The ariaMultiline property of the Element interface reflects the value of the aria-multiline attribute, which indicates whether a text box accepts multiple lines of input or only a single line.

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.


var ariaMultiline = element.ariaMultiline;
element.ariaMultiline = ariaMultiline


A DOMString with one of the following values:

This is a multi-line text box.
This is a single-line text box.


In this example the aria-multiline attribute on the element with an ID of txtBoxInput is set to "true" indicating that this box allows for multiple lines of input. Using ariaPlaceholder 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.ariaMultiline); // "true"
el.ariaMultiline = "false"
console.log(el.ariaMultiline); // "false"


Specification Status Comment
Accessible Rich Internet Applications (WAI-ARIA) 1.2
The definition of 'ariaMultiline' in that specification.
Working Draft Initial definition.

Browser compatibility

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See also