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The Window.devicePixelRatio read-only property returns the ratio of the (vertical) size of one physical pixel on the current display device to the size of one device independent pixels(dips).

There are no callbacks or events to listen to when this value changes (for example, if you drag the window between displays with different densities).


value = window.devicePixelRatio;


Specification Status Comment
CSS Object Model (CSSOM) View Module
The definition of 'Window.devicePixelRatio' in that specification.
Working Draft Initial definition

Browser compatibility

Feature Chrome Firefox (Gecko) Internet Explorer Opera Safari
Basic support ? ? ? ? ?
Feature Android Firefox Mobile (Gecko) IE Mobile Opera Mobile Safari Mobile
Basic support ? ? ? ? ?

See also

Document Tags and Contributors

 Last updated by: jsx,