React is, to my knowledge, the first library, to introduce declarative programming to the front-end world.
REDUX SAGA CODE
One had to think about everything, the code was verbose and hard to maintain.
REDUX SAGA UPDATE
Out, the de facto way of building JavaScript apps was to manipulate the DOM in a procedural way, meaning every change of content, style,Ĭolor, every update of your UI had to be explicitly described. Realize this, but when React came out about 5 years ago, it changed the way we build front-end applications forever. If you started front-end development recently, you might not React and Redux and the impact they had on front-end development. In order to explain the philosophy behind something like Redux Saga, I’d like to take a step back and look at the philosophy of The importance of declarative programming How this approach keeps your application from scaling up, and why we need something like Redux-Saga to build enterprise-classĪpplications. Most likely in the componentDidMount hook. If you’re developing React applications, you may be used to performing your API calls directly in your components, Illustrations are slides form the presentation. This article is the transcript to a talk I gave in Lille, France entitled Redux Saga: side effects and scalability. Model for Redux applications that makes side effects transactions easier to write, reason about and test. Some of us have known this for a long time now, and this is why clever people have come up with ways to deal with sideĮffects in applications: IO monads, Actors, isolated threads … Redux Saga is one of these solutions. Instability and incertitude to the perfect world you’re striving to build. Any external API call, any storage interaction, any DOM event handler is adding Side effects, being this necessary connection to the outside world, are unreliable, We build independent, confined little worlds of abstractions that we can control, understand and predict.īut at the end of the day, for most jobs, we need some connection to the chaos of the outside world.
Our job as developers is to build abstractions that solve Let me get this out of the way: side effects are evil.
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