The `screenTop` property returns the distance between the top edge of the browser and the top side of the screen.
The return value of this property is pixel based. So if the value is 100, that means the distance is 100 pixels.
Note: if we maximize a browser window, the returned value of this property will be 0.
Also, this property is read-only.
Window screenTop Syntax:
Depending on the current position of the browser window, the value of this property varies.