks for watching, and I will see you in the next one.

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跟讀練習: NestJS in 100 Seconds - 通過影片學習英語口語

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