NodeJS Study

Javascript

Javascript is built on V8, the Javascript engine which is written in C++

Javascript - The V8 engine which is written in C++

ECMAScript - Javascript was invented first but the other browser companies developed standards for Javascript known as ECMAScript. Javascript is the actual language/ECMAScript is the standard.

V8 - Created by Google and is open-source.

A) True

B) False

V8 can be run standalone or embedded into any C++ application.

B) False

However we can use C++ code to add the file access functionality to Javascript.

Async is short for “asynchronous”. It’s easier to understand async if you first understand what “synchronous”, the opposite, means.

In programming, we can simplify the definition of synchronous code as “a bunch of statements in sequence”; so each statement in your code is executed one after the other.

This means each statement has to wait for the previous one to finish executing.

With asynchronous code execution of a lengthy process can continue while the program moves on to other processes.  Multiple processes can happen at the same time.  This is also known as 'multi-threading'.