What is Node.js?
- Node.js is an open source server environment
- Node.js is free
- Node.js runs on various platforms (Windows, Linux, Unix, Mac OS X, etc.)
- Node.js uses JavaScript on the server
Why Node.js?
Node.js uses asynchronous programming!
A common task for a web server can be to open a file on the server and return the content to the client.
Here is how PHP or ASP handles a file request:
- Sends the task to the computer's file system.
- Waits while the file system opens and reads the file.
- Returns the content to the client.
- Ready to handle the next request.
Here is how Node.js handles a file request:
- Sends the task to the computer's file system.
- Ready to handle the next request.
- When the file system has opened and read the file, the server returns the content to the client.
Node.js eliminates the waiting, and simply continues with the next request.
Node.js runs single-threaded, non-blocking, asynchronous programming, which is very memory efficient.
What Can Node.js Do?
- Node.js can generate dynamic page content
- Node.js can create, open, read, write, delete, and close files on the server
- Node.js can collect form data
- Node.js can add, delete, modify data in your database
What is a Node.js File?
- Node.js files contain tasks that will be executed on certain events
- A typical event is someone trying to access a port on the server
- Node.js files must be initiated on the server before having any effect
- Node.js files have extension ".js"
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W3schools is a great resource for looking up how to write a specific piece of code, but it doesn't have the flow or continuity that the other courses do. Basically, as others keep mentioning, W3schools is good for syntax, but it doesn't really teach you to think like a developer.
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W3Schools is a freemium educational website for learning coding online. Initially released in 1998, it derives its name from the World Wide Web but is not affiliated with the W3 Consortium. W3Schools offers courses covering many aspects of web development. W3Schools also publishes free HTML templates.
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Which is better, Codecademy or W3Schools? ›
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Is W3Schools a good place to learn SQL? ›
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W3Schools is a tech training provider offering a 24-week, part-time, live online, Web Development Bootcamp.
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Is W3 free? ›
W3schools is and will always be a completely free developer resource.
Who is the CEO of W3Schools? ›
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Is W3 free to use? ›
W3. CSS is free to use. No license is necessary.
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