NullableIO¶

Overview¶

Parametric IOType that adds support for null values in toStateObject/fromStateObject. This type is to prevent the propagation of null handling, mainly in to/fromStateObject, in each type. This also makes null explicit for phet-io.

Sample usage:

this.ageProperty = new Property( null, { tandem: tandem.createTandem( 'ageProperty' ), phetioValueType: NullableIO( NumberIO ) // signifies that the Property can be Number or null } );

@author Michael Kauzmann (PhET Interactive Simulations) @author Sam Reid (PhET Interactive Simulations)

Source Code¶

See the source for NullableIO.ts in the tandem repository.