PreferenceManager: reducedData 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 reducedData read-only property of the PreferenceManager interface returns a PreferenceObject used to override the user's preference for the reduced data of the site.

Valid reducedData PreferenceObject.value settings are reduce and no-preference.

Value

A PreferenceObject used to override the user's preference for the reduced data of the site.

Examples

Basic usage

This example demonstrates how to query the user's reduced data preference.

js
if (navigator.preferences.reducedData.value === "reduce") {
  // The user prefers you use less data.
} else {
  // The user has stated no preference regarding data use.
}