suggest alternative username when chosen one is taken #89
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Previously, the registration form only displayed an error when a username was already in use. This change appends a 'suffix' string to the entered username and displays it as a suggested alternative, improving the user experience.
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Context
The registration logic responsible for validating usernames is implemented on the client side. To make the change, I located the validateUsername function inside public/src/client/register.js. Since the "username taken" message originates from validateUsername, this was the correct place to modify the behavior to also suggest an alternative username.
Description
This pull request updates the registration form logic in public/src/client/register.js to improve the user experience when a chosen username is already in use.
Previously, the UI only displayed an error message ("Username taken"). Now, if the entered username is taken, the form will also display a suggested alternative username by appending a "suffix" string to the original input (e.g., test123 → test123suffix).
Changes include:
Modified validateUsername():
When API checks detect the username is taken, display an error message with a suggested alternative username
Preserves existing success/error logic
Testing:
Enter a username that is known to be taken
Confirm that the error message displays along with a suggested alternative username
Enter a new, unused username to confirm normal registration behavior is unaffected