Scope Chain

When a function is being executed, in the execution context, there is a link of the parent environment. This link is called scope chain. So when a object/variable is not found in the functional scope, It goes to the parent environment using this scope chain.

N.B.

• The global execution has the Global Lexical Environment

[[scope]]

This keyword return the parents scope of the method.

function myMethod() {}

In browser when we check window.myMethod properties, it will show its environment Global