Debugging Asynchronous Code
Debugging asynchronous JavaScript code can be challenging, since operations may not complete in the order you expect and errors can be swallowed or appear disconnected from their source. To make sense of asynchronous flows, you can use browser developer tools to inspect call stacks, set breakpoints, and watch how execution proceeds step by step. Console logging is a helpful way to trace the flow of asynchronous operations, but it is most effective when combined with other tools that let you pause and inspect code as it runs.
- Breakpoints allow you to pause execution at specific lines and inspect variable values, even inside asynchronous callbacks;
- Modern browsers also provide async stack traces, which help you see the sequence of asynchronous calls leading to an error;
- Clear and consistent logging, such as including unique identifiers or timestamps, makes it easier to follow the path of asynchronous events through your code.
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Can you explain how to set breakpoints for asynchronous code in browser developer tools?
What are some best practices for using console logging with async JavaScript?
Can you give an example of debugging a promise or async/await function?
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Debugging asynchronous JavaScript code can be challenging, since operations may not complete in the order you expect and errors can be swallowed or appear disconnected from their source. To make sense of asynchronous flows, you can use browser developer tools to inspect call stacks, set breakpoints, and watch how execution proceeds step by step. Console logging is a helpful way to trace the flow of asynchronous operations, but it is most effective when combined with other tools that let you pause and inspect code as it runs.
- Breakpoints allow you to pause execution at specific lines and inspect variable values, even inside asynchronous callbacks;
- Modern browsers also provide async stack traces, which help you see the sequence of asynchronous calls leading to an error;
- Clear and consistent logging, such as including unique identifiers or timestamps, makes it easier to follow the path of asynchronous events through your code.
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