getFields() method

getFields(): Object

const fv = FormValidation.formValidation(
    document.getElementById('demoForm'),
    {
        ...
    }
);

const fields = fv.getFields();

import formValidation from 'formvalidation/dist/es6/core/Core';

const fv = formValidation(
    document.getElementById('demoForm'),
    {
        ...
    }
);
const fields = fv.getFields();