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Questions tagged [mobx]

Functional reactive programming library in JavaScript.

About

MobX is a battle tested library that makes state management simple and scalable by transparently applying functional reactive programming. The philosophy behind MobX is very simple:

Anything that can be derived from the application state, should be derived. Automatically.

which includes the UI, data serialization, server communication, etc.

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MobX - Reset all store observables back to initial state?

Given a MyQuestionStore store: class MyQuestionStore { @observable asked = 'today'; @observable answered = false; @observable question = { upvotes: 0, body: null, asker: null, askerPoints: null, askerBadges: null } //…
Wonka
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Two ways of defining ES6 React Components

I was looking at this fiddle for MobX and I've seen these two ways of defining React Components in ES6 other places as well, like Dan Abramov's egghead redux video series. @observer class TodoListView extends Component { render() { …
Grant Eagon
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Error: [mobx-state-tree] Failed to resolve reference XXX to type 'User'

Context I have a React application that is backed by mobx-state-tree (MST). One of the pages makes two parallel API calls to fetch a list of Projects and a list of system Users. The responses of these two APIs are then applied as snapshot to two…
Igor Soloydenko
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MobX performance when replacing observable data

I need to replace data in my observable object when I get a new dump from the socket: class Store { @observable data = { foo: 'bar' } replaceFromDump(newData) { this.data = newData } } const store = new…
David Hellsing
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React: Don't render components in table who aren't visible

I have a table with >30 rows and >50 columns. Each row and each cell is a specific React component, since you can manipulate them and they change behaviour and look based on changing data. So my component hierachy looks like this: Grid -> Row ->…
Johannes Klauß
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How to get a plain object from mobx object?

I defined a mobx map as below: @observable editors = observable.map(); then I added object on the editors as below: editors.set(key, { alias: 'alias-1', message: 'hello', }) when I get the object from editor as below: let myEditor =…
Joey Yi Zhao
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React + Mobx: 'this' is null when trying to update store

Just getting started with Mobx & React and having trouble getting the store to update. I get error when clicking the button, which should update the 'me' property: Store.js:12 Uncaught TypeError: Cannot set property 'me' of null My store: import {…
Chris
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Using MobX observable decorators with create-react-app

The MobX docs tell me I must "use the transform plugin transform-decorators-legacy and make sure it is first in the plugins list", in order for the decorators to work. The MobX boilerplate project suggests I need a .babelrc like: { "presets": [ …
Scott
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Mobx performance

I read from different sources that mobx outperforms react renderer and are faster then redux. However if I made couple of tests it shows that adding new data to mobx observables are pretty slow. In react-native environment every milliseconds counts…
Mac
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Is it possible to use React Hooks outside of functional component, or i have to use mobx or redux?

I am new to React, and when I was reading about the docs, I found there were two ways to implement React components, functional-based and class-based. I know before React 16.8 it's not possible to manage state in functional components, but after…
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How to test mobx reaction?

Note: This is not a real App but a distilled version of the problem. I have a simple application fake Todo that uses @computed to get the value of TodoItemComputed.isSelected: import { computed, observable, action } from 'mobx'; export class…
Michael_Scharf
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Make typescript see props from decorators

I have simple component that uses mobx and decorators like this import * as React from "react"; import { observer, inject } from "mobx-react/native"; import { Router as ReactRouter, Switch, Route } from "react-router-native"; import Dashboard from…
Ilja
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SyntaxError: 'import' and 'export' may appear only with 'sourceType: module' (1:0)

I keep hitting this error. Its happened a few times recently and now I can't get rid of it. I'm using MobX in my React Native project and so I need something in my .babelrc so I have decorator support: { "presets": ["react-native"], "plugins":…
Adamski
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How to structure mobx

I'm trying to figure out how to structure my app, for example, I have a model User, a generic UserStore to keep track all users load so far and some UI related stores like FriendList, PendingFriendList, BlockedUserList, LikedUserList, etc. like…
Maximiliano Guzenski
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How to use class model with Redux (with a Mobx option)

EDIT: I finally choosed Mobx.js, refer to @mweststrate answer for details. All learning ressources about redux show how to use it with plain object models. But I can't figure out how to use it when you use some es6 Class models. For example, let's…
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