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# Mac OS for the Web!

Muhammad Mahdi on November 14, 2021

Mac OS emulator on the Web Hi, I want to introduce my project, which I call Mac OS emulator on the Web. We have programs like Notes, Calculator, T...
blackr1234

One quick question. As there are only two apps available at the moment, I tested the Calculator app with `0.1+0.2` and I got `0.300...004`, a common result we get in some programming languages. Just want to know how (and the best way) can we solve this issue when implementing a calculator app ourselves.

Hi,
This is a good point that I did not pay attention to it before.
When I saw your opinion, I first went to find out how this happens, which was interesting to me.

Then I thought to your question, how can we solve this issue?
At first, I thought we could round the number, but when I used the round method in JS, the result was zero! Then I searched it and realized that we can use the toFixed() method in JavaScript, when we put the digit on 1, the result is 0.3!

I want to know what is your answer to this question and is my answer correct?

Thank you very much for your excellent comment :)

blackr1234 • Edited on

Yes, `toFixed()` is the JS way to round a `Number` and obtain a string. It will work if we know the number of fraction digits. If we divide numbers like `1/3`, `toFixed(1)` will result in an answer `0.3` with a huge deviation compared to something like `0.333333`.
Actually I am also looking for a good answer to this question. But I do have a workaround: to use `toLocaleString` with an `en_US` locale and `maximumFractionDigits` specified as `16` or less.

That's right,
it's a great idea to use `toLocaleString`with an `en_US` locale and `maximumFractionDigits` specified as `16` or less. 👍

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blackr1234

Btw, awesome work. It really feels like macOS and is also running fast!
I've seen a Windows 10 web app here in dev.to before but it was a bit laggy.
When you are 24, you will probably be working at Apple.

Btw, I just checked your GitHub repo, and immediately I have two things in my mind.

1. Why are there private and public keys in the repo source?
2. I thought you did this by using React or some other modern development framework/library but you did this all by vanilla HTML, JS and some jQuery for dragging support. You must have a deep understanding on how website works.
Comment hidden by post author - thread only accessible via permalink
Muhammad Mahdi • Edited on

Thanks :)

1. For your first question, I had the mistake of adding my github's account private key to the repository source.
now I remove them all.

I had no idea what vanilla meant 😅(of course, now I know).

Comment hidden by post author - thread only accessible via permalink
Nicolas Danelon

you are 14? really?
btw, be careful on how you remove those private keys. one commit removing the files is not enough

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Schlick Jones

Just change the keys if you've exposed a private key. As a general rule, never commit a private key on a public repository and really it's best to not ever and use something more secure like Hashicorp Vault or AWS's tools for secrets.

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blackr1234

To OP: See this for GitHub's official guide about removing sensitive data: docs.github.com/en/authentication/...

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asoran

"I had the mistake of adding my github's account private key to the repository source. now I remove them all."

I don't know why I can't press "reply" on your answer, but here:
Well you deleted them, but they are still in the git commit history se we can still see them, so either:

• Remove your repo and make a new one with commits from scratch (new initial commit)
• Revert all the commits up to here github.com/mhmdmhd6/Mac-OS-Desktop... (where you added the public/private keys and push -force back the repo)

I don't know git enough on the security parts, but if you don't want people to do bad things with your keys, invalidate them and generate them again (Idk how, sorry). :)

louis

Hi, Try this.

``````parseFloat((0.1 + 0.2).toFixed(10))
``````
blackr1234

This works too!

23n6

You should use bigNumber to fix it. (Mathjs, Bignumberjs). This is my example: github.com/nguyenvannghi/calc-reac...

Harry Tom

Changing the top-menu font will make it more realistic!

Ansub Khan

this is amazing, however i will recommend you to show the menu list when it is clicked instead of on focus.

Thank you
but I don't understand what do you mean
can you please explain more?

Ansub Khan

i am saying that when i hover on "file" top the top left, it shows the dropdown menu, it should be visible on click action not hover action

Ok I got it
Thank you for the explanation💚

Ansub Khan

anytime brother, you are doing a amazing work! i have followed you and will be looking for the future blogs!

Thank you so much bro :))

very good work....I was experienced for using the MacOS...Thank you

SachinDas246

Coool ❤️

Thank you

laputafish

Good job. Impressive and appreciated.
It is not a difficult project but not easy for your such age. I was only learning AppleSoft Basic (maybe you don't know it) at your age. jQuery is good for beginner. It was also my first library to start web programming. Next step, you can try one of popular frameworks, Angular, React, Vue.js, etc. They are so interesting and funny to play. You will love it.

Mint Coder

Nice one

George Delaportas (ViR4X)

Hi!

Very good work for fun...

If you really want to realize your project maybe you should base it on GreyOS. It is an open source Meta-OS (nothing related to metaverse, facebook, etc.). I have been developing this since 2013.

I am a professional enterprise architect and I'd love to help you Muhammad.

Please check the github.com/g0d/GreyOS for details and let's make something beautiful :-)

Fillipe Romero

Congrats.
What I suggest to you is to check this repo: github.com/PuruVJ/macos-web
This guy already did the exact same thing but in Svelte with some improvements. So i think you can learn from it and also if you want, learn svelt!
The website that is hosted is: macos-preact.vercel.app/

Thank you.
yes, i knew about that :)

This is amazing not only you're just 14 but also you're using only Js not modern framework for building this website.

Btw, there's a little bug in here, but keep going, you're really awesome.

Thanks so much.
Yeah, I'll fix that bug in the next update.

This was awesome, keep going.

Thank you so much
have a nice day :)

Joe Steinbring

That's pretty cool. There is definitely stuff left to do but I really like it. :)

Muhammad Mahdi • Edited on

Thanks :)
I will try to make it better.

Kamaro Lambert

I am here to say that this is impressing! I wonder what you will be able to do after 10 years in computer science. Keep up the good work.

Zachary Truong

This is AMAZING...

Thank you

demiahmed

This is really impressive!

Thanks :)

SaKKo

Awesome!!!!

Thank you

Agnibha Sarkar

wow! how long did it take to make this! and also did you use some framework?

It took time because I was learning during the coding and no I didn't use frameworks just a bit of jQuery.

Chris Hansen

It's sooo good! LOL, great job 💯

Thanks.

MrakCw

Amazing 🚀
💪

Amrut

haha, loved it . This was the first time I had any mac experience. thankyou 😀

Tobychidi

I'm inspired by your great work. And again, congratulations for trying projects like this before learning a framework. In the end, these frameworks have to be written by someone.

Thank you so much.
yeah, I tried to start from scratch to learn better.

Rhytham

Hey, Very Good Work!

Matti

Cool stuff man, keep up the good work

Anas Elgarhy

عااااااش جدا🖤
انا في سنة تانية في حاسبات ومعلومات ولسة م وصلتش لمستواك😂😂❤

Sulman Baig

Great Effort for 14 years old. I am 32 years old. I don't think I can make make this. Kudos to you great effort :-)

obiabo Immanuel

wow this is really awesome

Ankit Beniwal

Although Keyboard shortcuts aren't working but 3-finger drag worked like a charm. It's awesome.

Anas Elgarhy

عاش

Pulkit Sharma

Well, Thats really good and i appreciate this

Please make it more powerful enough and add more features in the coming times, also make it more personal and easier so that we can log on from anywhere and have everything saved

Tobychidi

Wahala oooo

Thank you very much for your ideas
I try my best to add these features to my project :)

Rachit Khurana

This is incredible.

thank you so much :)

Rehman

Wow such a nice website you have created

Thank you my friend :)

Schlick Jones

Good job Muhammad! It's so great that you are getting into this at such a young age! You are on your way to a bright future and an inspiration to kids of all ages.

Thanks.

Ofrepose

This is very impressive! Keep going, you have a bright future ahead of you!

Thanks :)

dansonserge

Keep up the spirit bro

RyanRoybal

This is best helpful information keep it up bit.ly/3nosoxR

wow! such fast learning!

Prathamesh tanksale

Dammm you are aewsome

Thank you

NF

Very good!

Thanks!

DarkBat Gaming™

Amazing man, good job 👍

Thanks :)

Tanishq Singh Anand

Coool
really liked it 🔥🔥🔥

Thanks :)

Mokhtar ExM

Maan, this is awesome 🔥🤙

Thanks.

Taosif Jamal

Awesome! you can call it moc emulator, since its a mock of mac 😜

Thank you!!

Astrov003

There are two 14yo boys here on DEV. One is making MacOS on the web, the other one Windows on the web.
dev.to/abdulrrehman0/windows-12-bu...

What is going on?