Hi fellows, I have just completed My Calculator and I need constructive reviews <3 I am weak with CSS so improvement tips will be very useful. Also, give my JS code a look to see the way I thought about it 
Waiting for You …
here we are :
Looks good. Cooled be styled better but its not bad.
The javascript could use a bit of optimizing. Wont tell you exactly how but ill point you in the right direction.
<button class=" btn btn-md" id="1" onclick="inputNumber(this)"> 1 </button>
Basically you can call a function with onclick="functionName()".
Ill let you figure out the rest with a bit of google. 
Keep it up! 
EDIT: Just remembered. Your calculator breaks once screen reaches a certain point. Easy fix is to set a minimum width.
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I think that user should’t be allowed to enter multiple dots or operations in a row
https://yadi.sk/i/7q_GQI3i3NvGHa
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You mean to create a function takes the clicked button and creates the same actions as all repeated functions … am I right ?!
I tried to make it responsive but I think I missed up … I 'll try to improve this section
Thank you for your review.It’s very useful <3
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I agree with you about dots and I had fixed this. But Operators I think he can but gives a result that is infinity or some reasonable respond but not an answer as it’s not logical