@maplibre/maplibre-gl-style-spec/src/validate/validate_state.ts

a specification for maplibre styles

import {ValidationError} from '../error/validation_error';
import {getType} from '../util/get_type';
import {isObjectLiteral} from '../util/is_object_literal';

interface ValidateStateOptions {
    key: 'state';
    value: unknown;
}

export function validateState(options: ValidateStateOptions): ValidationError[] {
    if (!isObjectLiteral(options.value)) {
        return [
            new ValidationError(
                options.key,
                options.value,
                `object expected, ${getType(options.value)} found`
            )
        ];
    }

    return [];
}