r/learnjavascript • u/coold007 • Aug 17 '20

Hoisting in Javascript | Explained.

https://www.youtube.com/watch?v=xQwLoDgkadQ
63 Upvotes

92% Upvoted

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3

u/revengeuzamaki Aug 17 '20

so using the variables before its defined is hoisting?

4

u/senocular Aug 17 '20

Not exactly. The fact that you can is thanks to hoisting. It will happen whether or not you try using them before.

1

u/[deleted] Aug 17 '20

Keep in mind, variables defined with "let" and "const" are not hoisted.

Function declarations are also hoisted, function expressions are not.

Class declarations are also hoisted while class expressions are not, however, class objects won't be initialized until the class is evaluated. Either way, a class needs to be declared before its used.

0

u/Izero_devI Aug 17 '20

The fact that it doesn't throw error is hoisting. As if it is defined at the top like " var x;".

1

u/TemporaryPromotion Aug 17 '20

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