Required, Pattern, and Other Validation Attributes
HTML validation attributes help ensure users enter correct data:
required: makes a field mandatory;pattern: defines a regex pattern for input (such as phone numbers);min,max: set numeric or date limits;minlength,maxlength: control text length.
These attributes provide instant feedback and reduce errors.
index.html
style.css
Browsers automatically check validation rules and display error messages if input is invalid. This improves user experience and reduces server-side errors.
Write clear patterns and validation rules. For example, use pattern="[0-9]{10}" for a 10-digit phone number. Always provide helpful error messages.
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Can you give more examples of validation patterns?
How do I customize the browser's error messages?
What are best practices for writing validation rules?
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HTML validation attributes help ensure users enter correct data:
required: makes a field mandatory;pattern: defines a regex pattern for input (such as phone numbers);min,max: set numeric or date limits;minlength,maxlength: control text length.
These attributes provide instant feedback and reduce errors.
index.html
style.css
Browsers automatically check validation rules and display error messages if input is invalid. This improves user experience and reduces server-side errors.
Write clear patterns and validation rules. For example, use pattern="[0-9]{10}" for a 10-digit phone number. Always provide helpful error messages.
¡Gracias por tus comentarios!
