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EasyWebApp/WebCell: Web Components engine based on VDOM, JSX, MobX & TypeScript

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Web Components engine based on VDOM, JSX, MobX & TypeScript

npm install dom-renderer mobx web-cell

Demo & GitHub template

npm install parcel @parcel/config-default @parcel/transformer-typescript-tsc -D

{
    "scripts": {
        "start": "parcel source/index.html --open",
        "build": "parcel build source/index.html --public-url ."
    }
}

{
    "compilerOptions": {
        "target": "ES6",
        "module": "ES2020",
        "moduleResolution": "Node",
        "useDefineForClassFields": true,
        "jsx": "react-jsx",
        "jsxImportSource": "dom-renderer"
    }
}

{
    "extends": "@parcel/config-default",
    "transformers": {
        "*.{ts,tsx}": ["@parcel/transformer-typescript-tsc"]
    }
}

<script src="https://polyfill.web-cell.dev/feature/ECMAScript.js"></script>
<script src="https://polyfill.web-cell.dev/feature/WebComponents.js"></script>
<script src="https://polyfill.web-cell.dev/feature/ElementInternals.js"></script>

<script src="source/MyTag.tsx"></script>

<my-tag></my-tag>

import { DOMRenderer } from 'dom-renderer';
import { FC, PropsWithChildren } from 'web-cell';

const Hello: FC<PropsWithChildren> = ({ children = 'World' }) => (
    <h1>Hello, {children}!</h1>
);

new DOMRenderer().render(<Hello>WebCell</Hello>);

import { DOMRenderer } from 'dom-renderer';
import { component } from 'web-cell';

@component({
    tagName: 'hello-world',
    mode: 'open'
})
class Hello extends HTMLElement {
    render() {
        return (
            <h1>
                Hello, <slot />!
            </h1>
        );
    }
}

new DOMRenderer().render(
    <>
        <Hello>WebCell</Hello>
        {/* or */}
        <hello-world>WebCell</hello-world>
    </>
);

import { DOMRenderer } from 'dom-renderer';
import { observable } from 'mobx';
import { WebCell, component, attribute, observer } from 'web-cell';

interface HelloProps {
    name?: string;
}

interface Hello extends WebCell<HelloProps> {}

@component({ tagName: 'hello-world' })
@observer
class Hello extends HTMLElement implements WebCell<HelloProps> {
    @attribute
    @observable
    accessor name = '';

    render() {
        return <h1>Hello, {this.name}!</h1>;
    }
}

new DOMRenderer().render(<Hello name="WebCell" />);

// or for HTML tag props in TypeScript

declare global {
    namespace JSX {
        interface IntrinsicElements {
            'hello-world': HelloProps;
        }
    }
}
new DOMRenderer().render(<hello-world name="WebCell" />);

import { DOMRenderer } from 'dom-renderer';
import { observable } from 'mobx';
import { FC, observer } from 'web-cell';

class CounterModel {
    @observable
    accessor times = 0;
}

const couterStore = new CounterModel();

const Counter: FC = observer(() => (
    <button onClick={() => (couterStore.times += 1)}>
        Counts: {couterStore.times}
    </button>
));

new DOMRenderer().render(<Counter />);

import { DOMRenderer } from 'dom-renderer';
import { observable } from 'mobx';
import { component, observer } from 'web-cell';

@component({ tagName: 'my-counter' })
@observer
class Counter extends HTMLElement {
    @observable
    accessor times = 0;

    handleClick = () => (this.times += 1);

    render() {
        return <button onClick={this.handleClick}>Counts: {this.times}</button>;
    }
}

new DOMRenderer().render(<Counter />);

import { component } from 'web-cell';
import { stringifyCSS } from 'web-utility';

@component({
    tagName: 'my-button',
    mode: 'open'
})
export class MyButton extends HTMLElement {
    style = stringifyCSS({
        '.btn': {
            color: 'white',
            background: 'lightblue'
        }
    });

    render() {
        return (
            <>
                <style>{this.style}</style>

                <a className="btn">
                    <slot />
                </a>
            </>
        );
    }
}

import { component } from 'web-cell';

@component({
    tagName: 'my-button',
    mode: 'open'
})
export class MyButton extends HTMLElement {
    render() {
        return (
            <>
                <link
                    rel="stylesheet"
                    href="https://unpkg.com/bootstrap@5.3.6/dist/css/bootstrap.min.css"
                />
                <a className="btn">
                    <slot />
                </a>
            </>
        );
    }
}

.btn {
    color: white;
    background: lightblue;
}

import { WebCell, component } from 'web-cell';

import styles from './scoped.css' assert { type: 'css' };

interface MyButton extends WebCell {}

@component({
    tagName: 'my-button',
    mode: 'open'
})
export class MyButton extends HTMLElement implements WebCell {
    connectedCallback() {
        this.root.adoptedStyleSheets = [styles];
    }

    render() {
        return (
            <a className="btn">
                <slot />
            </a>
        );
    }
}

import { component, on } from 'web-cell';

@component({ tagName: 'my-table' })
export class MyTable extends HTMLElement {
    @on('click', ':host td > button')
    handleEdit(event: MouseEvent, { dataset: { id } }: HTMLButtonElement) {
        console.log(`editing row: ${id}`);
    }

    render() {
        return (
            <table>
                <tr>
                    <td>1</td>
                    <td>A</td>
                    <td>
                        <button data-id="1">edit</button>
                    </td>
                </tr>
                <tr>
                    <td>2</td>
                    <td>B</td>
                    <td>
                        <button data-id="2">edit</button>
                    </td>
                </tr>
                <tr>
                    <td>3</td>
                    <td>C</td>
                    <td>
                        <button data-id="3">edit</button>
                    </td>
                </tr>
            </table>
        );
    }
}

import { observable } from 'mobx';
import { component, observer, reaction } from 'web-cell';

@component({ tagName: 'my-counter' })
@observer
export class Counter extends HTMLElement {
    @observable
    accessor times = 0;

    handleClick = () => (this.times += 1);

    @reaction(({ times }) => times)
    echoTimes(newValue: number, oldValue: number) {
        console.log(`newValue: ${newValue}, oldValue: ${oldValue}`);
    }

    render() {
        return <button onClick={this.handleClick}>Counts: {this.times}</button>;
    }
}

import { DOMRenderer } from 'dom-renderer';
import { WebField, component, formField, observer } from 'web-cell';

interface MyField extends WebField {}

@component({
    tagName: 'my-field',
    mode: 'open'
})
@formField
@observer
class MyField extends HTMLElement implements WebField {
    render() {
        const { name } = this;

        return (
            <input
                name={name}
                onChange={({ currentTarget: { value } }) =>
                    (this.value = value)
                }
            />
        );
    }
}

new DOMRenderer().render(
    <form method="POST" action="/api/data">
        <MyField name="test" />

        <button>submit</button>
    </form>
);

import { FC } from 'web-cell';

const AsyncTag: FC = () => <div>Async</div>;

export default AsyncTag;

import { DOMRenderer } from 'dom-renderer';
import { lazy } from 'web-cell';

const AsyncTag = lazy(() => import('./AsyncTag'));

new DOMRenderer().render(<AsyncTag />);

import { DOMRenderer } from 'dom-renderer';

new DOMRenderer().render(
    <a>
        <b>Async rendering</b>
    </a>,
    document.body,
    'async'
);

import { component } from 'web-cell';

@component({
    tagName: 'async-renderer',
    renderMode: 'async'
})
export class AsyncRenderer extends HTMLElement {
    render() {
        return (
            <a>
                <b>Async rendering</b>
            </a>
        );
    }
}

import { DOMRenderer } from 'dom-renderer';
import { AnimateCSS } from 'web-cell';

new DOMRenderer().render(
    <AnimateCSS
        type="fadeIn"
        component={props => <h1 {...props}>Fade In</h1>}
    />
);

import 'web-cell/polyfill';

https://github.com/EasyWebApp/DOM-Renderer?tab=readme-ov-file#nodejs--bun

• Web components
• Custom elements
• Shadow DOM
• Element Internals
• CSS variables
• View transitions
• ECMAScript 6+
• TypeScript 5+

1. connectedCallback
2. disconnectedCallback
3. attributeChangedCallback
4. adoptedCallback
5. updatedCallback
6. mountedCallback
7. formAssociatedCallback
8. formDisabledCallback
9. formResetCallback
10. formStateRestoreCallback

1. Basic
2. DashBoard
3. Mobile
4. Static site

We recommend these libraries to use with WebCell:

• State management: MobX (also powered by TypeScript & Decorator)

• Router: Cell Router

• UI components

  • BootCell (based on BootStrap v5)
  • MDUI (based on Material Design v3)
  • GitHub Web Widget

• HTTP request: KoAJAX (based on Koa-like middlewares)

• Utility: Web utility methods & types

• Event stream: Iterable Observer (Observable proposal)

• MarkDown integration: Parcel MDX transformer (MDX Compiler plugin)

• Server-side Render
• Async Component loading

1. Development contribution

RetroSearch is an open source project built by @garambo | Open a GitHub Issue

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