Why JavaScript Became the Basic Language for Every Developer

During my work in full-stack, backend, and AI projects, I have used many programming languages: Python, C++, Java, Go, PHP, TypeScript, Rust, and others. Each language has its own strengths, but one language keeps appearing in almost every real production system. That language is JavaScript. At the beginning, I thought JavaScript was only a frontend scripting language. Later, after working on larger systems, I realized that JavaScript became something more important. It turned into a common layer that connects different parts of modern software. JavaScript is not always the best language, but it is often the language that everything depends on. When JavaScript looks simple but causes real problems Early in my career, I focused mostly on backend logic and system design. I spent more time working with databases, APIs, and server-side code, and I considered frontend work to be secondary. That assumption changed during one project where the backend was completely correct, the database quer