The performance property returns a Performance object, which can be further used to gather performance information about the current document.
Syntax:
var per = window.performance
Return Value: It returns a performance object.
Example: This example shows how to get the performance object of the document using this property.
HTML
<!DOCTYPE HTML>
< html >
< body style = "text-align:center;" >
< h1 style = "color:green;" >
GeeksforGeeks
</ h1 >
< p >
HTML | window performance property
</ p >
< button onclick = "Geeks()" >
Click Here
</ button >
< script >
function Geeks() {
console.log(window.performance);
}
</ script >
</ body >
</ html >
|
Output:
Before Clicking the Button:

After Clicking the Button: In the console, the performance object can be seen.

Supported Browsers:
- Google Chrome
- Edge
- Firefox
- Safari
- Opera
- Internet Explorer