what_is_global_execution_context_.md

What is global execution context?

What is global execution context?

The global execution context is the default context in which JavaScript code runs. It is created when a JavaScript file is executed and contains:

1. Global Object:

   • In browsers, this is the window object.

2. this Keyword:

   • Refers to the global object in non-strict mode.

3. Global Variables and Functions:

   • All declared variables and functions at the top level.

Example:

console.log(this); // window in browsers
var a = 10; // Part of global execution context

Tags: intermediate, JavaScript, Execution Context