revision:
This property sets or returns the value of an element's title attribute. The title attribute specifies extra information about an element. It can be shown as a tooltip text when the mouse moves over the element.
Syntax:
element.title : returns the title property: the value of the element's title attribute.
element.title = text : sets the title property.
property value:
text : the value for the element's title attribute.
example
WHO was founded in 1948.
The title of the abbr element is:
<div>
<p><abbr id="Abbr" title="World Health Organization">WHO</abbr> was founded in 1948.</p>
<p>The title of the abbr element is: <span id="prop"></span> </p>
</div>
<script>
const element = document.getElementById("Abbr");
document.getElementById("prop").innerHTML = element.title;
</script>