HTMLElement.title
 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. 
Syntax
var str = element.title; element.title = str;
Example
const link = document.createElement('a'); link.innerText = 'grapes'; link.href = 'https://en.wikipedia.org/wiki/Grape'; link.title = 'Wikipedia page on grapes';
Specifications
| Specification | 
|---|
| HTML Standard (HTML) # dom-title | 
Browser compatibility
| 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 | 
See also
- The HTML title global attribute.
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    https://developer.mozilla.org/en-US/docs/Web/API/HTMLElement/title