ra-core/src/controller/input/useSimpleFormIterator.ts

Core components of react-admin, a frontend Framework for building admin applications on top of REST services, using ES6, React

import { useContext } from 'react';
import { SimpleFormIteratorContext } from './SimpleFormIteratorContext';

/**
 * A hook that provides access to a SimpleFormIterator data (the total number of items) and mutators (add, reorder and remove).
 * Useful to create custom array input iterators.
 * @see {SimpleFormIterator}
 * @see {ArrayInput}
 */
export const useSimpleFormIterator = () => {
    const context = useContext(SimpleFormIteratorContext);
    if (!context) {
        throw new Error(
            'useSimpleFormIterator must be used inside a SimpleFormIterator'
        );
    }
    return context;
};