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    1.3.0 • Public • Published


    Async and RESTful resource management tool.

    npm version license downloads codecov


    Often we consume RESTful APIs, like for a CRUD, using reactive UIs (with React or not). And there are a few state scenarios always present and our UI demands some questions to be answered:

    • Loading state
      • Is the loading a creation request and you want to disable or hide the creation form buttons?
      • Is the loading a reading operation and only a blinking skeleton is supposed to fill that table?
      • Or maybe you're updating a single row and you only want to disable that specific row action buttons with a cute spinning instead of disabling that creation form?
      • What if the loading is actually a deleting action?
      • And if all of that is happening at the same time?
      • Did you consider these loadings to have a minimal (and pleasant) delay?
    • Easy feedback for no data found
    • Stacking error messages
    • Repetitive fetching messages
      • For example, success messages for when something was successfully deleted
      • Another example, an error message when some specific request HTTP verb failed
    • Data fetching itself
      • Bored of having to write the same filter when you remove elements for your data?
      • Or tired of writing the same map for editing?
      • Or being confused with all that spread and rest operations for adding new stuff?

    While this is not a UI lib, it's a state helper to automate all of these state changes above. It's type safed, has high test coverage (written with TDD). Your code commits using this for repetitive CRUDs will be short, readable, safer by pure automation. You'll be free to focus on crafting other complex designed behaviours.

    This lib is a composition mostly pure functions (based on Reducer pattern), so It's also supposed to be easily integrated on any state manager you're using, like Redux, MobX or just raw React Hooks (or even class-based life cycle methods).


    npm install --save resource-toolkit


    You may already see a running To Do List application here, crafted for didactic reasons with a friend: https://github.com/Mazuh/octo-todo (warning: it is currently using an old version unstable version)


    Here are a few dumb examples in React.

    Simple example for fetching all

    import React from "react";
    import { makeReducerAssets } from 'resource-toolkit';
    const usersResource = makeReducerAssets({
      name: 'user',
      idKey: 'userId',
      gateway: {
        fetchMany: async (ids = null, ...args) => {
          return [
            { userId: 42, name: 'Marcell' },
            { userId: 11, name: 'David' },
            { userId: 22, name: 'Rodrigo' },
    export default function App() {
      const [users, dispatch] = React.useReducer(usersResource.reducer, usersResource.initialState);
      React.useEffect(() => {
      }, [dispatch]);
      if (users.isLoading) {
        return <p>Doing something...</p>;
      if (users.items.length === 0) {
        return <p>No users found.</p>;
      return (
            {users.items.map(user => (
              <li key={user.userId}>{user.name}</li>

    More complete usage demonstration

    Check it out on CodeSandbox: https://codesandbox.io/s/resource-toolkit-usage-7h9td?fontsize=14&hidenavigation=1&theme=dark

    Feel free to fork it and test the features by yourself.


    Please consult CONTIRBUTING for guidelines on contributing to this project.


    resource-toolkit © Mazuh, Released under the MIT License.


    npm i resource-toolkit

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