Introduction ​

This is a zero-based JavaScript full-stack tutorial for beginners.

JavaScript is the most popular scripting language in the world because all the web pages you browse on computers, phones, and tablets, as well as countless HTML5-based mobile apps, are driven by JavaScript.

In simple terms, JavaScript is an interpreted programming language that runs in the browser.

So, the question arises: why should we learn JavaScript, especially when you have already mastered other programming languages like Java or C++?

The blunt answer is: because you have no choice. In the web world, only JavaScript can drive web pages and interact with users across platforms and browsers.

ActionScript, which was behind Flash, was once popular, but with the rise of mobile applications, no one develops mobile apps with Flash anymore, so it has become marginalized. In contrast, as HTML5 becomes increasingly popular on PCs and mobile devices, JavaScript has become more important. Furthermore, the emerging Node.js has brought JavaScript to the server side, making it a versatile language.

JavaScript was once considered a toy programming language with many flaws, so it was not valued by most backend developers. Many believe that writing JavaScript code is simple and that JavaScript is only for adding a bit of interactivity and animation to web pages.

But this is a completely wrong understanding. JavaScript is indeed easy to get started with, but its essence is not well known by most developers. Writing high-quality JavaScript code is even more challenging.

A qualified developer should be proficient in JavaScript as well as other programming languages. If you have mastered other programming languages, or if you are starting from scratch, begin learning JavaScript immediately—don’t be left behind in the web era.

You might ask, with so many online JavaScript tutorials and various books from beginner to advanced, why should I choose this tutorial?

The reason is that this tutorial:

• Is a full-stack JavaScript tutorial!
• Can be learned online for free!

Don’t hesitate any longer—start now, and take your first steps toward becoming a full-stack developer from zero experience!