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.
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
ideal
Specification | Status | Comment |
---|---|---|
Media Capture and Streams The definition of 'ConstrainLong' in that specification. | Editor's Draft | Initial definition |
Technically, ConstrainLong
is actually based on an intermediary dictionary named ConstrainLongRange
, which adds exact
and ideal
to LongRange
, with ConstrainLong
being a type that can be either a long integer or a LongRange
. However, for the sake of documentation clarity, the intermediate type (present only because of quirks in WebIDL syntax) is ignored here.
Feature | Chrome | Firefox (Gecko) | Internet Explorer | Microsoft Edge | Opera | Safari (WebKit) |
---|---|---|---|---|---|---|
Basic support | (Yes) | 50 (50) | No support | ? | No support | ? |
Feature | Android | Android Webview | Firefox Mobile (Gecko) | IE Phone | Opera Mobile | Safari Mobile | Chrome for Android |
---|---|---|---|---|---|---|---|
Basic support | ? | (Yes) | 50.0 (50) | No support | No support | ? | (Yes) |
LongRange
MediaTrackConstraints
MediaTrackCapabilities
MediaTrackSupportedConstraints
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Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://developer.mozilla.org/en-US/docs/Web/API/ConstrainLong