How do I make a field required in HTML?
Find out how to make a field required in HTML forms using the "required" attribute and ensure proper validation for user inputs.
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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
Validation | required="true" / "false" | HTML form
Explains how to use the "required" attribute in HTML forms for input validation, including examples and best practices.
Using the HTML5 "required" attribute for a group of checkboxes?
When using the newer browsers that support HTML5 (FireFox 4 for example); and a form field has the attribute required=''required''; and the form field is empty/blank; and the submit button is
Can I apply the required attribute to <select> 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
Use CSS to automatically add ''required field'' asterisk to form inputs
What you need is :required selector - it will select all fields with ''required'' attribute (so no need to add any additional classes). Then - style inputs according to your needs.