Secure context
This feature is available only in secure contexts (HTTPS), in some or all supporting browsers.
This is an experimental technology
Check the Browser compatibility table carefully before using this in production.
The deviceMemory read-only property of the Navigator interface returns the approximate amount of device memory in gigabytes.
The reported value is imprecise to curtail fingerprinting. It’s approximated by rounding down to the nearest power of 2, then dividing that number by 1024. It is then clamped within lower and upper bounds to protect the privacy of owners of very low- or high-memory devices.
Syntax
memoryAmount = navigator.deviceMemory
Value
A floating point number; one of 0.25, 0.5, 1, 2, 4, 8.
Example
const memory = navigator.deviceMemory
console.log (`This device has at least ${memory}GiB of RAM.`)
Specifications
| Specification | Status | Comment |
|---|---|---|
| Device Memory 1 The definition of 'deviceMemory' in that specification. |
Editor's Draft | Initial definition. |
Browser compatibility
The compatibility table on 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.
See also
- Device Memory API
Device-MemoryHTTP header