How much javascript should i know?

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When it comes to learning JavaScript, many aspiring developers wonder how much knowledge of the language is necessary. JavaScript is a versatile programming language that is widely used for web development, and having a solid understanding of it can open up a world of opportunities. In this article, we will explore the question of how much JavaScript one should know and provide insights into the different levels of proficiency that can be beneficial for different purposes.

Foundational Knowledge

Before diving into the specific levels of JavaScript proficiency, it is important to have a solid foundation in the basics of the language. This includes understanding variables, data types, operators, control flow, functions, and basic object-oriented programming concepts. Without this foundational knowledge, it can be challenging to grasp more advanced JavaScript concepts.

Beginner Level

At the beginner level, it is essential to have a good understanding of JavaScript syntax and basic programming concepts. This includes knowledge of variables, data types, loops, conditional statements, and functions. With this level of proficiency, you can start building simple interactive web applications and add basic interactivity to websites.

Materials used: Online tutorials, introductory JavaScript books, interactive coding platforms.

Intermediate Level

Once you have a solid grasp of the basics, it is time to move on to the intermediate level. At this stage, you should have a deeper understanding of JavaScript concepts such as objects, arrays, higher-order functions, closures, and asynchronous programming using promises and callbacks. This level of proficiency allows you to build more complex web applications, work with APIs, and manipulate data.

Materials used: Intermediate JavaScript books, online courses, coding exercises, practice projects.

Advanced Level

For those who want to become JavaScript experts, reaching the advanced level is crucial. At this stage, you should have a comprehensive understanding of advanced JavaScript topics such as prototypal inheritance, functional programming, modules, and ES6+ features. Advanced JavaScript developers are capable of building large-scale applications, optimizing performance, and solving complex programming challenges.

Materials used: Advanced JavaScript books, in-depth online courses, participation in open-source projects, real-world application development.


Beyond the advanced level, JavaScript offers various specialization paths that you can explore based on your interests and career goals. Some popular specializations include front-end development, back-end development using Node.js, mobile app development using frameworks like React Native, data visualization, game development, and more. Each specialization requires additional knowledge and expertise in specific libraries, frameworks, and tools.


In conclusion, the amount of JavaScript you should know depends on your goals and aspirations as a developer. For beginners, having a solid foundation in the basics is crucial, while intermediate and advanced levels of proficiency allow for more complex web development and specialization in specific areas. It is important to continue learning and staying updated with the latest JavaScript trends and advancements to remain competitive in the ever-evolving tech industry.