![]() For example, Redux's focus on serializability for time travel debugging has allowed people to build a number of add-ons that persist state and even sync it between different apps. Second, while they both solve the same issue of storing state and managing updates, their approaches are different enough that people will generally pick one or the other for certain reasons. Part of that is that Redux came out first, part is that Redux has more overall publicity and mindshare, part is that Redux is pretty minimal and acts as a good starting point for others to build stuff on top of. Redux has a thriving ecosystem of add-ons and utilities at this point, way more than what MobX has available. First, there's a difference between what the actual libraries do by themselves, and what the ecosystems have produced. Mobx takes a bit of thinking to be truly safe, but with a few rules it can be as easy to debug as a redux codebase.Ĭouple things. You never know where things are being mutated from, because they are right in the same file :) I find this verbose, but less verbose than redux, and equally safe.Īnyways, to summarize, redux is by default pretty safe. We follow a rule where actions can only modify the class they are defined, and that keeps things extremely explicit. For example if a Student class has an action that mutates a Grade object directly, it's hard to trace! That's what redux will guard against, you see a 'CHANGE_GRADE' action or something and find out what triggered the action. ![]() So I can definitely see bad codebases with mobx, depending on how actions are organized and what each action can mutate. The unsafe part is you can put the actions anywhere, and they can mutate any observable. Mobx keeps mutations in one type of function so it's as functional as redux is. The mutation step can also be a bit trickier in mobx - Mutation(mobx.action changes observable which can trigger more actions through torun).įor this reason, I hardly use autorun. In redux, the mutation is done through an emitted Action that triggers the framework to run a Reducer to figure out how the state should be changed. In front-end, it's the updates that cause issues.Ī mobx app's update path is like this: User Action -> Mutation (mobx.action mutates a mobx.observable in some way) -> Computed properties recompute (puted) -> Component Re-rendersĪs you can see, it's very similar to redux. In the rendering path, (from data -> rendering), you have a few observables, and a lot of computed properties based off them. But from the perspective of the app, a unit of change is made to the app state.Ī mobx app's rendering path is very functional. ![]() ![]() Mobx directly mutates the state object and uses that fact to power recomputations, while redux replaces the app state with a new object containing your desired change. The difference is in how you organize your units of mutations - in redux you put them in reducers which receive action events, in mobx you put them in actions which you call directly. The biggest difference between redux and mobx is not that mobx mutates state, because redux also mutates (through reducers). What has been your experience in real-world-scenarios (whatever that means) with mobx? I think redux does a shallow comparison of props to determine if a render should happen, but mobx handles deep updates very efficiently. At first glance, it seems very percise, requiring no monkeying with shouldComponentUpdate. I can see myself easily rolling my own form components in mobx with little overhead and streamlined for exactly what I need.Īlso, mobx seems to handling re-rendering more efficiently. To me, it seems that redux is full of middleware and reducer packages on npm that wouldn't be needed in mobx, due to simplicity. What are people thinking these days on the two?ĭo you see mobx ever reaching the same level of mind-share as redux?Īre you willing to sacrifice boilerplate/immutability for a simple and easy to read object-oriented structure? I am thinking about giving it a shot on a new project. However, mobx made me realize how much boilerplate I have been accustomed to. I have been involved with redux, and I like it.
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