Field validation in forms
Field validation ensures that the data users submit through forms is accurate, complete, and formatted correctly. This is especially important in enterprise-grade CMS platforms, where forms often collect important customer data.
Two key approaches to field validation are submit-time validation and real-time validation. Submit-time validation refers to checks that occur when a user submits a form or moves to the next page in a multistep form. It ensures that all required fields are completed and that inputs meet specific formats or conditions. Real-time validation, on the other hand, provides immediate feedback as users interact with form fields, such as flagging errors while typing or selecting options. Forms supports both submit-time and real-time validations, covering required fields, patterns, phone numbers, reCAPTCHA, terms acceptance, character limits, option counts, and file upload restrictions. This ensures robust data collection and a better user experience.
Key benefits of field validation
The key benefits of field validation i Forms are:
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Improved data quality - validation rules, such as required fields, email format checks, and phone number patterns, help prevent incomplete or malformed submissions. This ensures that the data entering your system is usable and trustworthy.
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Enhanced user experience - real-time feedback (for example, red or yellow indicators next to fields) guides users to correct mistakes before submission. This reduces frustration and increases form completion rates.
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Security and spam prevention - validation helps block malicious or automated submissions. For example, server-side validation of g-recaptcha is essential to prevent bots from bypassing client-side checks.
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Custom messaging for clarity - you can replace default validation messages with custom ones for required, email, and phone fields. This allows for clearer, brand-aligned communication with users.
Validation on submit and page navigation
The following validations are triggered when the user submits the form or navigates to the next page in a multipage form:
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Required validation - ensures that all mandatory fields are completed.
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Pattern validation - for Email and Short Text fields, custom regex patterns can be used, for example, to validate email format.
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Phone validation - checks that the input matches a valid phone number format.
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reCAPTCHA - ensures the user completes the security challenge.
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Terms & Conditions checkbox - confirms the user has accepted the terms.
Real-time (immediate) validations
These validations occur as the user interacts with the form fields:
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Character limit - for Short Text and Long Text fields, restricts the number of characters while typing.
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Number of options - for Multi Select and Checkbox Group fields, limits the number of options that can be selected.
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File field validations:
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Max single file size - restricts the size of each uploaded file.
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Max number of files - limits the total number of files that can be uploaded.
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Accept file types - restricts uploads to specific file formats (for example, only .txt and .svg files).
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