The HTML required attribute can be used to specify whether the element must be filled out or not before submitting the form. It is a boolean attribute that requires boolean values like true and false. Example: Form with Required input field

The step Attribute. The input step attribute specifies the legal number intervals for an input field.. Example: if step="3", legal numbers could be -3, 0, 3, 6, etc. Tip: This attribute can be used together with the max and min attributes to cre

Tips and Notes. Tip: The for attribute of <label> must be equal to the id attribute of the related element to bind them together. A label can also be bound to an element by placing the element inside the <label> element.