verificator/es/rules/json.js

Client and server-side validation JavaScript library

const validate = (attribute, value, parameters, validator) => {
    if (!(/boolean|number|string/).test(typeof value)) {
        return false;
    }
    try {
        const json = JSON.parse(value);
        return (/boolean|number|object/).test(typeof json);
    }
    catch (e) {
        return false;
    }
};
export default validate;