sceneryPhetQueryParameters and isResettingAllProperty

sceneryPhetQueryParameters and isResettingAllProperty (both from scenerystack/scenery-phet) are two small, unrelated top-level values grouped on this page because neither is big enough to justify its own: one is a QueryStringMachine.getAll(...) schema object (see the Query Parameters Pattern for the general mechanism), the other is a single global boolean flag Property.

import { sceneryPhetQueryParameters, isResettingAllProperty } from 'scenerystack/scenery-phet';

sceneryPhetQueryParameters

sceneryPhetQueryParameters.backgroundColor; // string, defaults to 'white'
sceneryPhetQueryParameters.fontFamily;      // string, defaults to 'Arial'

Parameter	Type	Default	Effect
backgroundColor	string	'white'	Any CSS color format ('green', 'ff8c00', 'rgb(255,0,255)')
fontFamily	string	'Arial'	Any CSS font-family-compatible string

This is scenery-phet's internal demo-application schema, not a general sim query-parameter API

The source file's own doc comment labels these "Query parameters for the scenery-phet demo application" — the small internal gallery app used to visually exercise every scenery-phet component during development. They control that demo app's own screen background and font, not anything about how scenery-phet components behave inside a real simulation. If you're looking for a real sim's own query-parameter conventions, see the Query Parameters Pattern and QueryStringMachine.getAll instead — most libraries define their own <library>QueryParameters module the same way this one does, but this specific instance isn't meant to be read by application code.

isResettingAllProperty

A single, always-present TProperty<boolean> (backed by a TinyProperty, so it isn't disposable and isn't PhET-iO instrumented) that is true for the duration of any "reset all" in progress, and false otherwise.

isResettingAllProperty.lazyLink( isResetting => {
  if ( isResetting ) {
    // e.g. suppress a sound effect that would otherwise fire from the reset itself
  }
} );

ResetAllButton is the sole writer: it sets isResettingAllProperty.value = isFiring as its own pushButtonModel.isFiringProperty changes, so the flag flips true right as the button starts firing and back to false once the reset's callbacks finish. scenery-phet's sound-generation base class (SoundGenerator, in scenerystack/tambo) reads it as one of several inputs to its fullyEnabledProperty, muting sound generators for the duration of a reset so a cascade of Property resets doesn't trigger a burst of individual sound effects.

A shared global, not scoped per-screen

There is exactly one isResettingAllProperty for the whole runtime — it isn't tied to a specific ScreenView or model. If two ResetAllButtons exist (unusual, but possible in a multi-screen sim with per-screen reset buttons active simultaneously in some embedded context), they both read and write the same flag.