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File size: 2,145 Bytes
e8a57cb | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 | import { createElement, render } from 'preact';
/**
* @param {import('../../src/index').RenderableProps<{ context: any }>} props
*/
function ContextProvider(props) {
this.getChildContext = () => props.context;
return props.children;
}
/**
* Portal component
* @this {import('./internal').Component}
* @param {object | null | undefined} props
*
* TODO: use createRoot() instead of fake root
*/
function Portal(props) {
const _this = this;
let container = props._container;
_this.componentWillUnmount = function () {
render(null, _this._temp);
_this._temp = null;
_this._container = null;
};
// When we change container we should clear our old container and
// indicate a new mount.
if (_this._container && _this._container !== container) {
_this.componentWillUnmount();
}
if (!_this._temp) {
// Ensure the element has a mask for useId invocations
let root = _this._vnode;
while (root !== null && !root._mask && root._parent !== null) {
root = root._parent;
}
_this._container = container;
// Create a fake DOM parent node that manages a subset of `container`'s children:
_this._temp = {
nodeType: 1,
parentNode: container,
childNodes: [],
_children: { _mask: root._mask },
contains: () => true,
namespaceURI: container.namespaceURI,
insertBefore(child, before) {
this.childNodes.push(child);
_this._container.insertBefore(child, before);
},
removeChild(child) {
this.childNodes.splice(this.childNodes.indexOf(child) >>> 1, 1);
_this._container.removeChild(child);
}
};
}
// Render our wrapping element into temp.
render(
createElement(ContextProvider, { context: _this.context }, props._vnode),
_this._temp
);
}
/**
* Create a `Portal` to continue rendering the vnode tree at a different DOM node
* @param {import('./internal').VNode} vnode The vnode to render
* @param {import('./internal').PreactElement} container The DOM node to continue rendering in to.
*/
export function createPortal(vnode, container) {
const el = createElement(Portal, { _vnode: vnode, _container: container });
el.containerInfo = container;
return el;
}
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