Input field validation for forms: A checklist from a designer to a dev with love

FORM VALIDATION IS TAKEN FOR GRANTED AND YET IT COULD MAKE OR BREAK THE QUALITY OF WORK YOU PUSH TO STAGING OR PRODUCTION.
I have created a quick checklist to help your form validation be as sleek as Kim Kardashian's bun.

Start here

1. Identify Required Fields: Clearly mark all mandatory fields (asterisk, bold text)

2. Define Validation Rules: Document specific requirements for each field (length, format, etc.)

*Validation Checks *

1. Length: Minimum and maximum characters allowed (e.g., username 6-20 characters)

2. Data Type: Numbers only, letters only, email format, etc. (use regular expressions if needed)

3. Range: For numbers (e.g., age between 18-65)

4. Selection: Ensure dropdowns or radio buttons have a valid selection

*Error Messages *

1. Clarity: Use clear and concise language (e.g., "Username must be 6-20 characters")

2. Specificity: Indicate the exact error (e.g., "Invalid email format").

3. User-friendliness: Avoid technical jargon (e.g., "Please enter a valid email" instead of "Invalid email syntax").

4. Placement: Display error messages near the associated field.

Additional Tips

1. Real-time feedback: Consider inline validation as users type (e.g., color change for invalid input).

2. Positive reinforcement: Acknowledge successful validation (e.g., green checkmark).

3. Testing: Thoroughly test all validation scenarios.

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