This is the documentation of version 0.61.0. Go to the latest version, 1.0.0-rc.5.

Function validateKnobValue

validateKnobValue(knob: KnobEntry<string>, value: unknown): void
Checks a value against a catalogue entry: its kind, its options, and its range as far as the range's bounds hold.
Parameters
- knob: KnobEntry<string>
  The knob's entry in its catalogue.
- value: unknown
Returns void
Remarks
A color must parse as a CSS colour. An image or text value need only be a string; whether the sprite has the image is known on a loaded map only.

Throws
RangeError naming the knob and what it expects, for a value it does not take.
Example
```
const knob = trafficIncidentsKnobCatalogue.find(({ id }) => id === 'filters.any.0.magnitudes.values');
validateKnobValue(knob, ['major', 'severe']); // RangeError: … 'severe' is not
```