it is working fine only my device
os : windows 10
browser : chrome version 108.0.5359.126

For me it also seems to be a bit buggy. Please refer to the attached video.

Where can i find code of this calculator?

i can fix it please assign me

i can fix both of problem invalid input and incorrect formula

The code for this lives in our demo-projects repo.

I'd like to add the ability to use keyboard commands as well as mouse-clicked buttons on the calculator.

For me it looks like the original buggy input has been fixed as it gives the result in the screenshot.
Platform: Ubuntu Linux 22.04
Browser: Firefox 108.0.2

Has anyone started on this? I would like to collaborate if anyone has.

I Would love to contribute on it also, And its my first contribution also. Do let me know how to contribute

I'm in this one too. Where do we start ?

@CallmeHongmaybe lets connect over email to collaborate further on this problem.

Okay email sent. And for the record, I can reproduce the exact same error as the OP's.

Hey maintainers,
how can I and @CallmeHongmaybe collaborate on this issue together? Is it possible for two people to collaborate on the same issue?

The code for this project lives here. If anyone wants to try and fix this issue, we would accept the changes.

You can collaborate however you want @spiritanand - get in touch with each other and pair up on it.

Yeah, @moT01! We will solve the problem together, but how will we get both of us assigned as the contributor of the PR we create?

Works fine on my PC

Platform: Windows 10 Pro
Browser: Chrome Versão 114.0.5735.110
I was testing a few different inputs and found this behavior:
For example, when typed just "=" it gives the result NaN. If you use an operator, it includes NaN in the sum.
As in "= + 15 =" results in "NaN ".
When result is Ifinity as in "10/0" and operator is used, also use Ifinity in the sum.
Only when typing a number does it discard the previous result. I believe it is not necessary to use NaN or Ifinity in sums.

I had observed an UI issue, while multiplying two numbers , 'x' symbol should be used for multiplication for better user experience,

But instead, Dot ' . ' symbol is used .