Titania X3D Editor

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Titania v4.6.10

Bring Colours to Your Life.

X3D Reference



LoadSensor generates events as watchList child nodes are either loaded or fail to load. Changing watchlist child nodes restarts the LoadSensor.

The LoadSensor node belongs to the Networking component and its container field is children. It is available since X3D version 3.0 or later.



SFNode [in, out] metadata NULL [X3DMetadataObject]

Metadata are not part of the X3D world and not interpreted by the X3D browser, but they can be accessed via the ECMAScript interface.

SFBool [in, out] enabled TRUE

Enables/disables node operation.

SFTime [in, out] timeOut

Time in seconds of maximum load duration prior to declaring failure. Default value zero means use browser defaults.

SFBool [out] isActive

IsActive true/false events are sent when sensing starts/stops.

SFBool [out] isLoaded

Notify when all watchList child nodes are loaded, or at least one has failed. Sends true on successfully loading all watchList child nodes. Sends false on timeOut of any watchList child nodes, failure of any watchList child nodes to load, or no local copies available and no network present.


Use multiple LoadSensor nodes to track multiple loading nodes individually.

SFFloat [out] progress

Sends 0.0 on start and 1.0 on completion. Intermediate values are browser dependent and always increasing (may indicate fraction of bytes, fraction of expected time or another metric).


Only 0 and 1 events are guaranteed.

SFTime [out] loadTime

Time of successful load complete, not sent on failure.

MFNode [in, out] watchList [ ] [X3DUrlObject]

Input/Output field watchList.



  • Use multiple LoadSensor nodes to track multiple loading nodes individually.
  • Background is not sensed due to multiple-image ambiguity.
  • Use Inline 'load' field to prompt or defer loading.


  • WatchList child nodes are not rendered, so normally USE copies of other nodes to sense load status.
  • New X3D node, not supported in VRML97.


screenshot LoadSensor

XML Encoding

Classic Encoding

JSON Encoding

Browser Compatibility

Titania X_ITE
yes yes

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