Factory Function vs. Constructor vs. Class - JavaScript Tutorial

What is the difference between a Factory Function and a Constructor in JavaScript?

Factory vs. Constructor from the series "10 Things JS Developers Should Know"

This is episode 5 in a 10 part series I’m calling 10 things javascript developers should know but probably don’t. In this series, we’re going to cover some of the most fundamental and important parts of JavaScript that most of us don’t actually know, and barely touch. Today, for episode 5, we’re talking about the differences between Factory Functions and Constructor Functions, when should we use one or the other? Episode 5: Factory vs. Constructor. Let’s go!

All the code from this series is available here:

0:00:00 Intro
0:01:00 Recap: What is a Factory and what is a Constructor?
0:02:02 Differences: Factory Function
0:14:08 Differences: Constructor Function
0:18:04 Why you should use Factories
0:20:30 Classes
0:22:22 Conclusion

[ColorCode-io]

What is the difference between a Factory Function and a Constructor in JavaScript?

[dreamer]

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[flavour_country]

Hands down the best teacher I’ve come across on YouTube. Keep producing content!!! Love it

[thomaswinterburn]

Thanks for this tutorial series

My key Takeaways from this video

Factory functions, by default, create distinct copies of methods for each object, which can be memory intensive.

Constructors, by using prototypes, share a single method instance among all objects, which is memory efficient.

Constructors enable genuine inheritance, unlike factories that need workarounds for a similar effect.
Why Use Factories:

Simplicity: They're just standard functions without needing the 'new' keyword or dealing with 'this'.

Flexibility: They leverage closures, promoting data privacy by not exposing certain properties or methods directly.

Data Privacy: Properties or methods can be hidden, reducing the chance of unintentional overwrites.

[rjwhite]

Why doesn’t this series have millions of views

[asheradanehi]

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[SiRexable]

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[sara]

So funny, love how he doesn't just explain how to create constructors/functions but also gives practical examples of how and why the distinctions are important. Liked and subscribed.

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[orrodrigez]

i am usually not commenting but once i saw it has only 25k views i had to come down here and say i've been struggling with these stuff for a while and this series shed light over everything
i really hope more programmers get to see these :D

[elielberra]

Thank you so much for this series of videos! You explanations are perfectly clear, the editing is amazing and they are super entertaining :)

[gottadance]

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[iamseanhahaha]

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[FrostDrive]

Wow, I've watched so many videos on this and your explanation is by far the best. deserve way more subs

[zafiroula]

You explained the difference so good! I was struggling to understand the difference since im new to JS. You're the best🙌

[stephenreynolds]

I am currently doing a project for college on constructor functions, and these videos have helped a lot! You are the most clear and concise person to explain all of the parameters of a constructor function. Thank you! :D

[TheAcidMotion]

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[BigSmoke-rw]

I came back to this video just to refresh my mind! Thank you once again!