Streams are objects that enable you to read data or write data continuously.
There are four types of streams:
Readable – Used for reading operations
Writable − Used for write operations
Duplex − Can be used for both reading and write operations
Transform − A type of duplex stream where the output is computed based on input
Express is a flexible Node.js web application framework that provides a wide set of features to develop both web and mobile applications
The package.json file is the heart of a Node.js system. This file holds the metadata for a particular project. The package.json file is found in the root directory of any Node application or module
This is what a package.json file looks like immediately after creating a Node.js project using the command: npm init
You can edit the parameters when you create a Node.js project.
The URL module in Node.js provides various utilities for URL resolution and parsing. It is a built-in module that helps split up the web address into a readable format.
The two types of API functions in Node.js are:
Event loops handle asynchronous callbacks in Node.js. It is the foundation of the non-blocking input/output in Node.js, making it one of the most important environmental features.
The distinction between method and product. This is accomplished through the use of nextTick() and setImmediate(). next Tick() postpones the execution of action until the next pass around the event loop, or it simply calls the callback function once the event loop’s current execution is complete, whereas setImmediate() executes a callback on the next cycle of the event loop and returns control to the event loop for any I/O operations.
An event-driven programming approach uses events to trigger various functions. An event can be anything, such as typing a key or clicking a mouse button. A call-back function is already registered with the element executes whenever an event is triggered.
| Node.js Pros | Node.js Cons |
| Fast processing and an event-based model | Not suitable for heavy computational tasks |
| Uses JavaScript, which is well-known amongst developers | Using callback is complex since you end up with several nested callbacks |
| Node Package Manager has over 50,000 packages that provide the functionality to an application | Dealing with relational databases is not a good option for Node.js |
| Best suited for streaming huge amounts of data and I/O intensive operations | Since Node.js is single-threaded, CPU intensive tasks are not its strong suit |