Скачать или смотреть Solving the await is only valid in async function Error in Node.js with SendGrid and Nodemailer

Learn how to fix the `await is only valid in async function` error when resetting a password using SendGrid and Nodemailer in Node.js.
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This video is based on the question https://stackoverflow.com/q/63150482/ asked by the user 'Yogesh Mishra' ( https://stackoverflow.com/u/10582947/ ) and on the answer https://stackoverflow.com/a/63150871/ provided by the user 'tbking' ( https://stackoverflow.com/u/2751596/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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Solving the await is only valid in async function Error in Node.js with SendGrid and Nodemailer

When working with asynchronous code in Node.js, you might come across a frustrating message: SyntaxError: await is only valid in async function. This error often occurs when you are trying to use the await keyword outside of an async function. Today, we'll dive deep into understanding this error and how to solve it, especially in the context of resetting a password using SendGrid and Nodemailer.

Understanding the Problem

Consider the following scenario: you're implementing a password reset functionality for your application. You're generating a token, looking up a user in your database, and sending an email with a reset link. Just when you think everything is set, you encounter the dreaded await is only valid in async function error while attempting to send the email using Nodemailer.

The Code Snippet

Here is the original structure of the code where the problem occurs:

[[See Video to Reveal this Text or Code Snippet]]

The Solution

The key to resolving this error lies in ensuring that all functions where await is used are marked as async. In our case, the callback within crypto.randomBytes needs to be asynchronous as well. Here’s how you can update your code:

1. Update the Callback Function

Simply add the async keyword to the callback of crypto.randomBytes:

[[See Video to Reveal this Text or Code Snippet]]

2. Testing Your Changes

Once you've made this change, test your password reset functionality again. The error should be resolved, allowing the await keyword to be used correctly throughout your function.

Conclusion

Encountering asynchronous function errors can be frustrating, especially during important functionalities like password resetting. By ensuring the use of the async keyword correctly, you can avoid common pitfalls in Node.js and streamline your coding process. With this solution, you're now on your way to successfully implementing password reset functionality with SendGrid and Nodemailer.

Feel free to share your thoughts or questions related to this topic in the comments below!