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Discussion on "Hoisting in JavaScript - What exactly does this mean?" | Hashnode

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Austin Asoluka

FullStack Developer.

May 4, 2023

Hoisting in JavaScript - What exactly does this mean?

Assume you are talking with a friend and they ask you about something that you know nothing about. Your response would be "I do not know about that". In the same way, during execution, our program needs to know about the variables we refer to or else...

sleekcodes.hashnode.dev7 min read

#javascript #hoisting #javascript-hoisting #fundamentals #javascript-fundamentals

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Tadeyon Oke

Sep 24, 2024

Pretty insightful for anyone learning for the first time. Thanks for sharing

Good evening sir I am grateful for the article but do mind if I may ask according to statement that variables created with the var key word are not listed among the ECMAScript specifications as hoist-able declaration (please don’t mind if I paraphrase), what then are the listed key words in ECMAScript that are hoist-able

Omayuku Oritsetsolayemi

A software-developer

May 6, 2023

Austin Asoluka

FullStack Developer.

May 6, 2023

Good question, Oritsetsolayemi.

Kindly refer to the link to the ECMAScript specification provided in the article for this information.

idjenughwa ruona

Web developer

May 5, 2023

Now the concept of hoisting has become a lot clearer. Thank you for this piece.

Faruq Olanrewaju

Thrilling and mind-blowing...

May 4, 2023

It's really an insightful piece sir. Thanks sir.

Donice Ubaru

Software Developer

May 4, 2023

Thank you Austin

Austin Asoluka

FullStack Developer.

May 4, 2023

😊 You're welcome.

Saurabh Singh

Programmer & Learner | Open Source Enthusiast

May 4, 2023

Wow ! Just learned a new concept. Thank you for writing.

Austin Asoluka

FullStack Developer.

May 4, 2023

Thank you for reading, Saurabh.

Oghenefejiro Gbaje

May 4, 2023

Thanks for taking the time to explain these concepts, but there is something I didn't get correctly.

You disagreed with the idea that variables created with the let and const keywords are not hoisted, and the reason you gave was that the memory (Script VO) is aware of variables created with the let and const keywords.

If I may ask, does it mean hoisting also occurs even when you do not get to access variables created with the let keyword?

Austin Asoluka

FullStack Developer.

May 4, 2023

You get to access them but after the line where it is defined.
There are three behaviours that characterises hoisting. Variables create with let and const keywords exhibit the third behaviour and these things happen during the creation phase.
The idea of hoisting being associated with the var keyword has been popularised but it is not entirely the truth.

I believe the way I have captured hoisting as a concept is a more accurate way to describe it.