Why doesn't JavaScript support multithreading? Last Updated : 08 Jun, 2023 Comments Improve Suggest changes Like Article Like Report What is Multithreading? Multithreading is a sort of execution model that enables different threads to exist inside the setting of a process with the end goal that they execute autonomously yet share their process resources. A thread keeps up a rundown of data important to its execution including the priority schedule, exception handlers, a set of CPU registers, and stack state in the location space of its hosting process. Threads in JavaScript: JavaScript is a single threaded language which does not support multithreading. All the operations in JavaScript are non-blocking and are executed in the event loop. This single-threaded nature along with event loop allows JavaScript to handle concurrent operations at once. Why doesn’t JavaScript support multithreading? JavaScript is a scripting language so it was only made to support the browsers. The borwsers in the past were not fast as compared to modern day browsers so JavaScript was kept single-threaded so that operations in the browsers does not get blocked due to multiple requests. The asynchronous behaviour of JavaScript helps prevent event blocking. Though modern day web browsers are fast and can even handle multi-thread operations but JavaScript is still single-threaded. How to use JavaScript in a multithreaded manner? Though there is a way in which we can write JavaScript in a multi-threaded manner which is by using the web workers. Web workers were introduced in 2009 when browsers became faster but there are some limitations to web workers as Web Workers are not allowed to interact with UI. Also, we can only pass values as copy in the function and use of global variables is not allowed To learn more about web workers in JavaScript, refer to the article Web Workers in JavaScript Comment More infoAdvertise with us Next Article Why doesn't JavaScript support multithreading? A AbhinandanBhatnagar Follow Improve Article Tags : JavaScript Web Technologies Similar Reads Power of Web Workers - Multithreading in JavaScript Web Workers are a browser API that allows JavaScript to execute tasks in parallel on a separate thread. It enables the main thread to continue running without being blocked, allowing the user interface to remain responsive. A Web Worker runs in a separate global context, meaning it has its own JavaS 6 min read Mutlithreading in JavaScript Multithreading is the ability of any program to execute multiple threads simultaneously. As we know JavaScript is a single-threaded programming language, which means it has a single thread that handles all the execution sequentially. Single-threaded means one line of code run at once. Originally, Ja 3 min read JavaScript Atomics store() Method What is Atomics? The Atomics is an object in JavaScript which provides the ability to perform atomic operations as static methods.Just like the Math object in JavaScript all the properties and methods of Atomics are also static.Atomics are used with SharedArrayBuffer(generic fixed-length binary data 3 min read JavaScript Atomics notify() Method The Atomics.notify() is an in-built method in JavaScript that is used to notify some agents that are sleeping in the wait queue. The Atomics.notify() method returns a number of woken-up agents. The integer-typed array, index, and count are passed as an argument to the function. Syntax: Atomics.noti 2 min read Top 5 Reasons to Learn JavaScript Being a developer can be overwhelming when you need to learn multiple languages to build different kinds of applications. Often, you must learn more than one language to build a single application or to create various applications. For front-end development, you need one language, and for back-end d 7 min read Like