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Getting Started


React-RxJS is published in npm as @react-rxjs/core

npm i rxjs @react-rxjs/core @react-rxjs/utils

or using yarn

yarn add rxjs @react-rxjs/core @react-rxjs/utils

Create a hook from an observable

@react-rxjs/core exports a function called bind which is used to connect a stream to a hook.

import { bind } from "@react-rxjs/core"
import { createSignal } from "@react-rxjs/utils"

// A signal is an entry point to react-rxjs. It's equivalent to using a subject
const [textChange$, setText] = createSignal<string>();

const [useText, text$] = bind(textChange$, "")

function TextInput() {
const text = useText()

return (
placeholder="Type something..."
onChange={(e) => setText(}
<br />
Echo: {text}

bind returns a tuple that contains the hook, plus the underlying shared observable so it can be used by other streams:

import { map } from "rxjs/operators"
import { bind, Subscribe } from "@react-rxjs/core"

// Previously...
// const [useText, text$] = bind(...);

const [useCharCount, charCount$] = bind(
map((text) => text.length)

function CharacterCount() {
const count = useCharCount()

return <>Character Count: {count}</>

Something to note is that a subscription on the underlying observable must be present before the hook is executed. We can use Subscribe to help us with it:

function CharacterCounter() {
return (
<TextInput />
<CharacterCount />

The interactive result:

Next steps

We strongly recommend reading through core concepts to understand the mindset of this library.