Chapter 6 Flashcards
Which attribute enhances usability in modern browsers?
placeholder
Which type value for the input element triggers validation in modern browsers?
number
document.getElementsByTagName(“form”)[0], you could use the code
document.forms[0]
Use of the ____ attribute of the form element is not allowed in the strict DTD for XHTML.
name
Many aspects of the way browsers present browser-based validation feedback are customizable through the properties and methods of the ____.
constraint validation API
In modern browsers, which attribute of an input element prevents the form from being submitted if the field is left blank?
required
Displays a validation error in a modern browser
bubble
Reduce the likelihood of user errors when completing a form
assistive functions
Enables customization of validation feedback in modern browsers
constraint validation API
Persistence required for a user to accomplish a goal
friction
Determines whether a value is not a number
isNaN() function
Checking that information provided by users conforms to rules
validation
Provides guidance about what data should be entered in a text box
placeholder
If all its properties are false, then its value is true
validity object
Stops a form from being submitted when the submit event is triggered
preventDefault()
Indicates that a form element must have a value
required
The ____ event fires when a form is submitted.
submit
For any fields that require numeric values, you can use JavaScript’s built-in ____ function to determine whether a user actually entered a number.
isNaN()
Which form element is useful for limiting user options to a set of choices?
selection list
You can use the CSS ____ pseudo-classes to change the properties of form elements based on their validity status.
invalid and :valid
You create an empty document fragment using the ____ method.
createDocumentFragment()
To check a group of fields and trigger an error message if any of them is empty, you use a(n) ____ statement.
loop
When a control’s value is found to be invalid during constraint validation, the ____ event is triggered.
invalid
Which attribute toggles off validation of a form when added to the opening tag?
novalidate
To display no default value on a selection list, you set its ____ property to -1
selectedIndex
What element property would you use when copying the contents of one text field to another text field?
value
You use the ____ method on an object to block the action normally associated with an event.
preventDefault()
To check if an option button is selected, you access the value of its ____ property.
checked
In general, modern browsers display validation feedback after the ____ event is triggered by a form.
submit
Validation errors found by modern browsers are reported in ____.
bubbles
