Is JavaScript a multi-threaded programming language?

JavaScript is originally a single-threaded programming language, which means that code is executed in one thread. However, in modern environments such as browsers and Node.js, mechanisms for asynchronous task execution are implemented, for example, through Web Workers or asynchronous callbacks, which allow operations to run in parallel but do not make the language multi-threaded in the traditional sense. Therefore, JavaScript is a single-threaded language with capabilities for asynchronous and parallel execution through separate mechanisms.