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JavaScript JavaScript Basics (Retired) Creating Reusable Code with Functions Variable Scope

Abir Ahmed
PLUS
Abir Ahmed
Courses Plus Student 8,616 Points
Posted by Abir Ahmed
Abir Ahmed
Courses Plus Student 8,616 Points

Why by removing "var" of the functions make functions look for a variable in Global Scope?

I mean how will function know if " person = 'lilah' " is a variable as there is no indicator that " person = 'lilah' " is a variable?

1 Answer

Daryl Carr
Daryl Carr
18,318 Points
Daryl Carr
Daryl Carr
18,318 Points

I think its just a default. The global scope is basically a property on the global object so as you have assigned it without the var keyword, its default is to add it as a property of the global object... As for knowing, there is an assignment operator, the = so it js thinks you are saving a value to something, aka a variable.