Is Javascript a single/multi threaded language? If single threaded then how does backend calls work?

Question

Accepted Answer

Javascript is a single-threaded language, but it can handle asynchronous operations through callbacks and promises.

Javascript is single-threaded, meaning it can only execute one task at a time.
However, it can handle asynchronous operations by using callbacks, promises, and async/await.
Backend calls in Javascript are typically made using asynchronous functions, allowing the program to continue executing other tasks while waiting for the response.
For example, when making an HTTP request to a server, the Javascript code initiates the request and registers a callback function to be executed when the response is received.
This allows the program to continue executing other tasks while waiting for the response, improving overall performance and responsiveness.

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