How to Fix the await Issue in JavaScript: Resolving Promises Correctly

Discover how to handle `await` calls correctly in JavaScript by ensuring promises are resolved. Learn why your code may not execute the next line as expected and how to fix it!
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Understanding the Problem

If you are working with asynchronous JavaScript using async and await, you might run into some unexpected behaviors. One common issue arises when you create a promise but forget to resolve it. This can lead to scenarios where your code does not execute subsequent lines after an await statement, causing confusion.

Consider the following code snippet:

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Expected vs Actual Output

You might expect the output to be:

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However, you only receive:

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The Solution: Resolving the Promise

The issue here is quite simple: You forgot to resolve your Promise. When you create a new promise, it is essential to call the resolve function to signify that the promise has been fulfilled. By not doing this, the await statement remains pending, and thus the next line of code never runs.

Revised Code

To resolve this issue, you need to include a resolve call within your promise. Here’s how the corrected code looks:

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What You Did

Console Log: Initially logs "foo".

Promise Resolution: Calls resolve(), which indicates that the promise has been completed.

Await: The await statement now waits for the promise to be resolved before moving on.

Final Log: Finally, logs "bar".

Conclusion

Always remember to resolve your promises when using async/await. This practice ensures that your code executes as expected and avoids confusion regarding what is happening behind the scenes. By correcting the code, you can achieve the output you intended:

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If you ever find yourself in a similar situation, check your promises to ensure they're resolved properly. Happy coding!