PreferenceObject: override property
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 override read-only property of the PreferenceObject interface returns the override of a preference if one is set, null otherwise.
Value
The override of the PreferenceObject interface, if set, or null if an override is not set.
Examples
Basic usage
This example demonstrates how to disambiguate between the color scheme preference set by the user agent vs a programmatic override.
js
if (navigator.preferences.colorScheme.override === null) {
console.log(
"The user agent set the following color scheme:",
navigator.preferences.colorScheme.value,
);
} else {
console.log(
"The following color scheme was set programmatically:",
navigator.preferences.colorScheme.override,
);
}
Specifications
| Specification |
|---|
| Media Queries Level 5 # override-attribute |
Browser compatibility
| desktop | mobile | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
override
|
|
|
|
|
|
|
|
|
|
|
|
|
Legend
Tip: you can click/tap on a cell for more information.
- In development. Supported in a pre-release version.
- In development. Supported in a pre-release version.
- No support
- No support
- Experimental. Expect behavior to change in the future.