The scope is the current context of execution in which values and expressions are "visible" or can be referenced. If a variable or expression is not in the current scope, it will not be available for ...

Lexical scope simply means the other scopes have access to the variables defined in outer scopes. The reason why this works is thanks to JavaScript closures. Closures is a topic of its own and you ...

scope chain refers to mechanism that javasScript uses to resolve variable reference SCOPE CHAIN PROCEDURES TO RESOLVE VARIABLE ACCESS IN JAVASCRIPT Start with the Current Scope: The engine first looks ...