83 lines
2.2 KiB
Plaintext
83 lines
2.2 KiB
Plaintext
import { createElement, render } from 'preact';
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/**
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* @param {import('../../src/index').RenderableProps<{ context: any }>} props
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*/
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function ContextProvider(props) {
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this.getChildContext = () => props.context;
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return props.children;
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}
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/**
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* Portal component
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* @this {import('./internal').Component}
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* @param {object | null | undefined} props
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*
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* TODO: use createRoot() instead of fake root
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*/
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function Portal(props) {
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const _this = this;
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let container = props._container;
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_this.componentWillUnmount = function() {
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render(null, _this._temp);
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_this._temp = null;
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_this._container = null;
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};
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// When we change container we should clear our old container and
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// indicate a new mount.
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if (_this._container && _this._container !== container) {
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_this.componentWillUnmount();
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}
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// When props.vnode is undefined/false/null we are dealing with some kind of
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// conditional vnode. This should not trigger a render.
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if (props._vnode) {
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if (!_this._temp) {
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_this._container = container;
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// Create a fake DOM parent node that manages a subset of `container`'s children:
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_this._temp = {
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nodeType: 1,
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parentNode: container,
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childNodes: [],
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appendChild(child) {
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this.childNodes.push(child);
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_this._container.appendChild(child);
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},
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insertBefore(child, before) {
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this.childNodes.push(child);
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_this._container.appendChild(child);
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},
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removeChild(child) {
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this.childNodes.splice(this.childNodes.indexOf(child) >>> 1, 1);
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_this._container.removeChild(child);
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}
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};
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}
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// Render our wrapping element into temp.
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render(
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createElement(ContextProvider, { context: _this.context }, props._vnode),
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_this._temp
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);
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}
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// When we come from a conditional render, on a mounted
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// portal we should clear the DOM.
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else if (_this._temp) {
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_this.componentWillUnmount();
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}
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}
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/**
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* Create a `Portal` to continue rendering the vnode tree at a different DOM node
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* @param {import('./internal').VNode} vnode The vnode to render
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* @param {import('./internal').PreactElement} container The DOM node to continue rendering in to.
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*/
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export function createPortal(vnode, container) {
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const el = createElement(Portal, { _vnode: vnode, _container: container });
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el.containerInfo = container;
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return el;
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}
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