Device memoryLimited availability
The navigator.deviceMemory property is the approximate amount of device memory, in gigabytes.
Not yet supported in all major browsers — check the table and provide a fallback.
Browser support
DesktopChrome
1–96Not supported
97+Supportedsince Jan 4, 2022
Current: 155Edge
12–96Not supported
97+Supportedsince Jan 6, 2022
Current: 154Firefox
✕Not supportedup to 157
Current: 157Safari
✕Not supportedup to 27
Current: 27MobileChrome Android
18–96Not supported
97+Supportedsince Jan 4, 2022
Current: 155Firefox Android
✕Not supportedup to 157
Current: 157Safari iOS
✕Not supportedup to 27
Current: 27How to use
Not supported in Firefox, Safari, Firefox Android, Safari iOS. Use feature detection below and provide a fallback (or a polyfill) for those browsers.
Example
Full syntax and examples are on MDN: deviceMemory.
Feature detection
JS · check before using
if ("Navigator" in globalThis && "deviceMemory" in Navigator.prototype) {
// Navigator.deviceMemory is available
}Documentation (MDN)
Specification
Sub-features
Support for each part of the feature (3). The overall table above shows when the whole feature works.
| Sub-feature | Chrome | Edge | Firefox | Safari | Chrome Android | Firefox Android | Safari iOS |
|---|---|---|---|---|---|---|---|
| Navigator.deviceMemory | 63 | 79 | ✕ | ✕ | 63 | ✕ | ✕ |
| WorkerNavigator.deviceMemory | 65 | 79 | ✕ | ✕ | 65 | ✕ | ✕ |
| http.headers.Sec-CH-Device-Memory | 97 | 97 | ✕ | ✕ | 97 | ✕ | ✕ |