How to Automatically Show User Email in Forms Using Google Apps Script

Discover how to easily fetch and display user email in your form with Google Apps Script. We'll walk you through a straightforward solution to common coding issues.
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How to Automatically Show User Email in Forms Using Google Apps Script

In the world of web development, automating form fields can greatly enhance user experience. A common requirement is to automatically fill in a user's email address on a form when a specific trigger occurs, such as a button click or when the page loads. However, many developers, particularly those new to Google Apps Script, face challenges achieving this functionality. If you're struggling with displaying a user's email on your form, you're not alone. But don't worry! We'll break down how to resolve this issue step-by-step.

The Problem

You've attempted to create a form that automatically fetches a user's email and displays it when a button is clicked. However, despite your efforts, the email isn't appearing as expected. The main issue originates from a missing function and an incorrect event listener setup in your JavaScript code.

Here's a simplified version of your initial code to help highlight the issue:

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

In this code, while you're correctly aiming to get the user's email, the solution as it stands is incomplete.

The Solution

Let’s dissect the solution into manageable parts, focusing first on correcting the JavaScript and then refining the Google Apps Script.

Step 1: Update Google Apps Script

Your initial email function failed to return the user's email. We will modify it to ensure it sends back the email correctly when called.

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

Step 2: Modify HTML and JavaScript

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

What Changed?

Added Return: The email function in the Google Apps Script now returns the email address.

Correct Function Reference: The event listener for the button now correctly references the correousuario function, which fetches and displays the email.

Success Handler: Utilized withSuccessHandler to ensure the email is only assigned to the input field after it’s successfully retrieved.

Conclusion

By following these steps, you should now have a fully functional form that fetches and displays a user's email address automatically either when the button is clicked or when the page loads. Automating user input like this not only saves time but also enhances user-friendly interactions with your application.

Now that you have the right code, go ahead and integrate these changes into your project. Happy coding!