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@inkline/paper

v1.5.0

Published

Paper is a unified interface for defining components for Vue and React using a single code base.

Downloads

12

Readme

Running locally

  1. First, install dependencies using npm install.
  2. From the root directory, run npm run test in the command line.

Setup

  1. Set an alias in your build system to resolve @inkline/paper to either @inkline/paper/vue or @inkline/paper/react.
  • @inkline/paper => @inkline/paper/vue
  • @inkline/paper => @inkline/paper/react
  1. Import the common component definition interface from @inkline/paper and decide whether you're creating a library for vue or react at build time.

  2. Configure tsconfig.json to use the custom h and Fragment JSX Factory functions.

{
    "compilerOptions": {
        "jsx": "preserve",
        "jsxFactory": "h",
        "jsxFragmentFactory": "Fragment"
    }
}

Usage

Create element

h(type: string, props: Record<string, any>, children: (VNode | string)[]): VNode

The hoist function h() is used to create elements.

import { h } from '@inkline/paper';

const type = 'button';
const props = { id: 'button' };
const children = ['Hello world'];

const node = h(type, props, children);

It also serves as a JSX Factory.

import { h } from '@inkline/paper';

const node = <div id="myid">Hello world!</div>

Define component

defineComponent<Props, State>(definition: ComponentDefinition<Props, State>)

The defineComponent() function is used to set up framework-specific internals and get type annotations.

import { defineComponent, h } from '@inkline/paper';

const Component = defineComponent({
    render () {
        return h('div');
    }
});
import { defineComponent, h } from '@inkline/paper';

const Component = defineComponent({
    render () {
        return <div />;
    }
});

Vue.js

<component />

React.js

<Component />

Render function

defineComponent({ render(state: Props & State, ctx: RenderContext): VNode })

The render() function is mandatory and is used to return the component markup using hoisting.

import { defineComponent, h } from '@inkline/paper';

const Component = defineComponent({
    render () {
        return h('button', {}, 'Hello world');
    }
});
import { defineComponent, h } from '@inkline/paper';

const Component = defineComponent({
    render () {
        return <button>Hello world</button>;
    }
});

Vue.js

<component />

React.js

<Component />

Setup function

defineComponent({ setup(props: Props, ctx: SetupContext) })

The setup() function is used to prepare functions.

import { defineComponent, h } from '@inkline/paper';

const Component = defineComponent<{}, { text: string }>({
    setup () {
        return {
            text: "Hello world"
        };
    },
    render (state) {
        return h('button', {}, [
            state.text
        ]);
    }
});
import { defineComponent, h } from '@inkline/paper';

const Component = defineComponent<{}, { text: string }>({
    setup () {
        return {
            text: "Hello world"
        };
    },
    render (state) {
        return <button>{state.text}</button>;
    }
});

Vue.js

<component />

React.js

<Component />

Reference variables

ref<Type>(defaultValue: Type)

The ref variable works similar to the Vue.js ref. To access or set the value of a reference variable, access or manipulate its value field directly.

import { defineComponent, ref, h, Ref } from '@inkline/paper';

const Component = defineComponent<{}, { text: Ref<string>, onClick: () => void }>({
    setup () {
        const text = ref('Hello world');
        
        const onClick = () => {
            text.value = 'Bye world';
        }
        
        return {
            text,
            onClick
        };
    },
    render (state) {
        return h('button', { onClick: state.onClick }, [
            state.text.value
        ]);
    }
});

Vue.js

<component />

React.js

<Component />

Computed variables

computed<Type>(() => Type)
import { defineComponent, ref, h, Ref } from '@inkline/paper';

const Component = defineComponent<{ value: number; }, { double: Ref<number> }>({
    setup (props) {
        const double = computed(() => props.value * 2);
        
        return {
            double
        };
    },
    render (state) {
        return h('button', {}, [
            state.double.value
        ]);
    }
});

Vue.js

<component />

React.js

<Component />

Provide and Inject

provide<Type>(identifier: string, value: Type) 
inject<Type>(identifier: string, defaultValue?: Type): Type
import { defineComponent, ref, h, Ref } from '@inkline/paper';

const identifier = Symbol('identifier');

const Provider = defineComponent<{}, {}>({
    setup (props, ctx) {
        ctx.provide(identifier, 'value');
        
        return {};
    },
    render (state, ctx) {
        return h('div', {}, [
            ctx.slot()
        ]);
    }
});

const Consumer = defineComponent<{}, { value?: string; }>({
    setup (props, ctx) {
        const value = inject(identifier, 'defaultValue');
        
        return { value };
    },
    render (state, ctx) {
        return h('div', {}, [
            `${state.value}`
        ]);
    }
});

Vue.js

<provider>
    <consumer />
</provider>

React.js

<Provider>
    <Consumer />
</Provider>

Props

defineComponent({ props: ComponentProps<Props> })

Define the props using the props field, using the same format used in Vue.js.

The setup() function receives the defined prop values with default as fallback.

import { defineComponent, h } from '@inkline/paper';

const Component = defineComponent<{ text: string }, {}>({
    props: {
        text: {
            type: String,
            default: () => 'Hello world'
        }
    },
    render (state) {
        return h('button', {}, [
            state.text
        ]);
    }
});

Vue.js

<component text="Button" />

React.js

<Component text={"Button"} />

Slots

defineComponent({ slots: string[] })` and `renderContext.slot(slotName)

The slots array allows you to define multiple slot names for the component. Out of the box, the default slot is pre-defined.

The slot() function is available in the render function execution context.

import { defineComponent, h } from '@inkline/paper';

const Component = defineComponent({
    slots: ['header', 'footer'],
    render (state, ctx) {
        return h('div', { class: 'card' }, [
            ctx.slot('header'),
            ctx.slot(), // Default slot
            ctx.slot('footer'),
        ]);
    }
});

Vue.js

<component>
    <template #header>Header</template>
    Body
    <template #footer>Header</template>
</component>

React.js

<Component>
    <Component.Header>Header</Component.Header>
    Body
    <Component.Footer>Header</Component.Footer>
</Component>

Events

defineComponent({ emits: string[] })` and `setupContext.emit(eventName, ...args)

The emits array allows you to define event emitters.

  • for Vue.js, this uses the native emit() function
  • for React.js, this creates an on[EventName] callback
import { defineComponent, h } from '@inkline/paper';

const Component = defineComponent<{}, { emitChange: () => void }>({
    emits: ['change'],
    setup (props, ctx) {
        const emitChange = () => {
            ctx.emit('change');
        } 
        
        return { emitChange };
    },
    render (state, ctx) {
        return h('button', { onClick: state.emitChange }, [ctx.slot()]);
    }
});

Vue.js

<component @change="doSomething" />

React.js

<Component onChange={() => doSomething()} />

Creator

Alex Grozav

If you use Inkline in your daily work and feel that it has made your life easier, please consider sponsoring me on Github Sponsors. 💖

Copyright and license

Homepage and documentation copyright 2017-2022 Inkline Authors. Docs released under ISC License.