Form Persistency

Form persistency can be accomplished by the following steps:

• Define a form model definition as a first form state and pass it to the Form component. It will be updated during the form's lifecycle.
• Define an afterAction hook to get the updated form model after each action and store it in a local-storage.

import { Actions } from '@cofi/form';

const localStorageKey = 'user-form';

const saveFormToLocalStorage = ({ model, type }) => {
  if (type !== Actions.DESTROY) {
    localStorage.setItem(localStorageKey, JSON.stringify(model));
  }
};

resources = {
  //...
  hooks: {
    afterAction: saveFormToLocalStorage,
  },
};

• On page load (on refresh) - restore the form model object from the local storage and pass it to the Form component in order to go back to the last state of the form - before the refresh.

import form from './form';

const getModel = () => {
  // Retrieve the model from storage
  const prevModelStringify = localStorage.getItem(localStorageKey);
  return prevModelStringify ? JSON.parse(prevModelStringify) : form.model;
};

const model = getModel();

<Form model={model} resource={form.resources}>

See advanced demo in Form Persistency Demo.