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ng-to-react

ng-to-react allows you to seamlessy use ⚛️ React and 🅰️ Angular components together.

👉 This package will be the a perfect match to migrate from Angular to React.

⭐ this repo if you like this package, it helps to motivate me :)

🧑‍💻 Sample

Jump to the sample repository for a a working sample (here on Stackblitz)

📐 Setup

1) Prepare your Angular project

A) Install ng-to-react:

npm i ng-to-react

B) Install React:

npm i react react-dom -S
npm i @types/react @types/react-dom -D

C) Configure typescript so it picks up TSX:

      "jsx": "react-jsx",

(in your tsconfig.json, under the "compilerOptions" section)

D) Add the node_modules/ng-to-react/src/* as included in your tsconfig.json compilation:

  "include": [
    "src",  // you should already have this one if you had an "include" section :)
    "node_modules/ng-to-react/src/*" // 👈  add this
    // [...]
  ],

(NB: If someone has a better solution that this, please tell me... but pre-compilling & publish the source seems to fail the angular build when installing this lib)

2) Declare your bridge

At the root of you project, declare a file bridge.ts :

import { ReactBridge } from "ng-to-react";

// declare the bridge
export const reactBridge = new ReactBridge();

you can OPTINALLY declare there the directives that will be available in your react componetns globaly, such as, for instance:

export const reactBridge = new ReactBridge();
    .addDirective('focus', (focus: boolean, _, elt) => setTimeout(() => focus && elt.focus()))

3) Enjoy

You can now use React & Angular together 🥳

Use 🅰️ Angular components in ⚛️ React

Suppose you have an Angular component MyAngularComponent you would like to use in React.

In your component declaration file, just put:

import { reactBridge } from "./bridge";

// [...] MyAngularComponent declaration

// this will be usable in React:
export const MyAngular = reactBridge.toReact(MyAngularComponent, {
  // declares that this component accepts children
  children: true,
});

Then, you'll be able to use this in react:

import {MyAngular} from './my-angular.component';

// use the component, enjoy the types !
const Other = () => <MyAngular input={'whatever'}>;

Use ⚛️ React components in 🅰️ Angular

Suppose you have a React component MyReactComponent you would like to use in Angular.

In your component declaration file, just put:

import { reactBridge } from "./bridge";

function MyReactComponent(props: {
  data: string;
  dataChange: (evt: string) => void;
}) {
    // [...]
}

@Directive({ selector: "my-react-component" })
export class MyReactComponent_Angular extends reactBridge.toAngular(
  MyReactComponent
) {

  // a bit of extra work: You will have to map the properties yourself (type compatibility will be ensured by Tyepscript, though)
  @Input()
  data!: string;
  @Output()
  dataChange = new EventEmitter();
}

Then, declare MyReactComponent_Angular in your ng-module, and you'll be able to use your component in Angular :

<my-react-component [(data)]="whatever"></my-react-component>

Access 🅰️ Angular services from ⚛️ React

Easy

function MyReactComp() {
  const service = useService(SomeAngularService); // simple, isnt it ?
}

🅰️ Angular outputs handling

Angular outputs are bound to callback props in react.

Meaning that:

@Ouptut() valueChange: EventEmitter<string>;

Will be bound to a react prop:

valueChange: (evt: string) => any;

@Input / @Outputs 🅰️ vs ⚛️ React state hooks

When importing an Angular component in React, if your angular component has a matching @Input() and @Output() property pairs, say a value input, and valueChange output, you will notice that ng-to-react will add a value$ property (name of the input, with a $ suffix) to the corresponding react type.

This property will be typed as something which is compatible with the useState() react hook. Meaning that, for if you have:

@Input() value: string;
@Ouptut() valueChange: EventEmitter<string>;

Then you will be able to use your component in react like that:

const value = useState("");

return <MyComonent value$={value} />;

... and the value state will be two-way bound with your react component !

(But of course, you can still use the value: string and valueChange: (e: string) => any props that ng-to-react will have generated for you, if you prefer so)

💥 TODO / Limits

Currently not supported (todo):

• Integration with the Angular router
• Inject children in React that are declared in Angular.