ConstrainBoolean

The ConstrainBoolean dictionary is used to specify a constraint for a property whose value is a Boolean value. You can specify an exact value which must be matched, an ideal value that should be matched if at all possible, and a fallback value to attempt to match once all more specific constraints have been applied.

Properties

exact

A Boolean which indicates a value the property must have.

ideal

A Boolean value indicating the ideal, but not required, value the property should ideally have. If possible, this value will be used, but the user agent will use the other value if it needs to in order to come up with a workable configuration.

You can also specify the value of the property as simply true or false, in which case the user agent will use that value if possible once all efforts have been made to match the exact and ideal values for other properties.

Specifications

Specification	Status	Comment
Media Capture and Streams The definition of 'ConstrainBoolean' in that specification.	Editor's Draft	Initial definition

Browser compatibility

See also

• Media Capture and Streams API
• Capabilities, constraints, and settings
• MediaTrackConstraints
• MediaTrackCapabilities
• MediaTrackSupportedConstraints