Fired when the devtools theme changes.
Syntax
browser.devtools.panels.onThemeChanged.addListener(listener) browser.devtools.panels.onThemeChanged.removeListener(listener) browser.devtools.panels.onThemeChanged.hasListener(listener)
Events have three functions:
- addListener(callback)
- Adds a listener to this event.
- removeListener(listener)
- Stop listening to this event. The listenerargument is the listener to remove.
- hasListener(listener)
- Check whether listeneris registered for this event. Returnstrueif it is listening,falseotherwise.
addListener syntax
Parameters
- callback
- 
 Function that will be called when this event occurs. The function will be passed the following arguments: - themeName
- string. Name of the new theme: this will be one of the permitted values for- devtools.panels.themeName.
 
Browser compatibility
The compatibility table in this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request.
| Chrome | Edge | Firefox | Firefox for Android | Opera | |
|---|---|---|---|---|---|
| Basic support | No | No | 55 | No | No | 
Examples
browser.devtools.panels.onThemeChanged.addListener((newThemeName) => {
  console.log(`New theme: ${newThemeName}`);
});
Acknowledgements
              This API is based on Chromium's chrome.devtools API.
Microsoft Edge compatibility data is supplied by Microsoft Corporation and is included here under the Creative Commons Attribution 3.0 United States License.