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The :required selector selects form elements which are required. Form elements with a required attribute are defined as required. Note: The :required selector only applies to the form elements: input, select and textarea. Tip: Use the :optional selector to select form elements which are optional.

How to indicate a required field Provide the required text in the label. Provide a graphic * image in the label with appropriate alt text. Providing star (asterisk) symbol. Use of color to identify if a form control is required. Providing HTML5 & ARIA required attributes.

The readonly attribute makes a form control non-editable (or ?read only?). A read-only field can't be modified, but, unlike disabled , you can tab into it, highlight it, and copy its contents.

# Set the "required" Attribute using JavaScript Select the element. Use the setAttribute() method to set the required attribute. The setAttribute method will add the required attribute to the element.

HTML | <input> required Attribute The HTML required Attribute is a Boolean attribute which is used to specify that the input element must be filled out before submitting the Form. This attribute works with other types of input like radio, checkbox, number, text, etc.

Use asterisks to indicate required fields? Another common approach seen in forms is to mark the mandatory fields with an asterisk and not mark the optional fields. While an asterisk to the left of the label makes it easy to see, it assumes a user understands what this means.

It should be marked by any form of control to have a value that shouldn't be kept blank before any form is submitted on a webpage. To make a field required, add the attribute at the end of the input field.