Hey there!

These tips I have listed have worked for me and helped me resolve issues in my code. I also learn a lot while on it.

• Understand the issue.

• Write down the issue.

• Go through the code given twice or more times.

• Understand the code and its logic.

• Analyze the issue based on the current code.

• Device two or more ways to fix it on paper.

• Write pseudocode.

• Implement pseudocode in your file.

• Use Debugging tools

• Use Browser tools for developers like inspect, developer tools, console, etc.

• Include error handling at every point

• If still difficult, discuss this problem with another developer
  regardless of the language used.

• Sleep on the issue.

• Think about the issue deeply.

• Go back and fix the issue.

Sidenotes:

Research as much as you can. Someone might have fixed this issue previously. So search the internet to help you work seamlessly.