How to set HTML5 required attribute in Javascript? edName attributes required = [object Attr] That's because required in that code is an attribute object, not a string; attributes is a NamedNodeMap whose values are Attr objects To get the value of one of them, you'd look at its value property But for a boolean attribute, the value isn't relevant; the attribute is either present in the map (true) or not present (false) So if required weren't
Can I apply the required attribute to lt;select gt; fields in HTML? The required attribute is a boolean attribute When specified, the user will be required to select a value before submitting the form If a select element has a required attribute specified, does not have a multiple attribute specified, and has a display size of 1 (do not have SIZE=2 or more - omit it if not needed);
How to use the required attribute with a radio input field 1022 TL;DR: Set the required attribute for at least one input of the radio group Setting required for all inputs is more clear, but not necessary (unless dynamically generating radio-buttons) To group radio buttons they must all have the same name value This allows only one to be selected at a time and applies required to the whole group
Argparse: Required arguments listed under optional arguments? Note: Required options are generally considered bad form because users expect options to be optional, and thus they should be avoided when possible That being said, the headers “positional arguments” and “optional arguments” in the help are generated by two argument groups in which the arguments are automatically separated into
Conditionally required property using data annotations If they check company a bunch of other fields become required Such data model properties (related to those fields) would have this attribute on them [RequiredIf('IsCompany', true)] where IsCompany: bool is usually bound to a checkbox