My first Calculator

Hello, I just finished my first calculator and just seeking some feedback.
Thank you.

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It looks good. I would just advise checking input to make sure that the user can’t enter more than one operator in a row. (In all fairness, I made the same mistake.)

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It works in Chrome, and on my laptop’s touch screen.
If I may point out one thing: the layout is wrong.
Your layout is:

987
654
321

instead of:

789
456
123

which is the standard on all numeric keypads. Doesn’t matter if you’re typing numbers but if you use touch it’ll throw you off.
Phones are:

123
456
789

which I never understood why.
Nice work otherwise!

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Also should not allow multiple decimals (i.e. 28722625*.2580…255)

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Thank for all the input. Really appreciate it, will work on fixing those thing. Thank you😊