Describe the Issue

Example JavaScript Calculator accepts invalid input.

Affected Page

https://javascript-calculator.freecodecamp.rocks/

Your code

*2= 

/2= 

/2/2= 

Expected behavior

It should ignore invalid input.

Screenshots

System

Device: Laptop OS: Windows 18.04.5 Browser: Chrome

Additional context

https://www.freecodecamp.org/learn/front-end-development-libraries/front-end-development-libraries-projects/build-a-javascript-calculator