FRE-600: Fix code review blockers

- Consolidated duplicate UndoManagers to single instance
- Fixed connection promise to only resolve on 'connected' status
- Fixed WebSocketProvider import (WebsocketProvider)
- Added proper doc.destroy() cleanup
- Renamed isPresenceInitialized property to avoid conflict

Co-Authored-By: Paperclip <noreply@paperclip.ing>

node_modules/preact/src/diff/catch-error.js

@@ -0,0 +1,44 @@
+/**
+ * Find the closest error boundary to a thrown error and call it
+ * @param {object} error The thrown value
+ * @param {VNode} vnode The vnode that threw the error that was caught (except
+ * for unmounting when this parameter is the highest parent that was being
+ * unmounted)
+ * @param {VNode} [oldVNode]
+ * @param {ErrorInfo} [errorInfo]
+ */
+export function _catchError(error, vnode, oldVNode, errorInfo) {
+	/** @type {Component} */
+	let component,
+		/** @type {ComponentType} */
+		ctor,
+		/** @type {boolean} */
+		handled;
+
+	for (; (vnode = vnode._parent); ) {
+		if ((component = vnode._component) && !component._processingException) {
+			try {
+				ctor = component.constructor;
+
+				if (ctor && ctor.getDerivedStateFromError != null) {
+					component.setState(ctor.getDerivedStateFromError(error));
+					handled = component._dirty;
+				}
+
+				if (component.componentDidCatch != null) {
+					component.componentDidCatch(error, errorInfo || {});
+					handled = component._dirty;
+				}
+
+				// This is an error boundary. Mark it as having bailed out, and whether it was mid-hydration.
+				if (handled) {
+					return (component._pendingError = component);
+				}
+			} catch (e) {
+				error = e;
+			}
+		}
+	}
+
+	throw error;
+}

node_modules/preact/src/diff/children.js

@@ -0,0 +1,443 @@
+import { diff, unmount, applyRef } from './index';
+import { createVNode, Fragment } from '../create-element';
+import { EMPTY_OBJ, EMPTY_ARR, INSERT_VNODE, MATCHED } from '../constants';
+import { isArray } from '../util';
+import { getDomSibling } from '../component';
+
+/**
+ * Diff the children of a virtual node
+ * @param {PreactElement} parentDom The DOM element whose children are being
+ * diffed
+ * @param {ComponentChildren[]} renderResult
+ * @param {VNode} newParentVNode The new virtual node whose children should be
+ * diff'ed against oldParentVNode
+ * @param {VNode} oldParentVNode The old virtual node whose children should be
+ * diff'ed against newParentVNode
+ * @param {object} globalContext The current context object - modified by
+ * getChildContext
+ * @param {string} namespace Current namespace of the DOM node (HTML, SVG, or MathML)
+ * @param {Array<PreactElement>} excessDomChildren
+ * @param {Array<Component>} commitQueue List of components which have callbacks
+ * to invoke in commitRoot
+ * @param {PreactElement} oldDom The current attached DOM element any new dom
+ * elements should be placed around. Likely `null` on first render (except when
+ * hydrating). Can be a sibling DOM element when diffing Fragments that have
+ * siblings. In most cases, it starts out as `oldChildren[0]._dom`.
+ * @param {boolean} isHydrating Whether or not we are in hydration
+ * @param {any[]} refQueue an array of elements needed to invoke refs
+ */
+export function diffChildren(
+	parentDom,
+	renderResult,
+	newParentVNode,
+	oldParentVNode,
+	globalContext,
+	namespace,
+	excessDomChildren,
+	commitQueue,
+	oldDom,
+	isHydrating,
+	refQueue
+) {
+	let i,
+		/** @type {VNode} */
+		oldVNode,
+		/** @type {VNode} */
+		childVNode,
+		/** @type {PreactElement} */
+		newDom,
+		/** @type {PreactElement} */
+		firstChildDom;
+
+	// This is a compression of oldParentVNode!=null && oldParentVNode != EMPTY_OBJ && oldParentVNode._children || EMPTY_ARR
+	// as EMPTY_OBJ._children should be `undefined`.
+	/** @type {VNode[]} */
+	let oldChildren = (oldParentVNode && oldParentVNode._children) || EMPTY_ARR;
+
+	let newChildrenLength = renderResult.length;
+
+	newParentVNode._nextDom = oldDom;
+	constructNewChildrenArray(newParentVNode, renderResult, oldChildren);
+	oldDom = newParentVNode._nextDom;
+
+	for (i = 0; i < newChildrenLength; i++) {
+		childVNode = newParentVNode._children[i];
+		if (childVNode == null) continue;
+
+		// At this point, constructNewChildrenArray has assigned _index to be the
+		// matchingIndex for this VNode's oldVNode (or -1 if there is no oldVNode).
+		if (childVNode._index === -1) {
+			oldVNode = EMPTY_OBJ;
+		} else {
+			oldVNode = oldChildren[childVNode._index] || EMPTY_OBJ;
+		}
+
+		// Update childVNode._index to its final index
+		childVNode._index = i;
+
+		// Morph the old element into the new one, but don't append it to the dom yet
+		diff(
+			parentDom,
+			childVNode,
+			oldVNode,
+			globalContext,
+			namespace,
+			excessDomChildren,
+			commitQueue,
+			oldDom,
+			isHydrating,
+			refQueue
+		);
+
+		// Adjust DOM nodes
+		newDom = childVNode._dom;
+		if (childVNode.ref && oldVNode.ref != childVNode.ref) {
+			if (oldVNode.ref) {
+				applyRef(oldVNode.ref, null, childVNode);
+			}
+			refQueue.push(
+				childVNode.ref,
+				childVNode._component || newDom,
+				childVNode
+			);
+		}
+
+		if (firstChildDom == null && newDom != null) {
+			firstChildDom = newDom;
+		}
+
+		if (
+			childVNode._flags & INSERT_VNODE ||
+			oldVNode._children === childVNode._children
+		) {
+			oldDom = insert(childVNode, oldDom, parentDom);
+		} else if (
+			typeof childVNode.type == 'function' &&
+			childVNode._nextDom !== undefined
+		) {
+			// Since Fragments or components that return Fragment like VNodes can
+			// contain multiple DOM nodes as the same level, continue the diff from
+			// the sibling of last DOM child of this child VNode
+			oldDom = childVNode._nextDom;
+		} else if (newDom) {
+			oldDom = newDom.nextSibling;
+		}
+
+		// Eagerly cleanup _nextDom. We don't need to persist the value because it
+		// is only used by `diffChildren` to determine where to resume the diff
+		// after diffing Components and Fragments. Once we store it the nextDOM
+		// local var, we can clean up the property. Also prevents us hanging on to
+		// DOM nodes that may have been unmounted.
+		childVNode._nextDom = undefined;
+
+		// Unset diffing flags
+		childVNode._flags &= ~(INSERT_VNODE | MATCHED);
+	}
+
+	// TODO: With new child diffing algo, consider alt ways to diff Fragments.
+	// Such as dropping oldDom and moving fragments in place
+	//
+	// Because the newParentVNode is Fragment-like, we need to set it's
+	// _nextDom property to the nextSibling of its last child DOM node.
+	//
+	// `oldDom` contains the correct value here because if the last child
+	// is a Fragment-like, then oldDom has already been set to that child's _nextDom.
+	// If the last child is a DOM VNode, then oldDom will be set to that DOM
+	// node's nextSibling.
+	newParentVNode._nextDom = oldDom;
+	newParentVNode._dom = firstChildDom;
+}
+
+/**
+ * @param {VNode} newParentVNode
+ * @param {ComponentChildren[]} renderResult
+ * @param {VNode[]} oldChildren
+ */
+function constructNewChildrenArray(newParentVNode, renderResult, oldChildren) {
+	/** @type {number} */
+	let i;
+	/** @type {VNode} */
+	let childVNode;
+	/** @type {VNode} */
+	let oldVNode;
+
+	const newChildrenLength = renderResult.length;
+	let oldChildrenLength = oldChildren.length,
+		remainingOldChildren = oldChildrenLength;
+
+	let skew = 0;
+
+	newParentVNode._children = [];
+	for (i = 0; i < newChildrenLength; i++) {
+		// @ts-expect-error We are reusing the childVNode variable to hold both the
+		// pre and post normalized childVNode
+		childVNode = renderResult[i];
+
+		if (
+			childVNode == null ||
+			typeof childVNode == 'boolean' ||
+			typeof childVNode == 'function'
+		) {
+			childVNode = newParentVNode._children[i] = null;
+			continue;
+		}
+		// If this newVNode is being reused (e.g. <div>{reuse}{reuse}</div>) in the same diff,
+		// or we are rendering a component (e.g. setState) copy the oldVNodes so it can have
+		// it's own DOM & etc. pointers
+		else if (
+			typeof childVNode == 'string' ||
+			typeof childVNode == 'number' ||
+			// eslint-disable-next-line valid-typeof
+			typeof childVNode == 'bigint' ||
+			childVNode.constructor == String
+		) {
+			childVNode = newParentVNode._children[i] = createVNode(
+				null,
+				childVNode,
+				null,
+				null,
+				null
+			);
+		} else if (isArray(childVNode)) {
+			childVNode = newParentVNode._children[i] = createVNode(
+				Fragment,
+				{ children: childVNode },
+				null,
+				null,
+				null
+			);
+		} else if (childVNode.constructor === undefined && childVNode._depth > 0) {
+			// VNode is already in use, clone it. This can happen in the following
+			// scenario:
+			//   const reuse = <div />
+			//   <div>{reuse}<span />{reuse}</div>
+			childVNode = newParentVNode._children[i] = createVNode(
+				childVNode.type,
+				childVNode.props,
+				childVNode.key,
+				childVNode.ref ? childVNode.ref : null,
+				childVNode._original
+			);
+		} else {
+			childVNode = newParentVNode._children[i] = childVNode;
+		}
+
+		const skewedIndex = i + skew;
+		childVNode._parent = newParentVNode;
+		childVNode._depth = newParentVNode._depth + 1;
+
+		// Temporarily store the matchingIndex on the _index property so we can pull
+		// out the oldVNode in diffChildren. We'll override this to the VNode's
+		// final index after using this property to get the oldVNode
+		const matchingIndex = (childVNode._index = findMatchingIndex(
+			childVNode,
+			oldChildren,
+			skewedIndex,
+			remainingOldChildren
+		));
+
+		oldVNode = null;
+		if (matchingIndex !== -1) {
+			oldVNode = oldChildren[matchingIndex];
+			remainingOldChildren--;
+			if (oldVNode) {
+				oldVNode._flags |= MATCHED;
+			}
+		}
+
+		// Here, we define isMounting for the purposes of the skew diffing
+		// algorithm. Nodes that are unsuspending are considered mounting and we detect
+		// this by checking if oldVNode._original === null
+		const isMounting = oldVNode == null || oldVNode._original === null;
+
+		if (isMounting) {
+			if (matchingIndex == -1) {
+				skew--;
+			}
+
+			// If we are mounting a DOM VNode, mark it for insertion
+			if (typeof childVNode.type != 'function') {
+				childVNode._flags |= INSERT_VNODE;
+			}
+		} else if (matchingIndex !== skewedIndex) {
+			// When we move elements around i.e. [0, 1, 2] --> [1, 0, 2]
+			// --> we diff 1, we find it at position 1 while our skewed index is 0 and our skew is 0
+			//     we set the skew to 1 as we found an offset.
+			// --> we diff 0, we find it at position 0 while our skewed index is at 2 and our skew is 1
+			//     this makes us increase the skew again.
+			// --> we diff 2, we find it at position 2 while our skewed index is at 4 and our skew is 2
+			//
+			// this becomes an optimization question where currently we see a 1 element offset as an insertion
+			// or deletion i.e. we optimize for [0, 1, 2] --> [9, 0, 1, 2]
+			// while a more than 1 offset we see as a swap.
+			// We could probably build heuristics for having an optimized course of action here as well, but
+			// might go at the cost of some bytes.
+			//
+			// If we wanted to optimize for i.e. only swaps we'd just do the last two code-branches and have
+			// only the first item be a re-scouting and all the others fall in their skewed counter-part.
+			// We could also further optimize for swaps
+			if (matchingIndex == skewedIndex - 1) {
+				skew--;
+			} else if (matchingIndex == skewedIndex + 1) {
+				skew++;
+			} else {
+				if (matchingIndex > skewedIndex) {
+					skew--;
+				} else {
+					skew++;
+				}
+
+				// Move this VNode's DOM if the original index (matchingIndex) doesn't
+				// match the new skew index (i + new skew)
+				// In the former two branches we know that it matches after skewing
+				childVNode._flags |= INSERT_VNODE;
+			}
+		}
+	}
+
+	// Remove remaining oldChildren if there are any. Loop forwards so that as we
+	// unmount DOM from the beginning of the oldChildren, we can adjust oldDom to
+	// point to the next child, which needs to be the first DOM node that won't be
+	// unmounted.
+	if (remainingOldChildren) {
+		for (i = 0; i < oldChildrenLength; i++) {
+			oldVNode = oldChildren[i];
+			if (oldVNode != null && (oldVNode._flags & MATCHED) === 0) {
+				if (oldVNode._dom == newParentVNode._nextDom) {
+					newParentVNode._nextDom = getDomSibling(oldVNode);
+				}
+
+				unmount(oldVNode, oldVNode);
+			}
+		}
+	}
+}
+
+/**
+ * @param {VNode} parentVNode
+ * @param {PreactElement} oldDom
+ * @param {PreactElement} parentDom
+ * @returns {PreactElement}
+ */
+function insert(parentVNode, oldDom, parentDom) {
+	// Note: VNodes in nested suspended trees may be missing _children.
+
+	if (typeof parentVNode.type == 'function') {
+		let children = parentVNode._children;
+		for (let i = 0; children && i < children.length; i++) {
+			if (children[i]) {
+				// If we enter this code path on sCU bailout, where we copy
+				// oldVNode._children to newVNode._children, we need to update the old
+				// children's _parent pointer to point to the newVNode (parentVNode
+				// here).
+				children[i]._parent = parentVNode;
+				oldDom = insert(children[i], oldDom, parentDom);
+			}
+		}
+
+		return oldDom;
+	} else if (parentVNode._dom != oldDom) {
+		if (oldDom && parentVNode.type && !parentDom.contains(oldDom)) {
+			oldDom = getDomSibling(parentVNode);
+		}
+		parentDom.insertBefore(parentVNode._dom, oldDom || null);
+		oldDom = parentVNode._dom;
+	}
+
+	do {
+		oldDom = oldDom && oldDom.nextSibling;
+	} while (oldDom != null && oldDom.nodeType === 8);
+
+	return oldDom;
+}
+
+/**
+ * Flatten and loop through the children of a virtual node
+ * @param {ComponentChildren} children The unflattened children of a virtual
+ * node
+ * @returns {VNode[]}
+ */
+export function toChildArray(children, out) {
+	out = out || [];
+	if (children == null || typeof children == 'boolean') {
+	} else if (isArray(children)) {
+		children.some(child => {
+			toChildArray(child, out);
+		});
+	} else {
+		out.push(children);
+	}
+	return out;
+}
+
+/**
+ * @param {VNode} childVNode
+ * @param {VNode[]} oldChildren
+ * @param {number} skewedIndex
+ * @param {number} remainingOldChildren
+ * @returns {number}
+ */
+function findMatchingIndex(
+	childVNode,
+	oldChildren,
+	skewedIndex,
+	remainingOldChildren
+) {
+	const key = childVNode.key;
+	const type = childVNode.type;
+	let x = skewedIndex - 1;
+	let y = skewedIndex + 1;
+	let oldVNode = oldChildren[skewedIndex];
+
+	// We only need to perform a search if there are more children
+	// (remainingOldChildren) to search. However, if the oldVNode we just looked
+	// at skewedIndex was not already used in this diff, then there must be at
+	// least 1 other (so greater than 1) remainingOldChildren to attempt to match
+	// against. So the following condition checks that ensuring
+	// remainingOldChildren > 1 if the oldVNode is not already used/matched. Else
+	// if the oldVNode was null or matched, then there could needs to be at least
+	// 1 (aka `remainingOldChildren > 0`) children to find and compare against.
+	let shouldSearch =
+		remainingOldChildren >
+		(oldVNode != null && (oldVNode._flags & MATCHED) === 0 ? 1 : 0);
+
+	if (
+		oldVNode === null ||
+		(oldVNode &&
+			key == oldVNode.key &&
+			type === oldVNode.type &&
+			(oldVNode._flags & MATCHED) === 0)
+	) {
+		return skewedIndex;
+	} else if (shouldSearch) {
+		while (x >= 0 || y < oldChildren.length) {
+			if (x >= 0) {
+				oldVNode = oldChildren[x];
+				if (
+					oldVNode &&
+					(oldVNode._flags & MATCHED) === 0 &&
+					key == oldVNode.key &&
+					type === oldVNode.type
+				) {
+					return x;
+				}
+				x--;
+			}
+
+			if (y < oldChildren.length) {
+				oldVNode = oldChildren[y];
+				if (
+					oldVNode &&
+					(oldVNode._flags & MATCHED) === 0 &&
+					key == oldVNode.key &&
+					type === oldVNode.type
+				) {
+					return y;
+				}
+				y++;
+			}
+		}
+	}
+
+	return -1;
+}

node_modules/preact/src/diff/index.js

@@ -0,0 +1,642 @@
+import {
+	EMPTY_OBJ,
+	MODE_HYDRATE,
+	MODE_SUSPENDED,
+	RESET_MODE
+} from '../constants';
+import { BaseComponent, getDomSibling } from '../component';
+import { Fragment } from '../create-element';
+import { diffChildren } from './children';
+import { setProperty } from './props';
+import { assign, isArray, removeNode, slice } from '../util';
+import options from '../options';
+
+/**
+ * Diff two virtual nodes and apply proper changes to the DOM
+ * @param {PreactElement} parentDom The parent of the DOM element
+ * @param {VNode} newVNode The new virtual node
+ * @param {VNode} oldVNode The old virtual node
+ * @param {object} globalContext The current context object. Modified by
+ * getChildContext
+ * @param {string} namespace Current namespace of the DOM node (HTML, SVG, or MathML)
+ * @param {Array<PreactElement>} excessDomChildren
+ * @param {Array<Component>} commitQueue List of components which have callbacks
+ * to invoke in commitRoot
+ * @param {PreactElement} oldDom The current attached DOM element any new dom
+ * elements should be placed around. Likely `null` on first render (except when
+ * hydrating). Can be a sibling DOM element when diffing Fragments that have
+ * siblings. In most cases, it starts out as `oldChildren[0]._dom`.
+ * @param {boolean} isHydrating Whether or not we are in hydration
+ * @param {any[]} refQueue an array of elements needed to invoke refs
+ */
+export function diff(
+	parentDom,
+	newVNode,
+	oldVNode,
+	globalContext,
+	namespace,
+	excessDomChildren,
+	commitQueue,
+	oldDom,
+	isHydrating,
+	refQueue
+) {
+	/** @type {any} */
+	let tmp,
+		newType = newVNode.type;
+
+	// When passing through createElement it assigns the object
+	// constructor as undefined. This to prevent JSON-injection.
+	if (newVNode.constructor !== undefined) return null;
+
+	// If the previous diff bailed out, resume creating/hydrating.
+	if (oldVNode._flags & MODE_SUSPENDED) {
+		isHydrating = !!(oldVNode._flags & MODE_HYDRATE);
+		oldDom = newVNode._dom = oldVNode._dom;
+		excessDomChildren = [oldDom];
+	}
+
+	if ((tmp = options._diff)) tmp(newVNode);
+
+	outer: if (typeof newType == 'function') {
+		try {
+			let c, isNew, oldProps, oldState, snapshot, clearProcessingException;
+			let newProps = newVNode.props;
+			const isClassComponent =
+				'prototype' in newType && newType.prototype.render;
+
+			// Necessary for createContext api. Setting this property will pass
+			// the context value as `this.context` just for this component.
+			tmp = newType.contextType;
+			let provider = tmp && globalContext[tmp._id];
+			let componentContext = tmp
+				? provider
+					? provider.props.value
+					: tmp._defaultValue
+				: globalContext;
+
+			// Get component and set it to `c`
+			if (oldVNode._component) {
+				c = newVNode._component = oldVNode._component;
+				clearProcessingException = c._processingException = c._pendingError;
+			} else {
+				// Instantiate the new component
+				if (isClassComponent) {
+					// @ts-expect-error The check above verifies that newType is suppose to be constructed
+					newVNode._component = c = new newType(newProps, componentContext); // eslint-disable-line new-cap
+				} else {
+					// @ts-expect-error Trust me, Component implements the interface we want
+					newVNode._component = c = new BaseComponent(
+						newProps,
+						componentContext
+					);
+					c.constructor = newType;
+					c.render = doRender;
+				}
+				if (provider) provider.sub(c);
+
+				c.props = newProps;
+				if (!c.state) c.state = {};
+				c.context = componentContext;
+				c._globalContext = globalContext;
+				isNew = c._dirty = true;
+				c._renderCallbacks = [];
+				c._stateCallbacks = [];
+			}
+
+			// Invoke getDerivedStateFromProps
+			if (isClassComponent && c._nextState == null) {
+				c._nextState = c.state;
+			}
+
+			if (isClassComponent && newType.getDerivedStateFromProps != null) {
+				if (c._nextState == c.state) {
+					c._nextState = assign({}, c._nextState);
+				}
+
+				assign(
+					c._nextState,
+					newType.getDerivedStateFromProps(newProps, c._nextState)
+				);
+			}
+
+			oldProps = c.props;
+			oldState = c.state;
+			c._vnode = newVNode;
+
+			// Invoke pre-render lifecycle methods
+			if (isNew) {
+				if (
+					isClassComponent &&
+					newType.getDerivedStateFromProps == null &&
+					c.componentWillMount != null
+				) {
+					c.componentWillMount();
+				}
+
+				if (isClassComponent && c.componentDidMount != null) {
+					c._renderCallbacks.push(c.componentDidMount);
+				}
+			} else {
+				if (
+					isClassComponent &&
+					newType.getDerivedStateFromProps == null &&
+					newProps !== oldProps &&
+					c.componentWillReceiveProps != null
+				) {
+					c.componentWillReceiveProps(newProps, componentContext);
+				}
+
+				if (
+					!c._force &&
+					((c.shouldComponentUpdate != null &&
+						c.shouldComponentUpdate(
+							newProps,
+							c._nextState,
+							componentContext
+						) === false) ||
+						newVNode._original === oldVNode._original)
+				) {
+					// More info about this here: https://gist.github.com/JoviDeCroock/bec5f2ce93544d2e6070ef8e0036e4e8
+					if (newVNode._original !== oldVNode._original) {
+						// When we are dealing with a bail because of sCU we have to update
+						// the props, state and dirty-state.
+						// when we are dealing with strict-equality we don't as the child could still
+						// be dirtied see #3883
+						c.props = newProps;
+						c.state = c._nextState;
+						c._dirty = false;
+					}
+
+					newVNode._dom = oldVNode._dom;
+					newVNode._children = oldVNode._children;
+					newVNode._children.some(vnode => {
+						if (vnode) vnode._parent = newVNode;
+					});
+
+					for (let i = 0; i < c._stateCallbacks.length; i++) {
+						c._renderCallbacks.push(c._stateCallbacks[i]);
+					}
+					c._stateCallbacks = [];
+
+					if (c._renderCallbacks.length) {
+						commitQueue.push(c);
+					}
+
+					break outer;
+				}
+
+				if (c.componentWillUpdate != null) {
+					c.componentWillUpdate(newProps, c._nextState, componentContext);
+				}
+
+				if (isClassComponent && c.componentDidUpdate != null) {
+					c._renderCallbacks.push(() => {
+						c.componentDidUpdate(oldProps, oldState, snapshot);
+					});
+				}
+			}
+
+			c.context = componentContext;
+			c.props = newProps;
+			c._parentDom = parentDom;
+			c._force = false;
+
+			let renderHook = options._render,
+				count = 0;
+			if (isClassComponent) {
+				c.state = c._nextState;
+				c._dirty = false;
+
+				if (renderHook) renderHook(newVNode);
+
+				tmp = c.render(c.props, c.state, c.context);
+
+				for (let i = 0; i < c._stateCallbacks.length; i++) {
+					c._renderCallbacks.push(c._stateCallbacks[i]);
+				}
+				c._stateCallbacks = [];
+			} else {
+				do {
+					c._dirty = false;
+					if (renderHook) renderHook(newVNode);
+
+					tmp = c.render(c.props, c.state, c.context);
+
+					// Handle setState called in render, see #2553
+					c.state = c._nextState;
+				} while (c._dirty && ++count < 25);
+			}
+
+			// Handle setState called in render, see #2553
+			c.state = c._nextState;
+
+			if (c.getChildContext != null) {
+				globalContext = assign(assign({}, globalContext), c.getChildContext());
+			}
+
+			if (isClassComponent && !isNew && c.getSnapshotBeforeUpdate != null) {
+				snapshot = c.getSnapshotBeforeUpdate(oldProps, oldState);
+			}
+
+			let isTopLevelFragment =
+				tmp != null && tmp.type === Fragment && tmp.key == null;
+			let renderResult = isTopLevelFragment ? tmp.props.children : tmp;
+
+			diffChildren(
+				parentDom,
+				isArray(renderResult) ? renderResult : [renderResult],
+				newVNode,
+				oldVNode,
+				globalContext,
+				namespace,
+				excessDomChildren,
+				commitQueue,
+				oldDom,
+				isHydrating,
+				refQueue
+			);
+
+			c.base = newVNode._dom;
+
+			// We successfully rendered this VNode, unset any stored hydration/bailout state:
+			newVNode._flags &= RESET_MODE;
+
+			if (c._renderCallbacks.length) {
+				commitQueue.push(c);
+			}
+
+			if (clearProcessingException) {
+				c._pendingError = c._processingException = null;
+			}
+		} catch (e) {
+			newVNode._original = null;
+			// if hydrating or creating initial tree, bailout preserves DOM:
+			if (isHydrating || excessDomChildren != null) {
+				newVNode._flags |= isHydrating
+					? MODE_HYDRATE | MODE_SUSPENDED
+					: MODE_HYDRATE;
+
+				while (oldDom && oldDom.nodeType === 8 && oldDom.nextSibling) {
+					oldDom = oldDom.nextSibling;
+				}
+				excessDomChildren[excessDomChildren.indexOf(oldDom)] = null;
+				newVNode._dom = oldDom;
+			} else {
+				newVNode._dom = oldVNode._dom;
+				newVNode._children = oldVNode._children;
+			}
+			options._catchError(e, newVNode, oldVNode);
+		}
+	} else if (
+		excessDomChildren == null &&
+		newVNode._original === oldVNode._original
+	) {
+		newVNode._children = oldVNode._children;
+		newVNode._dom = oldVNode._dom;
+	} else {
+		newVNode._dom = diffElementNodes(
+			oldVNode._dom,
+			newVNode,
+			oldVNode,
+			globalContext,
+			namespace,
+			excessDomChildren,
+			commitQueue,
+			isHydrating,
+			refQueue
+		);
+	}
+
+	if ((tmp = options.diffed)) tmp(newVNode);
+}
+
+/**
+ * @param {Array<Component>} commitQueue List of components
+ * which have callbacks to invoke in commitRoot
+ * @param {VNode} root
+ */
+export function commitRoot(commitQueue, root, refQueue) {
+	root._nextDom = undefined;
+
+	for (let i = 0; i < refQueue.length; i++) {
+		applyRef(refQueue[i], refQueue[++i], refQueue[++i]);
+	}
+
+	if (options._commit) options._commit(root, commitQueue);
+
+	commitQueue.some(c => {
+		try {
+			// @ts-expect-error Reuse the commitQueue variable here so the type changes
+			commitQueue = c._renderCallbacks;
+			c._renderCallbacks = [];
+			commitQueue.some(cb => {
+				// @ts-expect-error See above comment on commitQueue
+				cb.call(c);
+			});
+		} catch (e) {
+			options._catchError(e, c._vnode);
+		}
+	});
+}
+
+/**
+ * Diff two virtual nodes representing DOM element
+ * @param {PreactElement} dom The DOM element representing the virtual nodes
+ * being diffed
+ * @param {VNode} newVNode The new virtual node
+ * @param {VNode} oldVNode The old virtual node
+ * @param {object} globalContext The current context object
+ * @param {string} namespace Current namespace of the DOM node (HTML, SVG, or MathML)
+ * @param {Array<PreactElement>} excessDomChildren
+ * @param {Array<Component>} commitQueue List of components which have callbacks
+ * to invoke in commitRoot
+ * @param {boolean} isHydrating Whether or not we are in hydration
+ * @param {any[]} refQueue an array of elements needed to invoke refs
+ * @returns {PreactElement}
+ */
+function diffElementNodes(
+	dom,
+	newVNode,
+	oldVNode,
+	globalContext,
+	namespace,
+	excessDomChildren,
+	commitQueue,
+	isHydrating,
+	refQueue
+) {
+	let oldProps = oldVNode.props;
+	let newProps = newVNode.props;
+	let nodeType = /** @type {string} */ (newVNode.type);
+	/** @type {any} */
+	let i;
+	/** @type {{ __html?: string }} */
+	let newHtml;
+	/** @type {{ __html?: string }} */
+	let oldHtml;
+	/** @type {ComponentChildren} */
+	let newChildren;
+	let value;
+	let inputValue;
+	let checked;
+
+	// Tracks entering and exiting namespaces when descending through the tree.
+	if (nodeType === 'svg') namespace = 'http://www.w3.org/2000/svg';
+	else if (nodeType === 'math')
+		namespace = 'http://www.w3.org/1998/Math/MathML';
+	else if (!namespace) namespace = 'http://www.w3.org/1999/xhtml';
+
+	if (excessDomChildren != null) {
+		for (i = 0; i < excessDomChildren.length; i++) {
+			value = excessDomChildren[i];
+
+			// if newVNode matches an element in excessDomChildren or the `dom`
+			// argument matches an element in excessDomChildren, remove it from
+			// excessDomChildren so it isn't later removed in diffChildren
+			if (
+				value &&
+				'setAttribute' in value === !!nodeType &&
+				(nodeType ? value.localName === nodeType : value.nodeType === 3)
+			) {
+				dom = value;
+				excessDomChildren[i] = null;
+				break;
+			}
+		}
+	}
+
+	if (dom == null) {
+		if (nodeType === null) {
+			return document.createTextNode(newProps);
+		}
+
+		dom = document.createElementNS(
+			namespace,
+			nodeType,
+			newProps.is && newProps
+		);
+
+		// we are creating a new node, so we can assume this is a new subtree (in
+		// case we are hydrating), this deopts the hydrate
+		if (isHydrating) {
+			if (options._hydrationMismatch)
+				options._hydrationMismatch(newVNode, excessDomChildren);
+			isHydrating = false;
+		}
+		// we created a new parent, so none of the previously attached children can be reused:
+		excessDomChildren = null;
+	}
+
+	if (nodeType === null) {
+		// During hydration, we still have to split merged text from SSR'd HTML.
+		if (oldProps !== newProps && (!isHydrating || dom.data !== newProps)) {
+			dom.data = newProps;
+		}
+	} else {
+		// If excessDomChildren was not null, repopulate it with the current element's children:
+		excessDomChildren = excessDomChildren && slice.call(dom.childNodes);
+
+		oldProps = oldVNode.props || EMPTY_OBJ;
+
+		// If we are in a situation where we are not hydrating but are using
+		// existing DOM (e.g. replaceNode) we should read the existing DOM
+		// attributes to diff them
+		if (!isHydrating && excessDomChildren != null) {
+			oldProps = {};
+			for (i = 0; i < dom.attributes.length; i++) {
+				value = dom.attributes[i];
+				oldProps[value.name] = value.value;
+			}
+		}
+
+		for (i in oldProps) {
+			value = oldProps[i];
+			if (i == 'children') {
+			} else if (i == 'dangerouslySetInnerHTML') {
+				oldHtml = value;
+			} else if (!(i in newProps)) {
+				if (
+					(i == 'value' && 'defaultValue' in newProps) ||
+					(i == 'checked' && 'defaultChecked' in newProps)
+				) {
+					continue;
+				}
+				setProperty(dom, i, null, value, namespace);
+			}
+		}
+
+		// During hydration, props are not diffed at all (including dangerouslySetInnerHTML)
+		// @TODO we should warn in debug mode when props don't match here.
+		for (i in newProps) {
+			value = newProps[i];
+			if (i == 'children') {
+				newChildren = value;
+			} else if (i == 'dangerouslySetInnerHTML') {
+				newHtml = value;
+			} else if (i == 'value') {
+				inputValue = value;
+			} else if (i == 'checked') {
+				checked = value;
+			} else if (
+				(!isHydrating || typeof value == 'function') &&
+				oldProps[i] !== value
+			) {
+				setProperty(dom, i, value, oldProps[i], namespace);
+			}
+		}
+
+		// If the new vnode didn't have dangerouslySetInnerHTML, diff its children
+		if (newHtml) {
+			// Avoid re-applying the same '__html' if it did not changed between re-render
+			if (
+				!isHydrating &&
+				(!oldHtml ||
+					(newHtml.__html !== oldHtml.__html &&
+						newHtml.__html !== dom.innerHTML))
+			) {
+				dom.innerHTML = newHtml.__html;
+			}
+
+			newVNode._children = [];
+		} else {
+			if (oldHtml) dom.innerHTML = '';
+
+			diffChildren(
+				dom,
+				isArray(newChildren) ? newChildren : [newChildren],
+				newVNode,
+				oldVNode,
+				globalContext,
+				nodeType === 'foreignObject'
+					? 'http://www.w3.org/1999/xhtml'
+					: namespace,
+				excessDomChildren,
+				commitQueue,
+				excessDomChildren
+					? excessDomChildren[0]
+					: oldVNode._children && getDomSibling(oldVNode, 0),
+				isHydrating,
+				refQueue
+			);
+
+			// Remove children that are not part of any vnode.
+			if (excessDomChildren != null) {
+				for (i = excessDomChildren.length; i--; ) {
+					removeNode(excessDomChildren[i]);
+				}
+			}
+		}
+
+		// As above, don't diff props during hydration
+		if (!isHydrating) {
+			i = 'value';
+			if (nodeType === 'progress' && inputValue == null) {
+				dom.removeAttribute('value');
+			} else if (
+				inputValue !== undefined &&
+				// #2756 For the <progress>-element the initial value is 0,
+				// despite the attribute not being present. When the attribute
+				// is missing the progress bar is treated as indeterminate.
+				// To fix that we'll always update it when it is 0 for progress elements
+				(inputValue !== dom[i] ||
+					(nodeType === 'progress' && !inputValue) ||
+					// This is only for IE 11 to fix <select> value not being updated.
+					// To avoid a stale select value we need to set the option.value
+					// again, which triggers IE11 to re-evaluate the select value
+					(nodeType === 'option' && inputValue !== oldProps[i]))
+			) {
+				setProperty(dom, i, inputValue, oldProps[i], namespace);
+			}
+
+			i = 'checked';
+			if (checked !== undefined && checked !== dom[i]) {
+				setProperty(dom, i, checked, oldProps[i], namespace);
+			}
+		}
+	}
+
+	return dom;
+}
+
+/**
+ * Invoke or update a ref, depending on whether it is a function or object ref.
+ * @param {Ref<any> & { _unmount?: unknown }} ref
+ * @param {any} value
+ * @param {VNode} vnode
+ */
+export function applyRef(ref, value, vnode) {
+	try {
+		if (typeof ref == 'function') {
+			let hasRefUnmount = typeof ref._unmount == 'function';
+			if (hasRefUnmount) {
+				// @ts-ignore TS doesn't like moving narrowing checks into variables
+				ref._unmount();
+			}
+
+			if (!hasRefUnmount || value != null) {
+				// Store the cleanup function on the function
+				// instance object itself to avoid shape
+				// transitioning vnode
+				ref._unmount = ref(value);
+			}
+		} else ref.current = value;
+	} catch (e) {
+		options._catchError(e, vnode);
+	}
+}
+
+/**
+ * Unmount a virtual node from the tree and apply DOM changes
+ * @param {VNode} vnode The virtual node to unmount
+ * @param {VNode} parentVNode The parent of the VNode that initiated the unmount
+ * @param {boolean} [skipRemove] Flag that indicates that a parent node of the
+ * current element is already detached from the DOM.
+ */
+export function unmount(vnode, parentVNode, skipRemove) {
+	let r;
+	if (options.unmount) options.unmount(vnode);
+
+	if ((r = vnode.ref)) {
+		if (!r.current || r.current === vnode._dom) {
+			applyRef(r, null, parentVNode);
+		}
+	}
+
+	if ((r = vnode._component) != null) {
+		if (r.componentWillUnmount) {
+			try {
+				r.componentWillUnmount();
+			} catch (e) {
+				options._catchError(e, parentVNode);
+			}
+		}
+
+		r.base = r._parentDom = null;
+	}
+
+	if ((r = vnode._children)) {
+		for (let i = 0; i < r.length; i++) {
+			if (r[i]) {
+				unmount(
+					r[i],
+					parentVNode,
+					skipRemove || typeof vnode.type != 'function'
+				);
+			}
+		}
+	}
+
+	if (!skipRemove) {
+		removeNode(vnode._dom);
+	}
+
+	// Must be set to `undefined` to properly clean up `_nextDom`
+	// for which `null` is a valid value. See comment in `create-element.js`
+	vnode._component = vnode._parent = vnode._dom = vnode._nextDom = undefined;
+}
+
+/** The `.render()` method for a PFC backing instance. */
+function doRender(props, state, context) {
+	return this.constructor(props, context);
+}

node_modules/preact/src/diff/props.js

@@ -0,0 +1,175 @@
+import { IS_NON_DIMENSIONAL } from '../constants';
+import options from '../options';
+
+function setStyle(style, key, value) {
+	if (key[0] === '-') {
+		style.setProperty(key, value == null ? '' : value);
+	} else if (value == null) {
+		style[key] = '';
+	} else if (typeof value != 'number' || IS_NON_DIMENSIONAL.test(key)) {
+		style[key] = value;
+	} else {
+		style[key] = value + 'px';
+	}
+}
+
+// A logical clock to solve issues like https://github.com/preactjs/preact/issues/3927.
+// When the DOM performs an event it leaves micro-ticks in between bubbling up which means that
+// an event can trigger on a newly reated DOM-node while the event bubbles up.
+//
+// Originally inspired by Vue
+// (https://github.com/vuejs/core/blob/caeb8a68811a1b0f79/packages/runtime-dom/src/modules/events.ts#L90-L101),
+// but modified to use a logical clock instead of Date.now() in case event handlers get attached
+// and events get dispatched during the same millisecond.
+//
+// The clock is incremented after each new event dispatch. This allows 1 000 000 new events
+// per second for over 280 years before the value reaches Number.MAX_SAFE_INTEGER (2**53 - 1).
+let eventClock = 0;
+
+/**
+ * Set a property value on a DOM node
+ * @param {PreactElement} dom The DOM node to modify
+ * @param {string} name The name of the property to set
+ * @param {*} value The value to set the property to
+ * @param {*} oldValue The old value the property had
+ * @param {string} namespace Whether or not this DOM node is an SVG node or not
+ */
+export function setProperty(dom, name, value, oldValue, namespace) {
+	let useCapture;
+
+	o: if (name === 'style') {
+		if (typeof value == 'string') {
+			dom.style.cssText = value;
+		} else {
+			if (typeof oldValue == 'string') {
+				dom.style.cssText = oldValue = '';
+			}
+
+			if (oldValue) {
+				for (name in oldValue) {
+					if (!(value && name in value)) {
+						setStyle(dom.style, name, '');
+					}
+				}
+			}
+
+			if (value) {
+				for (name in value) {
+					if (!oldValue || value[name] !== oldValue[name]) {
+						setStyle(dom.style, name, value[name]);
+					}
+				}
+			}
+		}
+	}
+	// Benchmark for comparison: https://esbench.com/bench/574c954bdb965b9a00965ac6
+	else if (name[0] === 'o' && name[1] === 'n') {
+		useCapture =
+			name !== (name = name.replace(/(PointerCapture)$|Capture$/i, '$1'));
+
+		// Infer correct casing for DOM built-in events:
+		if (
+			name.toLowerCase() in dom ||
+			name === 'onFocusOut' ||
+			name === 'onFocusIn'
+		)
+			name = name.toLowerCase().slice(2);
+		else name = name.slice(2);
+
+		if (!dom._listeners) dom._listeners = {};
+		dom._listeners[name + useCapture] = value;
+
+		if (value) {
+			if (!oldValue) {
+				value._attached = eventClock;
+				dom.addEventListener(
+					name,
+					useCapture ? eventProxyCapture : eventProxy,
+					useCapture
+				);
+			} else {
+				value._attached = oldValue._attached;
+			}
+		} else {
+			dom.removeEventListener(
+				name,
+				useCapture ? eventProxyCapture : eventProxy,
+				useCapture
+			);
+		}
+	} else {
+		if (namespace == 'http://www.w3.org/2000/svg') {
+			// Normalize incorrect prop usage for SVG:
+			// - xlink:href / xlinkHref --> href (xlink:href was removed from SVG and isn't needed)
+			// - className --> class
+			name = name.replace(/xlink(H|:h)/, 'h').replace(/sName$/, 's');
+		} else if (
+			name != 'width' &&
+			name != 'height' &&
+			name != 'href' &&
+			name != 'list' &&
+			name != 'form' &&
+			// Default value in browsers is `-1` and an empty string is
+			// cast to `0` instead
+			name != 'tabIndex' &&
+			name != 'download' &&
+			name != 'rowSpan' &&
+			name != 'colSpan' &&
+			name != 'role' &&
+			name != 'popover' &&
+			name in dom
+		) {
+			try {
+				dom[name] = value == null ? '' : value;
+				// labelled break is 1b smaller here than a return statement (sorry)
+				break o;
+			} catch (e) {}
+		}
+
+		// aria- and data- attributes have no boolean representation.
+		// A `false` value is different from the attribute not being
+		// present, so we can't remove it. For non-boolean aria
+		// attributes we could treat false as a removal, but the
+		// amount of exceptions would cost too many bytes. On top of
+		// that other frameworks generally stringify `false`.
+
+		if (typeof value == 'function') {
+			// never serialize functions as attribute values
+		} else if (value != null && (value !== false || name[4] === '-')) {
+			dom.setAttribute(name, name == 'popover' && value == true ? '' : value);
+		} else {
+			dom.removeAttribute(name);
+		}
+	}
+}
+
+/**
+ * Create an event proxy function.
+ * @param {boolean} useCapture Is the event handler for the capture phase.
+ * @private
+ */
+function createEventProxy(useCapture) {
+	/**
+	 * Proxy an event to hooked event handlers
+	 * @param {PreactEvent} e The event object from the browser
+	 * @private
+	 */
+	return function (e) {
+		if (this._listeners) {
+			const eventHandler = this._listeners[e.type + useCapture];
+			if (e._dispatched == null) {
+				e._dispatched = eventClock++;
+
+				// When `e._dispatched` is smaller than the time when the targeted event
+				// handler was attached we know we have bubbled up to an element that was added
+				// during patching the DOM.
+			} else if (e._dispatched < eventHandler._attached) {
+				return;
+			}
+			return eventHandler(options.event ? options.event(e) : e);
+		}
+	};
+}
+
+const eventProxy = createEventProxy(false);
+const eventProxyCapture = createEventProxy(true);