egoistdeveloper / angular-reactflow-examples

AngularFlow

This project demonstrates how to use React and Reactflow with Angular. These examples are compatible with Angular 14+ and React 17+. The examples are based on the Reactflow examples.

React Component Directive

The react-component directive allows you to use React components in Angular templates. Logic is handled in the React component, while the Angular template is used to pass data to the React component.

Warning: This directive is a standalone directive. If you want to use it in your project, you need to modify the code to fit your needs.

Import Reactflow styles

@import '@reactflow/core/dist/style.css';
@import '@reactflow/controls/dist/style.css';
@import '@reactflow/minimap/dist/style.css';

React Component Wrapper

Just pass react component and props to the react-component directive. The directive will create a wrapper component that will render the react component.

<div id="root">
  <div
    [reactComponent]="ReactFlowSubFlows"
    (onEvent)="onEvent($event)"
    [props]="props"
    class="react-flow-container"
  ></div>
</div>

Example Implementation for Older Angular Versions

An example implementation for older Angular versions based react-component.directive.ts file.

import { ApplicationRef, Directive, ElementRef, inject, Injector, Input, OnChanges, OnInit, OnDestroy } from '@angular/core';
import { ComponentProps, createElement, ElementType, React } from 'react';
import { createRoot } from 'react-dom/client';

@Directive({
	// eslint-disable-next-line @angular-eslint/directive-selector
	selector: '[reactComponent]',
})
export class ReactComponentDirective<Comp extends ElementType> implements OnChanges, OnDestroy {
	@Input() public reactComponent: Comp;
	@Input() public props: ComponentProps<Comp>;
	@Input() public children: any;

	private root: any;

	constructor(private appRef: ApplicationRef, private elementRef: ElementRef) {
		this.root = createRoot(this.elementRef.nativeElement);
	}

	public ngOnChanges(): void {
		this.root.render(
			createElement(
				this.reactComponent,
				this.props,
				this.children?.map((child: any) =>
					createElement(child as React.FC<any>, {
						key: child.name,
						...child.props,
					})
				)
			)
		);
	}

	public ngOnDestroy(): void {
		this.root.unmount();
	}
}