WPT
wpt / webaudio / the-audio-api / the-stereopanner-interface / ctor-stereopanner.html
Spec: Web Audio API ↗
Runs: Chrome 155.0.8041.0 (wpt@4a01b83e3, 2026-09-04) | Firefox 157.0a1 (wpt@e7122b73f, 2026-09-04) | Safari 251 preview (wpt@2c385f65e, 2026-09-04) | Ladybird 1.0-70fb3 (wpt@4a01b83e3, 2026-09-04) | Servo Servo 0.6 (wpt@2c385f65e, 2026-09-04) | Blitz a50cb8971 (wpt@a95401e4e, 2026-09-03)
View on the Blitz WPT dashboard | Open test on wpt.live | wpt.fyi
| Chrome | Firefox | Safari | Ladybird | Servo | Blitz | |
|---|---|---|---|---|---|---|
| Total | 51/51 | 51/51 | 51/51 | 51/51 | 51/51 | NOT RUN |
| Subtest | Chrome | Firefox | Safari | Ladybird | Servo | Blitz |
|---|---|---|---|---|---|---|
| # AUDIT TASK RUNNER STARTED. | PASS | PASS | PASS | PASS | PASS | — |
| Executing "initialize" | PASS | PASS | PASS | PASS | PASS | — |
| Executing "invalid constructor" | PASS | PASS | PASS | PASS | PASS | — |
| Executing "default constructor" | PASS | PASS | PASS | PASS | PASS | — |
| Executing "test AudioNodeOptions" | PASS | PASS | PASS | PASS | PASS | — |
| Executing "constructor with options" | PASS | PASS | PASS | PASS | PASS | — |
| Audit report | PASS | PASS | PASS | PASS | PASS | — |
| > [initialize] | PASS | PASS | PASS | PASS | PASS | — |
| context = new OfflineAudioContext(...) did not throw an exception. | PASS | PASS | PASS | PASS | PASS | — |
| < [initialize] All assertions passed. (total 1 assertions) | PASS | PASS | PASS | PASS | PASS | — |
| > [invalid constructor] | PASS | PASS | PASS | PASS | PASS | — |
| new StereoPannerNode() threw TypeError: "Failed to construct 'StereoPannerNode': 1 argument required, but only 0 present.". | PASS | — | — | — | — | — |
| new StereoPannerNode(1) threw TypeError: "Failed to construct 'StereoPannerNode': parameter 1 is not of type 'BaseAudioContext'.". | PASS | — | — | — | — | — |
| new StereoPannerNode(context, 42) threw TypeError: "Failed to construct 'StereoPannerNode': The provided value is not of type 'StereoPannerOptions'.". | PASS | — | — | — | — | — |
| < [invalid constructor] All assertions passed. (total 3 assertions) | PASS | PASS | PASS | PASS | PASS | — |
| > [default constructor] | PASS | PASS | PASS | PASS | PASS | — |
| node0 = new StereoPannerNode(context) did not throw an exception. | PASS | PASS | PASS | PASS | PASS | — |
| node0 instanceof StereoPannerNode is equal to true. | PASS | PASS | PASS | PASS | PASS | — |
| node0.numberOfInputs is equal to 1. | PASS | PASS | PASS | PASS | PASS | — |
| node0.numberOfOutputs is equal to 1. | PASS | PASS | PASS | PASS | PASS | — |
| node0.channelCount is equal to 2. | PASS | PASS | PASS | PASS | PASS | — |
| node0.channelCountMode is equal to clamped-max. | PASS | PASS | PASS | PASS | PASS | — |
| node0.channelInterpretation is equal to speakers. | PASS | PASS | PASS | PASS | PASS | — |
| node0.pan.value is equal to 0. | PASS | PASS | PASS | PASS | PASS | — |
| < [default constructor] All assertions passed. (total 8 assertions) | PASS | PASS | PASS | PASS | PASS | — |
| > [test AudioNodeOptions] | PASS | PASS | PASS | PASS | PASS | — |
| new StereoPannerNode(c, {"channelCount":1}) did not throw an exception. | PASS | PASS | PASS | PASS | PASS | — |
| node.channelCount is equal to 1. | PASS | PASS | PASS | PASS | PASS | — |
| new StereoPannerNode(c, {"channelCount":2}) did not throw an exception. | PASS | PASS | PASS | PASS | PASS | — |
| node.channelCount is equal to 2. | PASS | PASS | PASS | PASS | PASS | — |
| new StereoPannerNode(c, {"channelCount":0}) threw NotSupportedError: "Failed to construct 'StereoPannerNode': The channelCount provided (0) is outside the range [1, 2].". | PASS | — | — | — | — | — |
| new StereoPannerNode(c, {"channelCount":3}) threw NotSupportedError: "Failed to construct 'StereoPannerNode': The channelCount provided (3) is outside the range [1, 2].". | PASS | — | — | — | — | — |
| new StereoPannerNode(c, {"channelCount":99}) threw NotSupportedError: "Failed to construct 'StereoPannerNode': The channelCount provided (99) is outside the range [1, 2].". | PASS | — | — | — | — | — |
| new StereoPannerNode(c, {"channelCountMode":"clamped-max"}) did not throw an exception. | PASS | PASS | PASS | PASS | PASS | — |
| node.channelCountMode is equal to clamped-max. | PASS | PASS | PASS | PASS | PASS | — |
| new StereoPannerNode(c, {"channelCountMode":"explicit"}) did not throw an exception. | PASS | PASS | PASS | PASS | PASS | — |
| node.channelCountMode is equal to explicit. | PASS | PASS | PASS | PASS | PASS | — |
| new StereoPannerNode(c, {"channelCountMode":"max"}) threw NotSupportedError: "Failed to construct 'StereoPannerNode': StereoPanner: 'max' is not allowed". | PASS | — | — | — | — | — |
| new StereoPannerNode(c, {"channelCountMode":"foobar"}) threw TypeError: "Failed to construct 'StereoPannerNode': Failed to read the 'channelCountMode' property from 'AudioNodeOptions': The provided value 'foobar' is not a valid enum value of type ChannelCountMode.". | PASS | — | — | — | — | — |
| new StereoPannerNode(c, {"channelInterpretation":"speakers"}) did not throw an exception. | PASS | PASS | PASS | PASS | PASS | — |
| node.channelInterpretation is equal to speakers. | PASS | PASS | PASS | PASS | PASS | — |
| new StereoPannerNode(c, {"channelInterpretation":"discrete"}) did not throw an exception. | PASS | PASS | PASS | PASS | PASS | — |
| node.channelInterpretation is equal to discrete. | PASS | PASS | PASS | PASS | PASS | — |
| new StereoPannerNode(c, {"channelInterpretation":"foobar"}) threw TypeError: "Failed to construct 'StereoPannerNode': Failed to read the 'channelInterpretation' property from 'AudioNodeOptions': The provided value 'foobar' is not a valid enum value of type ChannelInterpretation.". | PASS | — | — | — | — | — |
| < [test AudioNodeOptions] All assertions passed. (total 18 assertions) | PASS | PASS | PASS | PASS | PASS | — |
| > [constructor with options] | PASS | PASS | PASS | PASS | PASS | — |
| node1 = new StereoPannerNode(, {"pan":0.75}) did not throw an exception. | PASS | PASS | PASS | PASS | PASS | — |
| node1 instanceof StereoPannerNode is equal to true. | PASS | PASS | PASS | PASS | PASS | — |
| node1.pan.value is equal to 0.75. | PASS | PASS | PASS | PASS | PASS | — |
| < [constructor with options] All assertions passed. (total 3 assertions) | PASS | PASS | PASS | PASS | PASS | — |
| # AUDIT TASK RUNNER FINISHED: 5 tasks ran successfully. | PASS | PASS | PASS | PASS | PASS | — |
| new StereoPannerNode() threw TypeError: "StereoPannerNode constructor: At least 1 argument required, but only 0 passed". | — | PASS | — | — | — | — |
| new StereoPannerNode(1) threw TypeError: "StereoPannerNode constructor: Argument 1 is not an object.". | — | PASS | — | — | — | — |
| new StereoPannerNode(context, 42) threw TypeError: "StereoPannerNode constructor: Value can't be converted to a dictionary.". | — | PASS | — | — | — | — |
| new StereoPannerNode(c, {"channelCount":0}) threw NotSupportedError: "StereoPannerNode constructor: Channel count (0) must be in the range [1, max supported channel count]". | — | PASS | — | — | — | — |
| new StereoPannerNode(c, {"channelCount":3}) threw NotSupportedError: "StereoPannerNode constructor: 3 is greater than 2". | — | PASS | — | — | — | — |
| new StereoPannerNode(c, {"channelCount":99}) threw NotSupportedError: "StereoPannerNode constructor: 99 is greater than 2". | — | PASS | — | — | — | — |
| new StereoPannerNode(c, {"channelCountMode":"max"}) threw NotSupportedError: "StereoPannerNode constructor: Cannot set channel count mode to "max"". | — | PASS | — | — | — | — |
| new StereoPannerNode(c, {"channelCountMode":"foobar"}) threw TypeError: "StereoPannerNode constructor: 'foobar' (value of 'channelCountMode' member of AudioNodeOptions) is not a valid value for enumeration ChannelCountMode.". | — | PASS | — | — | — | — |
| new StereoPannerNode(c, {"channelInterpretation":"foobar"}) threw TypeError: "StereoPannerNode constructor: 'foobar' (value of 'channelInterpretation' member of AudioNodeOptions) is not a valid value for enumeration ChannelInterpretation.". | — | PASS | — | — | — | — |
| new StereoPannerNode() threw TypeError: "Not enough arguments". | — | — | PASS | — | — | — |
| new StereoPannerNode(1) threw TypeError: "Argument 1 ('context') to the StereoPannerNode constructor must be an instance of BaseAudioContext". | — | — | PASS | — | — | — |
| new StereoPannerNode(context, 42) threw TypeError: "Type error". | — | — | PASS | — | — | — |
| new StereoPannerNode(c, {"channelCount":0}) threw NotSupportedError: "Channel count cannot be 0". | — | — | PASS | — | — | — |
| new StereoPannerNode(c, {"channelCount":3}) threw NotSupportedError: "StereoPannerNode's channelCount cannot be greater than 2.". | — | — | PASS | — | — | — |
| new StereoPannerNode(c, {"channelCount":99}) threw NotSupportedError: "StereoPannerNode's channelCount cannot be greater than 2.". | — | — | PASS | — | — | — |
| new StereoPannerNode(c, {"channelCountMode":"max"}) threw NotSupportedError: "StereoPannerNode's channelCountMode cannot be max.". | — | — | PASS | — | — | — |
| new StereoPannerNode(c, {"channelCountMode":"foobar"}) threw TypeError: "Type error". | — | — | PASS | — | — | — |
| new StereoPannerNode(c, {"channelInterpretation":"foobar"}) threw TypeError: "Type error". | — | — | PASS | — | — | — |
| new StereoPannerNode() threw TypeError: "Not enough arguments to "StereoPannerNode.constructor".". | — | — | — | — | PASS | — |
| new StereoPannerNode(1) threw TypeError: "Value is not an object.". | — | — | — | — | PASS | — |
| new StereoPannerNode(context, 42) threw TypeError: "Value is not an object.". | — | — | — | — | PASS | — |
| new StereoPannerNode(c, {"channelCount":0}) threw NotSupportedError: "The operation is not supported.". | — | — | — | — | PASS | — |
| new StereoPannerNode(c, {"channelCount":3}) threw NotSupportedError: "The operation is not supported.". | — | — | — | — | PASS | — |
| new StereoPannerNode(c, {"channelCount":99}) threw NotSupportedError: "The operation is not supported.". | — | — | — | — | PASS | — |
| new StereoPannerNode(c, {"channelCountMode":"max"}) threw NotSupportedError: "The operation is not supported.". | — | — | — | — | PASS | — |
| new StereoPannerNode(c, {"channelCountMode":"foobar"}) threw TypeError: "'foobar' is not a valid enum value for enumeration 'ChannelCountMode'.". | — | — | — | — | PASS | — |
| new StereoPannerNode(c, {"channelInterpretation":"foobar"}) threw TypeError: "'foobar' is not a valid enum value for enumeration 'ChannelInterpretation'.". | — | — | — | — | PASS | — |
| new StereoPannerNode() threw TypeError: "StereoPannerNode() needs one argument". | — | — | — | PASS | — | — |
| new StereoPannerNode(1) threw TypeError: "Not an object of type BaseAudioContext". | — | — | — | PASS | — | — |
| new StereoPannerNode(context, 42) threw TypeError: "Not an object of type StereoPannerOptions". | — | — | — | PASS | — | — |
| new StereoPannerNode(c, {"channelCount":0}) threw NotSupportedError: "Invalid channel count". | — | — | — | PASS | — | — |
| new StereoPannerNode(c, {"channelCount":3}) threw NotSupportedError: "StereoPannerNode does not support channel count greater than 2". | — | — | — | PASS | — | — |
| new StereoPannerNode(c, {"channelCount":99}) threw NotSupportedError: "StereoPannerNode does not support channel count greater than 2". | — | — | — | PASS | — | — |
| new StereoPannerNode(c, {"channelCountMode":"max"}) threw NotSupportedError: "StereoPannerNode does not support 'max' as channelCountMode.". | — | — | — | PASS | — | — |
| new StereoPannerNode(c, {"channelCountMode":"foobar"}) threw TypeError: "Invalid value 'foobar' for enumeration type 'ChannelCountMode'". | — | — | — | PASS | — | — |
| new StereoPannerNode(c, {"channelInterpretation":"foobar"}) threw TypeError: "Invalid value 'foobar' for enumeration type 'ChannelInterpretation'". | — | — | — | PASS | — | — |