@mapbox/mapbox-gl-style-spec/validate/validate_boolean.ts

a specification for mapbox gl styles

import getType from '../util/get_type';
import ValidationError from '../error/validation_error';

import type {ValidationOptions} from './validate';

export default function validateBoolean(options: ValidationOptions): Array<ValidationError> {
    const value = options.value;
    const key = options.key;
    const type = getType(value);

    if (type !== 'boolean') {
        return [new ValidationError(key, value, `boolean expected, ${type} found`)];
    }

    return [];
}