The HTMLElement.title property represents the title of the element: the text usually displayed in a 'tooltip' popup when the mouse is over the node. 
 The HTMLElement.title property represents the title of the element: the text usually displayed in a 'tooltip' popup when the mouse is over the node. 
A string.
js
const link = document.createElement("a"); link.innerText = "grapes"; link.href = "https://en.wikipedia.org/wiki/Grape"; link.title = "Wikipedia page on grapes";
| Specification | 
|---|
| HTML Standard  # dom-title  | 
| Desktop | Mobile | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Chrome | Edge | Firefox | Internet Explorer | Opera | Safari | WebView Android | Chrome Android | Firefox for Android | Opera Android | Safari on IOS | Samsung Internet | |
title | 
1 | 12 | 1 | 5.5 | ≤12.1 | 3 | 4.4 | 18 | 4 | ≤12.1 | 1 | 1.0 | 
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    https://developer.mozilla.org/en-US/docs/Web/API/HTMLElement/title