html - required or required = "required" - Stack Overflow
Sep 24, 2013 · Required This attribute specifies that the user must fill in a value before submitting a form. It cannot be used when the type attribute is hidden, image, or a button type (submit, reset, or …
validation - How to Indicate Required Fields? - Stack Overflow
Source: Form fields — Required vs Optional by Jordane Sanson Why use optional fields is always better than required : An asterisk is obvious to you, not to everyone, believe me, there are always some …
How to use the "required" attribute with a "radio" input field
Feb 24, 2020 · 1024 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). …
How do I make a field required in HTML? - Stack Overflow
Find out how to make a field required in HTML forms using the "required" attribute and ensure proper validation for user inputs.
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 …
html - Required attribute HTML5 - Stack Overflow
Required attribute HTML5 Asked 15 years, 7 months ago Modified 7 years, 6 months ago Viewed 217k times
Validation | required="true" / "false" | HTML form - Stack Overflow
Explains how to use the "required" attribute in HTML forms for input validation, including examples and best practices.
What does it mean for a property to be [Required] and nullable?
Required is a data annotation for the view. The view will require it to have a value prior to accepting a form post. That the value is nullable is related to what is allowed in the database. A value may be null …
Conditional required validation in angular reactive form
Oct 18, 2018 · I want to apply conditional validation on some properties based on some other form values. I have referred some answers Angular2: Conditional required validation, but those are not …
Why were `required` and `optional` removed in Protocol Buffers 3?
I noticed that required and optional have been removed in the new syntax. Why were required / optional removed in proto3? Such keywords introduce constraints which should improve robustness.