What are the commonly used built-in modules in nodejs?

Node.js built-in modules provide powerful functions, including: 1. File system operations (fs); 2. HTTP server and client (HTTP, HTTPS); 3. Data encryption (encryption); 4 . Path processing (path); 5. Query string parsing (query string); 6. HTTP message parsing (HTTP message); 7. Binary data storage (buffer); 8. Streaming data processing (stream); 9. Utility functions (utilities); 10. Test case verification (assertions).

Node.js commonly used built-in modules

Node.js provides a wealth of built-in modules to provide developers with powerful functions. The following are the most commonly used built-in modules:

File system module(fs)

• Used to operate files and directories, such as reading, writing, creating and delete files.

HTTP module

• is used to create HTTP servers and clients and handle HTTP requests and responses.

HTTPS module

• is used to create HTTPS servers and clients to provide secure HTTP connections.

Encryption module

• is used to encrypt and decrypt data, supporting multiple algorithms such as AES, RSA and hash functions.

Path module

• is used to manipulate file paths, such as parsing, concatenating and formatting paths.

Query string module

• is used to parse and format the query string, that is, the part after the ? in the URL.

HTTP message module

• is used to parse and manipulate HTTP messages, including request and response headers and bodies.

The buffer module

• is used to store binary data such as images and files.

Streaming module

• is used to process streaming data, such as reading files or network connections.

Utility Module

• Provides various utility functions such as type checking, array manipulation, and time processing.

Assertion module

• Module for writing test cases and verifying expected results.

Modules are developed and maintained by the official Node.js team. They are stable and reliable and safe to use in production environments.

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