Screen: mozBrightness property

Indicates how bright the screen’s backlight is, on a scale from 0 (very dim) to 1 (full brightness); this value is a double-precision float.

You can read and write this attribute even when the screen is disabled, but the backlight is off while the screen is disabled. If you write a value of X into this attribute, the attribute may not have the same value X when you later read it. Most screens don’t support as many different brightness levels as there are doubles between 0 and 1. The value’s precision might be reduced before storing it.

Value

A number.

Specifications

Not part of specification.

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