How to change variable value in .js files using popup.html in chrome extension?

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Javascript

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Hi, I have many variables assigned in many .js files in my chrome extension. But sometimes I need to change those variable values. To change, I need to edit the .js script each and every time. Can you please suggest any method where I can change the variable values in .js script files directly from popup.html. It will be helpful and user friendly for me if you help. Thanks in advance.