ConstrainLong

The ConstrainLong type is used to specify a constraint for a property whose value is an integral number. It extends the LongRange dictionary (which provides the ability to specify a permitted range of property values) to also support an exact value and/or an ideal value the property should take on. In addition, you can specify the value as a simple long integer value, in which case the user agent does its best to match the value once all other more stringent constraints are met.

Properties

If the value of a ConstrainLong is an object rather than a number, it may have the properties below in addition to the properties it inherits from LongRange.

exact

An integer specifying precise, required, value the property must have to be considered acceptable.

ideal

An integer specifying a value the property would ideally have, but which can be considered optional if necessary to find a match.

Specifications

Browser compatibility

See also

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