I complete this code challenge using with jQuery and Bootstrap 4:
Codepen
Please test on my webpage.
It is works also with keyboard event… 
2 Likes
Pretty cool, good job! I found only one minor bug: how do I 42/-2?
1 Like
Nice I’m wondering how hard it would be to add functions like figuring %.
Great work I have not gotten this far yet.
Hi,
Thanks for your response. I checked this ‘minor bug’.
I have windows 10 op. system on my machine. When I developed the calculator I tried to get same functionality like the win 10 calculator. 42/-2 = 40 because the calculator change the operator to the last pressed if been entered more than one. So 42/-2 => 42-2 = 40.
On the calculation field also changed the operator to the last one.
When you enter 42/-2 and press enter or equal
The result is:
- on calculation field:
42-2=40 - on display: 40
I don’t handle this result as any bug. This is more like a behavior of some calculators…
But anyway really thanks for your opinion.
My brain nerded out - do you mean a modulo calculation, or a percentage one?
Yes, apple calculator does the same, however it has +/- button for handling negative numbers. I’m pretty sure win 10 calculator has one too
Anyway it’s fair point!
Yes, there is…
42 - = 0 on win10… strange too.
It’s change the calculation to 42 - 42 = 0
That’s how all hardware calculators work actually, keep pressing = and you will get the idea