The ariaRequired property of the Element interface reflects the value of the aria-required attribute, which indicates that user input is required on the element before a form may be submitted.
  Note: Where possible use an HTML <input> element with type="text" or a <textarea> as these have built in semantics and do not require ARIA attributes.
  
 
A string with one of the following values:
  "true"  -  
Users need to provide input on an element before a form is submitted.
   "false"  -  
User input is not necessary to submit the form.
   
 
In this example the aria-required attribute on the element with an ID of txtBoxInput is set to "true" indicating that this input must be completed. Using ariaRequired we update the value to "false".
 
<div id="txtboxMultilineLabel">Enter the tags for the article</div>
<div
  role="textbox"
  id="txtBoxInput"
  contenteditable="true"
  aria-multiline="true"
  aria-labelledby="txtboxMultilineLabel"
  aria-required="true"></div>
  
let el = document.getElementById("txtBoxInput");
console.log(el.ariaRequired); 
el.ariaRequired = "false";
console.log(el.ariaRequired);