ScreenDetailed: top property
Limited availability
This feature is not Baseline because it does not work in some of the most widely-used browsers.
Experimental: This is an experimental technology
Check the Browser compatibility table carefully before using this in production.
Secure context: This feature is available only in secure contexts (HTTPS), in some or all supporting browsers.
The top read-only property of the
ScreenDetailed interface is a number representing the y-coordinate (top edge) of the total screen area inside the OS virtual screen arrangement, relative to the multi-screen origin.
This is equal to the true top edge, ignoring any OS UI element drawn at the top of the screen. Windows cannot be placed in those areas; to get the top coordinate of the screen area that windows can be placed in, use ScreenDetailed.availTop.
Note:
In Firefox, a non-standard implementation of the top property is available on the Screen interface. See the Non-standard example below for usage details, and see the Screen reference page for browser support information relating to the non-standard implementation.
Value
A number.
Examples
Window Management API example
// Available in browsers that support the Window Management API
const screenDetails = await window.getScreenDetails();
// Return the absolute top value of the first screen
const screen1Top = screenDetails.screens[0].top;
Non-standard example
// Available in Firefox
// Return the absolute top value of the current screen
const screenTop = window.screen.top;
Specifications
| Specification |
|---|
| Window Management # ref-for-dom-screendetailed-top |
Browser compatibility
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