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JavaScript JavaScript Loops, Arrays and Objects Tracking Data Using Objects Mixing and Matching Arrays and Objects

Posted by anthony amaro
anthony amaro
8,686 Points

why dont we get an error with the html variable

at line 34 dave uses an html variable. but he never created a variable name html. why does that work?

1 Answer

Unsubscribed User
Unsubscribed User
15,444 Points
Unsubscribed User
Unsubscribed User
15,444 Points

It is possible to create a variable without using var, const or let. It comes down to scope.

If a var, const or let keyword is not used before a variable name, then that variable's scope is GLOBAL .

Variables declared outside a function become GLOBAL, and all scripts and functions can access it and unless you declare it as const, can overwrite it .

If you declare a variable without using var, const or let, the variable always becomes GLOBAL regardless of whether or not it has been declared within a function or not.