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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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
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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
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validation
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.
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.