You don’t need to become an expert before you contribute to open-source. Many open-source projects encourage contributions from JavaScript beginners. You can check out First Timers Only for a practical guide on how to get started.

Welcome to the interactive JavaScript tutorial. This is a great short introductory course and Brad is an experienced developer who will walk you through all of this concepts in an easy to understand manner. This is a great short introductory course and Mosh is an experienced developer who will walk you through all of these concepts in an easy to understand manner.

JavaScript References

With a loop we can automate and repeat a block of code however many times we want it to run, even indefinitely. Template literals are also great because they provide an easy way to interpolate variables and JavaScript Lessons expressions into strings. Let’s now introduce another set of binary operators that you’re already familiar with from basic math. Until 2015, var was the only way we could declare a variable in JavaScript.

  • JavaScript objects are variables that contain multiple data values.
  • Now, to be able to use this syntax, the doSomething() function implementation must be a little bit special.
  • JavaScript is also now widely used outside of the browser.
  • We can pass a parameter to the resolve and reject functions, of any type we want.
  • I would like to attend the classes in Brooklyn (вместо Brooklyn вставьте район, где вы живете).
  • You can use many resources to learn JavaScript from scratch, including online courses, books, boot camps, and video tutorials.

JavaScript is also now widely used outside of the browser. The rise of Node.js in the last few years unlocked backend development, once the domain of Java, Ruby, Python, PHP, and more traditional server-side languages. Array elements don’t all have to be the same type of value. Elements can be any kind of JavaScript value — even other arrays.


Every complex statement with multiple operators in the same line will introduce precedence problems. An expression is a single unit of JavaScript code that the JavaScript engine can evaluate, and return a value. We have many different types in JavaScript, and we’ll talk about them in detail later on. My personal preference is to avoid semicolons, so my examples in the book will not include them. In JavaScript, we can write a comment on a single line using //. Everything after // is not considered as code by the JavaScript interpreter.

JavaScript Lessons

W3Schools maintains a complete JavaScript reference, including all HTML and browser objects. Try following the six points you have learned about the JavaScript learning model. After you follow the instructor and complete the project, try to pause. Think, what else can you build with the concept you learned just now?

The JavaScript language

Documentation should be your go-to resource if you want to adopt industry best practices as a JavaScript developer. An excellent JavaScript documentation you should check out is the MDN JavaScript Reference. Coding boot camps provide a structured approach to learning JavaScript from scratch.

The two types of functions are very similar, so you might ask why arrow functions were introduced. The big difference with regular functions is when they are used as object methods. Const does not mean „constant” in the way some other languages like C mean. In particular, it does not mean the value cannot change – it means it cannot be reassigned. If the variable points to an object or an array (we’ll see more about objects and arrays later) the content of the object or the array can freely change. JavaScript is one of the most popular programming languages in the world.

We want to make this open-source project available for people all around the world. This depends on several factors, including your education and experience, but the average base salary for a JavaScript developer in 2024 is in excess of $80,000. Most beginners are hungry to learn but are unsure how to learn JavaScript or which resources to use. If you don’t need the full power of an IDE, code editors are also a solid and lightweight alternative. Some popular code editors are Visual Studio Code (VS Code), Atom, and Sublime Text Editor. There are two main types of IDEs to choose from, local IDEs and cloud IDEs.

JavaScript Lessons

You are on the right track if you can think of an idea or use case to build using the concept. Next, a logical step will be to call/invoke the function. Let me introduce a conceptual model for learning JavaScript. The model consists of strategies and concepts you must embrace to learn JavaScript effectively.