This is the documentation of version 0.62.0. Go to the latest version, 1.0.0-rc.5.
TomTom Maps for JavaScript
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    Type Alias StylingSettings

    StylingSettings: MapModuleCommonConfig & {
        [K in StylingKnobId]?: StylingKnobValueOf<K>
    }

    A serializable set of styling knob values — what StylingModule.getConfig returns and StylingModule.applyConfig accepts. Persist it, put it in a pull request, or ship it as a preset: re-applying it on a later SDK version keeps working for as long as the knob ids do.

    const settings: StylingSettings = {
    'labels.sizeFactor': 1.2,
    'roads.exitNumbers': false,
    'traffic.flow.slowColor': '#f59e0b',
    };
    styling.applyConfig(settings);