Announcement: All noncommercial projects registered to use Earth Engine before
April 15, 2025 must
verify noncommercial eligibility to maintain access. If you have not verified by September 26, 2025, your access may be on hold.
ui.root.setKeyHandler
Stay organized with collections
Save and categorize content based on your preferences.
Sets a keydown event handler to the root panel with a non-predefined key. The handler is fired only once when a user presses the bound key command. The same key will be bound to the latest handler set to it.
| Usage | Returns | ui.root.setKeyHandler(keyCode, handler, description) | |
| Argument | Type | Details | keyCode | List<ui.Key>|ui.Key | A key code or an array of key codes. For example, ui.Key.A or [ui.Key.SHIFT, ui.Key.A]. |
handler | Function | The handler for the key command. |
description | String, optional | A short description that explains this key command. The description will be visible in the Shortcuts Menu. |
Except as otherwise noted, the content of this page is licensed under the Creative Commons Attribution 4.0 License, and code samples are licensed under the Apache 2.0 License. For details, see the Google Developers Site Policies. Java is a registered trademark of Oracle and/or its affiliates.
Last updated 2025-07-08 UTC.
[null,null,["Last updated 2025-07-08 UTC."],[],["The `setKeyHandler` function binds a key command to a handler function on the root panel. It accepts a key code (or array of codes), a handler function, and an optional description. When the bound key is pressed, the handler is executed once. Only the most recently assigned handler for a specific key will be triggered. Key codes can be individual (e.g., `ui.Key.A`) or combined (e.g., `[ui.Key.SHIFT, ui.Key.A]`). The description is used in the Shortcuts Menu.\n"]]