Project link: jsCalculator
Thank you in advance for your feedback.
Hi @salasy
I like the design, I love how mechanically the buttons feel, feels like I’m pressing real buttons 
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I did notice a strange bug, if you continuously press the off part of the toggle switch, it turns the calculator on/off but doesn’t trigger the switches animation.
Other than that, good job dude!
@salasy looks nice. one thing that is a little annoying to me is there is no backspace button, so if you’re in a complicated problem and mess it up a little you have to start all over .
Nice look! There may be some bugs with the arithmetic. I tried 4+410 and got 160 instead of 44 (or some would say 80 would be acceptable too - but I don’t think so because multiplication/division has higher precedence than addition/subtraction). As a matter of fact I just tried 44*10 and got 160 again! Time for a bug hunt! 
Keep up the good work!
Thank you for your comments.
I’ll try to correct mistakes.
Try these:
0.1+0.2
9999999 (off/on) 99 (off/on) 99 (off/on) 99 (off/on) 99 (off/on)
99999999999999999 - 1 = …
Thank you. I’ll check it and try to correct mistakes.