HTML5 HTML5 Forms and Input Types 2 — Questions and Answers
Question 1: Which HTML5 attribute allows you to validate an input field value against a regular expression?
- pattern (Correct answer)
- validate
- regex
- format
Correct answer: pattern
The pattern attribute specifies a regular expression that the input's value must match for the form to be valid.
Question 2: What does the 'novalidate' attribute on a <form> element do?
- Disables built-in HTML5 form validation (Correct answer)
- Prevents the form from submitting
- Clears all form fields
- Hides validation error messages
Correct answer: Disables built-in HTML5 form validation
The novalidate attribute specifies that the form should not be validated when submitted, bypassing HTML5 constraint validation.
Question 3: Which HTML5 input type is used specifically for entering a URL with format validation?
- url (Correct answer)
- link
- href
- web
Correct answer: url
The input type='url' validates that the entered value is a properly formatted URL including the protocol.
Question 4: What is the <datalist> element used for in HTML5?
- Providing a list of predefined options for an input field (Correct answer)
- Creating a dropdown select menu
- Defining a data table
- Listing form validation errors
Correct answer: Providing a list of predefined options for an input field
The <datalist> element contains a set of <option> elements representing autocomplete suggestions for an associated text input.
Question 5: Which attribute on an <input> element links it to a <datalist> for autocomplete suggestions?
- list (Correct answer)
- datalist
- for
- bind
Correct answer: list
The list attribute on an <input> references the id of a <datalist> element to provide autocomplete suggestions.
Question 6: What does the 'min' attribute specify on an HTML5 number input?
- The minimum acceptable value (Correct answer)
- The minimum number of characters
- The minimum field width
- The minimum label length
Correct answer: The minimum acceptable value
The min attribute sets the minimum value that an input of type number, range, or date will accept during validation.
HTML5 HTML5 Forms and Input Types 2
Which HTML5 attribute allows you to validate an input field value against a regular expression?