How Can I Customize HTML Form Validation Messages for Blank Fields and Passwords?

Customizing HTML Form Validation Messages

When submitting forms with empty or invalid fields, browsers typically display generic error messages. To enhance user experience, customizing these messages is essential. This question explores how to modify the default validation messages in HTML forms, particularly for blank fields and the password input field.

Solution:

To display a custom error message for a blank input field, use the following code:

<input type="text" required placeholder="Enter Name"
       oninvalid="this.setCustomValidity('Enter User Name Here')"
       oninput="this.setCustomValidity('')"/>

The key component is the setCustomValidity() method, which sets a custom validation message for the element. When the input is invalid (e.g., empty), it displays the custom message. The oninput event handler removes the custom message when the user enters new data, enhancing user interaction.

For password fields, whose default error message is a sequence of asterisks, you can leverage the same setCustomValidity() method. By setting a custom error message, the browser will display your message instead of asterisks.

Additional Notes:

• The this keyword is not strictly required for inline event handlers, but using it promotes consistency and clarity.
• Custom validation messages enhance user experience by providing clear and specific error messages.
• This approach is applicable to all form elements, allowing for complete customization of validation feedback.

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