Ref-Lit JS

<!-- html -->
<my-component></my-component>

// javascript
<script type="module">
    import 'https://unpkg.com/@palerock/ref-lit/build/ref-lit.mini.js';

    const {defineComponent, html} = window.$ref_lit;

    defineComponent('custom-input',
        {
            value: '',
            type: 'text',
            placeholder: 'please input...'
        },
        ({props, component}) => {

            function onInputChanged(e) {
                component.dispatchEvent(new CustomEvent('cvalue', {
                    detail: {value: e.target.value}
                }));
            }

            return () => html`
                <input value=${props.value} type=${props.type} placeholder=${props.placeholder} @keyup=${onInputChanged} >
            `
        }
    );

    defineComponent('my-component', {}, ({ref}) => {

        function onValueChanged(e) {
            ref.value = e.detail.value;
        }

        return () => html`
            <div>
                <p>${ref.value}</p>
                <custom-input value=${ref.value} @cvalue=${onValueChanged}></custom-input>
            </div>
        `
    });
</script>