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Email and Mobile number input fields

Email and mobile numbers are among the most widely used and accepted communication channels for engaging with customers. At cidaas, we understand the importance of accuracy in these inputs to ensure seamless communication. To help you enhance user experience, we provide the best and most tested practices for handling email and mobile input fields.

When designing user interfaces for email and mobile number input fields, following these best practices can improve usability, accessibility, and security, ensuring a smoother experience for your customers.

General Best Practices​

✅ Keep it Simple: Use clear labels and intuitive design to avoid confusion.

✅ Provide Real-time Validation: Offer immediate feedback if input is incorrect.

✅ Ensure Accessibility: Support screen readers and allow easy navigation.

✅ Use a Single Column Layout: Reduces cognitive load and improves focus.

✅ Clearly Indicate Required Fields: Use asterisks (*) or labels like "(Required)".

Email Input Best Practices​

📬 Use the Correct Input Type​

  • Use < input type="email" > to enable built-in validation on modern browsers.

📬 Allow Copy-Paste​

  • Don't block copy-paste as users often retrieve emails from other sources.

📬 Avoid Confusing Constraints​

  • Allow uppercase and lowercase letters; email addresses are case-insensitive, but convert them to lowercase before calling apis

📬 Show Error Messages Clearly​

📬 Confirm Email (if needed)​

  • If requiring email confirmation, offer a "Show Email" option to avoid retyping errors.

Mobile Number Input Best Practices​

📳 Use the Correct Input Type​

  • Use < input type="tel"> to show a numeric keyboard on mobile devices.

📳 Provide Country Code Selection​

  • Use a dropdown or auto-detect based on IP for country selection (Example, +49 for Germany).

📳 Format the Number Dynamically​

  • Add spacing or dashes automatically (Example., +49 170 1234567).

  • Accept different formats and convert them internally (Example, 01701234567 → +49 170 1234567).

📳 Allow Copy-Paste & Autofill​

  • Users often copy numbers from contacts or messages.

📳 Indicate Correct Format​

  • Example: "Enter your number in international format: +49 170 1234567".

📳 Validate Before Submission​

  • Use regex or libraries like libphonenumber to check validity.

  • Example regex: ^+?[1-9]\d14$ (E.164 format).

📳 Use a Separate Field for Country Code (if needed)​

  • Some UIs provide a dropdown for country code (+49) and a separate input for the number.

📳 Avoid Confusing Restrictions​

  • Don't enforce a fixed number length unless necessary for a specific country.

Enhancing UX​

🚀 Provide Input Masks: Guide users visually with a placeholder like +49 ____________.

🚀 Enable One-time Passwords (OTP): If collecting phone numbers for verification, send OTP codes.

🚀 Use Icons & Hints: Display an envelope 📩 for Email and a phone 📞 for mobile numbers.

🚀 Allow Easy Edits: Show a clear "Edit" button instead of forcing re-entry.

Any queries please contact us directly on our support page