Can you explain the execution context in JavaScript?

Can you explain the execution context in JavaScript?

Sure! The execution context is an abstract concept that holds information about the environment within which JavaScript code is executed. It includes the scope, the value of 'this', and the variables that are accessible at that point.

What are the different types of execution contexts?

There are three main types of execution contexts: global context, function context, and eval context. The global context is where your code starts executing, function context is created whenever a function is invoked, and eval context is created by the eval function.

How does the execution context affect variable scope?

The execution context determines the scope of variables. Variables defined in a function context are not accessible outside that function, while global variables can be accessed anywhere in the code.

Can you give an example of how execution context works?

Certainly! When a function is called, a new execution context is created. For example, if you have a function that defines a variable, that variable will only be accessible within that function's context.