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Global State and Logic Framework

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๐Ÿ‘‹ Introduction#

AgileTs is a global, simple, well-tested State Management Framework implemented in Typescript. It offers a reimagined API that focuses on developer experience and allows you to easily manage your States. Besides States, AgileTs offers some other powerful APIs that make your life easier. The philosophy behind AgileTs is simple:

๐Ÿš… Straightforward#

Write minimalistic, boilerplate-free code that captures your intent.

MY_STATE.set('jeff'); // Update State value
MY_STATE.undo(); // Undo latest State value change{hello: "jeff"}); // Check if State has the value '{hello: "jeff"}' => {console.log(value);}); // Watch on State changes

Some more straightforward syntax examples:

  • Store State in any Storage, like the Local Storage
  • Create a reactive Array of States
    const MY_COLLECTION = App.createCollection();
    MY_COLLECTION.collect({id: 1, name: "Frank"});
    MY_COLLECTION.collect({id: 2, name: "Dieter"});
  • Compute State depending on other States
    const MY_INTRODUCTION = App.createComputed(() => {
    return `Hello I am '${MY_NAME.vale}' and I use ${MY_STATE_MANAGER.value} for State Management.`;

๐Ÿคธโ€ Flexible#

  • Works in nearly any UI-Layer. Check here if your preferred Framework is supported too.
  • Surly behaves with the workflow which suits you best. No need for reducers, actions, ..
  • Has 0 external dependencies

โ›ณ๏ธ Centralize#

AgileTs is designed to take all business logic out of UI-Components and put them in a central place, often called core. The benefit of keeping logic separate to UI-Components is to make your code more decoupled, portable, scalable, and above all, easily testable.

๐ŸŽฏ Easy to Use#

Learn the powerful tools of AgileTs in a short amount of time. An excellent place to start are our Quick Start Guides, or if you don't like to follow any tutorials, you can jump straight into our Example Section.

โณ Quick Example#

Instead of talking too much about the benefits of AgileTs, we should rather see them in action.

๐Ÿ˜Ž Create State#

// -- core.js ------------------------------------------
// 1๏ธโƒฃ Create Instance of AgileTs
const App = new Agile();
// 2๏ธโƒฃ Create State with help of before defined Agile Instance
const MY_FIRST_STATE = App.createState("Hello Friend!");
// -- MyComponent.whatever ------------------------------------------
// 3๏ธโƒฃ Bind initialized State to desired UI-Component
// And wolla, it's reactive. Everytime the State mutates the Component rerenders
const myFirstState = useAgile(MY_FIRST_STATE); // Returns value of State ("Hello Friend!")

Want to learn more? Check out our Quick Start Guides.

โ›ณ๏ธ Sandbox#

Test AgileTs yourself in a codesandbox. It's only one click away. Just select your preferred Framework below.

More examples can be found in the Example Section.

๐Ÿ‘จโ€๐Ÿ’ป When using AgileTs#

AgileTs is thought to handle the States of the business logic and logic in general that isn't explicitly bound to a Component. This includes, for example, server caching States like the logged-in user. AgileTs wasn't built to handle UI States like isModalOpen. Therefore, AgileTs should be used as a friend and helper to outsource all business logic from UI-Components.

๐ŸŸฆ Typescript#

AgileTs is 99% written in Typescript and offers an excellent type-safety.

๐Ÿ‘ฎ Data Flow#

Log Custom Styles Example


In State-Management, the Data-Flow more or less starts and ends in the UI-Component. For example, if we click a Button, we trigger an action that resolves in a UI change. So by clicking a Theme Button, we start an action that changes the color theme of the current site. In order that this color change can visibly happen, the Component has to rerender. For this, we need to subscribe/bind the State (THEME_STATE) to the UI-Component, with, for instance, the useAgile() hook. Such subscription is essential to rerender the Component whenever the subscribed State mutates.

// ..
onClick={() => {
// ..


The action, triggered by the Theme Button, then mutates the actual THEME_STATE and might do some side calculations. We can also omit this step and edit the State directly in the UI-Component. Everyone as he likes. However, I prefer separating UI-Component logic from global/business logic.

const toggleTheme = () => {


Now we come to the inner workings of AgileTs, i.e. what the actual AgileTs user no longer sees from the outside. After the State has been mutated, it will notify the Observer. Each State has its own Observer, which serves as an Interface to the Runtime and keeps track of the subscribed UI-Components.

// ..
THEME_STATE.ingestValue(/* new value of THEME_STATE */);
// ..


The Observer then creates a Job and passes it to the Runtime. The created Job has a reference to the Observer itself in order to perform the actual action and rerender the correct UI-Components.

// ..
// ..


The main task of the Runtime is to queue Jobs and avoid race conditions. It also combines rerender tasks if multiple Jobs try to rerender the same Component. Firstly the Runtime processes all pending Jobs by calling a function in the Observer, which mutates the actual State value. Also, it collects the rerender tasks of the individual Jobs. If there are no more pending Jobs, it starts processing the rerender tasks.

// ..;
// ..


A side effect of running a Job is the rerendering of subscribed Components. Another could be the persisting into a permanent Storage or rebuilding the Group output.

// ..
subscriptionContainer.callback(); // If Component based Subscription
// ..

๐Ÿ‘จโ€๐Ÿซ Learn AgileTs#

We have a variety of resources available to help you learn AgileTs. An excellent place to start are our Quick Start Guides, where you learn the basics about how to use AgileTs in a specific Framework. After knowing the ground concept of AgileTs, we recommend checking out the Style Guides. The Style Guides will help you to get some inspiration on structuring a scalable application using AgileTs. Now you are ready to use AgileTs wherever you want. If you need some more information about some functionalities of AgileTs, use the search bar in the top right corner. And in case you have any further questions, don't hesitate to join our Community Discord.

๐Ÿข Structure of Documentation#

๐Ÿ“ AgileTs#

You are currently in the AgileTs section, which serves as source for general topics like the Style Guide or a general Installation Guide.

๐Ÿ“ Quick Start#

The Quick Start Section is all about how to get AgileTs up and running in different environments like React or Vue. In each Quick Start Guide the basics of some AgileTs classes (like the State) are covered too.

๐Ÿ“ Packages#

In the packages section all the AgileTs packages are listed. For instance the core and the react package. If you click on one of them, it will reveal you an Introduction about the package, an Installation Guide and all its features. In case of the core package you find the State and Collection documentation in the Features Section. Be aware that โš ๏ธ WIP isn't an actual package. It is meant to separate packages that are currently work in progress and not ready for the outer world from the stable packages.

๐Ÿ“ Examples#

Some interactive examples can be found in the example section.

๐Ÿ“ Interfaces#

Without any context this Section might be useless to you. As the name suggests, it's all about typescript interfaces of AgileTs, which are outsourced for a better overview. You might get redirected to parts of the Interface Section from other documentation sections. Often to learn some more about specific properties of an interface.

๐Ÿค“ Glossary#

In these docs, we will refer to our classes with a capital first letter. For example, when you see 'state', we refer to the programming concept state, but when you see 'State', we are referring to our State class.

Agile Sub Instance#

Instances that hold a reference to the Agile Instance and depend on its functionalities.


Interface to the runtime which keeps track of subscribed UI-Components and performs the actual State action executed by the runtime.


Queues and executes passed Jobs holding an Observer and performs rerender on subscribed UI-Components.

๐Ÿ’ฌ What others say#

Actually, nothing, yet. If you want to be the first one, don't mind tweeting whatever you think about AgileTs. But don't forget to tag @AgileFramework. Otherwise, we can't find your tweet.

๐ŸŒ History of AgileTs#

After exploring the many options of Javascript State libraries, including the popular Redux and MobX. I felt like I need a simpler, more straightforward solution. One day I accidentally stumbled across a stream from @jamiepine. Jamie was using an interesting approach of State Management which I haven't seen yet. The Framework he used was PulseJs, the ancestor of AgileTs, so to speak.

I liked this concept of State Management a lot and started using it in my own projects. At this point in time (spring 2020), it wasn't officially released. Therefore, it was quite buggy and had no documentation. But I figured out how to use it anyway and saved my finding in a small pre-documentation for PulseJs fellows.

The months went by, and no stable version came out. Not even an npm package. In July, I came to the conclusion to contribute to PulseJs, in order to speed up the development process a bit. But before I could do anything, I had to figure out how PulseJs works internally. After hours, I still haven't figured out how it works. This was due to the fact that I was a Typescript noob, and the codebase was not contributor friendly (No comments, variables called x, a, b, ..). To learn how PulseJs works and to get a deeper understanding of Typescript, I decided to rewrite PulseJs from scratch in a separate project, later AgileTs. After a while, I got the hang and understood how PulseJs works under the hood.

Now that I knew how PulseJs works, I could finally start contributing. My first contribution was on the 16th August 2020, where I refactored the PulseHOC. Unfortunately, PulseJs was moving further and further away from my idea of an ideal State Management Framework. For instance, they introduced the Pulse.Core, which more or less forced me to define all States, Actions in a single object called core. I wouldn't say I liked that change since I switched, among other reasons, to PulseJs in order not to define all my States in a single object. Because of this relatively significant design change, I would have to rebuild my entire State Management Logic of my applications. Which I didn't want to do because I liked the old concept more.

Luckily I had the refactored PulseJs version lying around, which I created to learn how PulseJs works internally and released it as an own framework called agile-architecture. Agile-Architecture was at that point just an old refactored version of PulseJs without the Pulse.Core. Another reason I turned away from PulseJs, besides the different visions, was the leak of organization. Some of my changes never got merged into the master branch. Why? Idk. But I am sure that it was not intentional. For instance, I fixed an annoying usePulse type issue, and eight months later, it is still not merged into the master. Why should I contribute if my changes, which fixed a problem I had, will never be in a release version?

Now that I had my own State Management Framework, I had more control and adapted it to my needs. Over time AgileTs evolved away from PulseJs with other visions and goals. During this time, I rewrote and optimized all internal classes, created tests, and wrote a documentation. Today AgileTs has only a similar syntax to PulseJs. Internal, it works quite differently.

Conclusion: The idea of AgileTs is based on PulseJs, and I would have loved to continue working on PulseJs. But certain circumstances, such as a poor organization and different visions, have driven me to write my own State Manager based on the excellent ground concept of PulseJs and MVVM frameworks.

๐ŸŽ‰ Credits#

AgileTs is inspired by MVVM frameworks like MobX or PulseJs.

โ“ Something missing#

If you find issues with the documentation or have suggestions on how to improve the documentation or the project in general, please file an issue for us or join our Community Discord and notice it in the #issue channel.

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