Co-Authored By:
Asked by: Celino Peças
technology and computing web developmentIs JavaScript blocking or nonblocking?
Simply so, why JavaScript is non blocking?
JavaScript engine is single threaded so the language itself is synchronous and hence blocking in nature. However, a feature called “event loop” is provided by the environment where javascript is running which provides capability for asynchronous execution providing non-blocking functionality.
Subsequently, question is, is JavaScript asynchronous by default?
How to deal with asynchronous code in JavaScript. JavaScript is synchronous by default and is single threaded. This means that code cannot create new threads and it will execute your code block by order after hoisting.
Javascript is a single threaded language. This means it has one call stack and one memory heap. As expected, it executes code in order and must finish executing a piece code before moving onto the next. Once those tasks are finished by the browser, they return and are pushed onto the stack as a callback.