Despite the obvious benefits of validation

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Reducing the number of errors
Validation minimizes the risk of sending incorrect data to the server. This simplifies the work of the server part of the site and increases the reliability of the system. Instead of processing errors on the server, the system notifies the user in advance that the data is incorrect.
Protection from malicious data
Protective validation is an important security tool. It prevents users from sending data that could threaten the site's security. For example, checking for SQL injections and other vulnerabilities protects the site from unauthorized access to data.
Increase conversion
Correctly functioning forms improve conversion, as the user does not have problems with filling them out. If the form is convenient and understandable, the chance of completing the target action increases, which has a positive effect on the site's performance.
form validation
Common Form Validation Mistakes
there are still mistakes buy bulk sms saudi arabia you can make when setting it up that will worsen the user experience.
Insufficient error information
Error messages should be precise. If the error is not described and only a general message "Input error" is displayed, the user may be confused. It is better to provide the reason, for example: "Enter the phone number in the format +7 (999) 123-45-67" or "The email field cannot be empty."
Too strict restrictions
If the form requires too complex conditions, for example, when entering a password, this may scare off the user. It is better to choose the optimal parameters and make them flexible. For example, a minimum password length of 8 characters with one special character will be sufficient for security and will not create difficulties for the user.
Mismatch between client and server validation