api.getState()
Description
Gets the state object that stores current values of most FilterBuilder propertiesUsage
api.getState(): object;
Returns
The method returns an object with the following parameters:
{
  value: {}; //an object that stores all the filters in a tree-like structure
  fields: [];// the list of fields
  options: {}; //the list of options for each field
}  
Properties description you can find here: FilterBuilder properties overview
Example
import { getData } from "./common/data";
import { FilterBuilder } from "@svar-ui/react-filter";
const { value, fields, options } = getData();
const init = (api) => {
  const { fields } = api.getState();
  console.log(fields); // outputs the list of fields to console
};
export default function App() {
  return (
    `<FilterBuilder
      value={value}
      options={options}
      fields={fields}
      init={init}
    />`
  );
}
Related articles: How to access FilterBuilder API