What is the use of HTML <fieldset> Tag

The HTML <fieldset> tag represents a group of form elements in an HTML document.

Syntax

The <fieldset> tag is written as <fieldset></fieldset> with the grouped form controls inserted between the start and end tags.

You can use the disabled attribute to disable all child form controls within the <fieldset> element. You can also use the form attribute to associate the element with a <form> element on the same document.

Example:-

<fieldset form="myForm" disabled>

...write whatever you want your form to be like...

</fieldset>