812 lines
24 KiB
TypeScript
812 lines
24 KiB
TypeScript
import type {
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VirtualElement,
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VirtualElementComponent,
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VirtualElementTag,
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VirtualElementParent,
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VirtualElementChildren,
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VirtualElementReal,
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VirtualElementFragment,
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} from './teact';
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import {
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hasElementChanged,
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isComponentElement,
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isTagElement,
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isParentElement,
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isTextElement,
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isEmptyElement,
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mountComponent,
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renderComponent,
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unmountComponent,
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isFragmentElement,
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runImmediateEffects,
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willRunImmediateEffects,
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} from './teact';
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import { DEBUG } from '../../config';
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import { addEventListener, removeAllDelegatedListeners, removeEventListener } from './dom-events';
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import { unique } from '../../util/iteratees';
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interface VirtualDomHead {
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children: [VirtualElement] | [];
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}
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interface SelectionState {
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selectionStart: number | null;
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selectionEnd: number | null;
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isCaretAtEnd: boolean;
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}
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const FILTERED_ATTRIBUTES = new Set(['key', 'ref', 'teactFastList', 'teactOrderKey']);
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const HTML_ATTRIBUTES = new Set(['dir', 'role', 'form']);
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const CONTROLLABLE_TAGS = ['INPUT', 'TEXTAREA', 'SELECT'];
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const MAPPED_ATTRIBUTES: { [k: string]: string } = {
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autoPlay: 'autoplay',
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autoComplete: 'autocomplete',
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};
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const INDEX_KEY_PREFIX = '__indexKey#';
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const headsByElement = new WeakMap<Element, VirtualDomHead>();
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const extraClasses = new WeakMap<Element, Set<string>>();
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// eslint-disable-next-line @typescript-eslint/naming-convention
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let DEBUG_virtualTreeSize = 1;
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function render($element: VirtualElement | undefined, parentEl: HTMLElement) {
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if (!headsByElement.has(parentEl)) {
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headsByElement.set(parentEl, { children: [] });
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}
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const $head = headsByElement.get(parentEl)!;
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const $newElement = renderWithVirtual(parentEl, $head.children[0], $element, $head, 0);
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if (!willRunImmediateEffects()) {
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runImmediateEffects();
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}
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$head.children = $newElement ? [$newElement] : [];
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if (process.env.APP_ENV === 'perf') {
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DEBUG_virtualTreeSize = 0;
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DEBUG_addToVirtualTreeSize($head);
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return DEBUG_virtualTreeSize;
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}
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return undefined;
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}
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function renderWithVirtual<T extends VirtualElement | undefined>(
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parentEl: HTMLElement,
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$current: VirtualElement | undefined,
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$new: T,
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$parent: VirtualElementParent | VirtualDomHead,
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index: number,
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options: {
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skipComponentUpdate?: boolean;
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nextSibling?: ChildNode;
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forceMoveToEnd?: boolean;
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fragment?: DocumentFragment;
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} = {},
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): T {
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const { skipComponentUpdate, fragment } = options;
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let { nextSibling } = options;
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const isCurrentComponent = $current && isComponentElement($current);
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const isNewComponent = $new && isComponentElement($new);
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const $newAsReal = $new as VirtualElementReal;
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const isCurrentFragment = $current && !isCurrentComponent && isFragmentElement($current);
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const isNewFragment = $new && !isNewComponent && isFragmentElement($new);
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if (
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!skipComponentUpdate
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&& isCurrentComponent && isNewComponent
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&& !hasElementChanged($current!, $new!)
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) {
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$new = updateComponent($current, $new as VirtualElementComponent) as typeof $new;
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}
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// Parent element may have changed, so we need to update the listener closure.
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if (!skipComponentUpdate && isNewComponent && ($new as VirtualElementComponent).componentInstance.isMounted) {
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setupComponentUpdateListener(parentEl, $new as VirtualElementComponent, $parent, index);
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}
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if ($current === $new) {
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return $new;
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}
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if (DEBUG && $new) {
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const newTarget = 'target' in $new && $new.target;
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if (newTarget && (!$current || ('target' in $current && newTarget !== $current.target))) {
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throw new Error('[Teact] Cached virtual element was moved within tree');
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}
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}
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if (!$current && $new) {
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if (isNewComponent || isNewFragment) {
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if (isNewComponent) {
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$new = initComponent(parentEl, $new as VirtualElementComponent, $parent, index) as unknown as typeof $new;
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}
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mountChildren(parentEl, $new as VirtualElementComponent | VirtualElementFragment, { nextSibling, fragment });
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} else {
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const node = createNode($newAsReal);
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$newAsReal.target = node;
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insertBefore(fragment || parentEl, node, nextSibling);
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}
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} else if ($current && !$new) {
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remount(parentEl, $current, undefined);
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} else if ($current && $new) {
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if (hasElementChanged($current, $new)) {
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if (!nextSibling) {
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nextSibling = getNextSibling($current);
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}
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if (isNewComponent || isNewFragment) {
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if (isNewComponent) {
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$new = initComponent(parentEl, $new as VirtualElementComponent, $parent, index) as unknown as typeof $new;
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}
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remount(parentEl, $current, undefined);
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mountChildren(parentEl, $new as VirtualElementComponent | VirtualElementFragment, { nextSibling, fragment });
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} else {
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const node = createNode($newAsReal);
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$newAsReal.target = node;
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remount(parentEl, $current, node, nextSibling);
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}
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} else {
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const isComponent = isCurrentComponent && isNewComponent;
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const isFragment = isCurrentFragment && isNewFragment;
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if (isComponent || isFragment) {
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($new as VirtualElementComponent | VirtualElementFragment).children = renderChildren(
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$current,
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$new as VirtualElementComponent | VirtualElementFragment,
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parentEl,
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nextSibling,
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options.forceMoveToEnd,
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);
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} else {
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const $currentAsReal = $current as VirtualElementReal;
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const currentTarget = $currentAsReal.target!;
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$newAsReal.target = currentTarget;
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$currentAsReal.target = undefined; // Help GC
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const isTag = isTagElement($current);
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if (isTag) {
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const $newAsTag = $new as VirtualElementTag;
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$newAsTag.props.ref = $current.props.ref;
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if (nextSibling || options.forceMoveToEnd) {
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insertBefore(parentEl, currentTarget, nextSibling);
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}
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updateAttributes($current, $newAsTag, currentTarget as HTMLElement);
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$newAsTag.children = renderChildren(
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$current,
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$newAsTag,
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currentTarget as HTMLElement,
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);
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}
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}
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}
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}
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return $new;
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}
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function initComponent(
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parentEl: HTMLElement,
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$element: VirtualElementComponent,
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$parent: VirtualElementParent | VirtualDomHead,
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index: number,
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) {
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const { componentInstance } = $element;
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if (!componentInstance.isMounted) {
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$element = mountComponent(componentInstance);
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setupComponentUpdateListener(parentEl, $element, $parent, index);
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const $firstChild = $element.children[0];
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if (isComponentElement($firstChild)) {
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$element.children = [initComponent(parentEl, $firstChild, $element, 0)];
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}
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componentInstance.isMounted = true;
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}
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return $element;
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}
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function updateComponent($current: VirtualElementComponent, $new: VirtualElementComponent) {
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$current.componentInstance.props = $new.componentInstance.props;
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return renderComponent($current.componentInstance);
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}
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function setupComponentUpdateListener(
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parentEl: HTMLElement,
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$element: VirtualElementComponent,
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$parent: VirtualElementParent | VirtualDomHead,
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index: number,
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) {
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const { componentInstance } = $element;
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componentInstance.onUpdate = () => {
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$parent.children[index] = renderWithVirtual(
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parentEl,
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$parent.children[index],
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componentInstance.$element,
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$parent,
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index,
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{ skipComponentUpdate: true },
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);
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};
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}
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function mountChildren(
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parentEl: HTMLElement,
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$element: VirtualElementComponent | VirtualElementFragment,
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options: {
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nextSibling?: ChildNode;
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fragment?: DocumentFragment;
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},
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) {
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$element.children = $element.children.map(($child, i) => {
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return renderWithVirtual(parentEl, undefined, $child, $element, i, options);
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});
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}
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function unmountChildren(parentEl: HTMLElement, $element: VirtualElementComponent | VirtualElementFragment) {
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$element.children.forEach(($child) => {
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renderWithVirtual(parentEl, $child, undefined, $element, -1);
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});
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}
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function createNode($element: VirtualElementReal): Node {
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if (isEmptyElement($element)) {
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return document.createTextNode('');
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}
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if (isTextElement($element)) {
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return document.createTextNode($element.value);
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}
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const { tag, props, children = [] } = $element;
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const element = document.createElement(tag);
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if (typeof props.ref === 'object') {
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props.ref.current = element;
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} else if (typeof props.ref === 'function') {
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props.ref(element);
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}
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processControlled(tag, props);
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Object.entries(props).forEach(([key, value]) => {
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if (props[key] !== undefined) {
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setAttribute(element, key, value);
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}
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});
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processUncontrolledOnMount(element, props);
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$element.children = children.map(($child, i) => (
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renderWithVirtual(element, undefined, $child, $element, i)
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));
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return element;
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}
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function remount(
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parentEl: HTMLElement,
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$current: VirtualElement,
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node: Node | undefined,
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componentNextSibling?: ChildNode,
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) {
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const isComponent = isComponentElement($current);
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const isFragment = !isComponent && isFragmentElement($current);
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if (isComponent || isFragment) {
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if (isComponent) {
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unmountComponent($current.componentInstance);
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}
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unmountChildren(parentEl, $current);
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if (node) {
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insertBefore(parentEl, node, componentNextSibling);
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}
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} else {
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if (node) {
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parentEl.replaceChild(node, $current.target!);
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} else {
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parentEl.removeChild($current.target!);
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}
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unmountRealTree($current);
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}
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}
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function unmountRealTree($element: VirtualElement) {
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if (isComponentElement($element)) {
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unmountComponent($element.componentInstance);
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} else if (!isFragmentElement($element)) {
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if (isTagElement($element)) {
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const { target } = $element;
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if (target) {
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extraClasses.delete(target);
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removeAllDelegatedListeners(target);
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if ($element.props.ref?.current === target) {
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$element.props.ref.current = undefined;
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}
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}
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}
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if ($element.target) {
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$element.target = undefined; // Help GC
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}
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if (!isParentElement($element)) {
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return;
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}
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}
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$element.children.forEach(unmountRealTree);
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}
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function insertBefore(parentEl: HTMLElement | DocumentFragment, node: Node, nextSibling?: ChildNode) {
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if (nextSibling) {
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parentEl.insertBefore(node, nextSibling);
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} else {
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parentEl.appendChild(node);
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}
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}
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function getNextSibling($current: VirtualElement): ChildNode | undefined {
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if (isComponentElement($current) || isFragmentElement($current)) {
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const lastChild = $current.children[$current.children.length - 1];
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return getNextSibling(lastChild);
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}
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return $current.target!.nextSibling || undefined;
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}
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function renderChildren(
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$current: VirtualElementParent,
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$new: VirtualElementParent,
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currentEl: HTMLElement,
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nextSibling?: ChildNode,
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forceMoveToEnd = false,
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) {
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if (DEBUG) {
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DEBUG_checkKeyUniqueness($new.children);
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}
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if (('props' in $new) && $new.props.teactFastList) {
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return renderFastListChildren($current, $new, currentEl);
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}
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const currentChildrenLength = $current.children.length;
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const newChildrenLength = $new.children.length;
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const maxLength = Math.max(currentChildrenLength, newChildrenLength);
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const newChildren = [];
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const fragment = newChildrenLength > currentChildrenLength ? document.createDocumentFragment() : undefined;
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const lastCurrentChild = $current.children[currentChildrenLength - 1];
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const fragmentNextSibling = fragment && (
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nextSibling || (lastCurrentChild ? getNextSibling(lastCurrentChild) : undefined)
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);
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for (let i = 0; i < maxLength; i++) {
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const $newChild = renderWithVirtual(
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currentEl,
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$current.children[i],
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$new.children[i],
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$new,
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i,
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i >= currentChildrenLength ? { fragment } : { nextSibling, forceMoveToEnd },
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);
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if ($newChild) {
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newChildren.push($newChild);
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}
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}
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if (fragment) {
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insertBefore(currentEl, fragment, fragmentNextSibling);
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}
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return newChildren;
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}
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// This function allows to prepend/append a bunch of new DOM nodes to the top/bottom of preserved ones.
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// It also allows to selectively move particular preserved nodes within their DOM list.
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function renderFastListChildren($current: VirtualElementParent, $new: VirtualElementParent, currentEl: HTMLElement) {
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const newKeys = new Set(
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$new.children.map(($newChild) => {
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const key = 'props' in $newChild ? $newChild.props.key : undefined;
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if (DEBUG && isParentElement($newChild)) {
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// eslint-disable-next-line no-null/no-null
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if (key === undefined || key === null) {
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// eslint-disable-next-line no-console
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console.warn('Missing `key` in `teactFastList`');
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}
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if (isFragmentElement($newChild)) {
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throw new Error('[Teact] Fragment can not be child of container with `teactFastList`');
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}
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}
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return key;
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}),
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);
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// Build a collection of old children that also remain in the new list
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let currentRemainingIndex = 0;
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const remainingByKey = $current.children
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.reduce((acc, $currentChild, i) => {
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let key = 'props' in $currentChild ? $currentChild.props.key : undefined;
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// eslint-disable-next-line no-null/no-null
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const isKeyPresent = key !== undefined && key !== null;
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// First we process removed children
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if (isKeyPresent && !newKeys.has(key)) {
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renderWithVirtual(currentEl, $currentChild, undefined, $new, -1);
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return acc;
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} else if (!isKeyPresent) {
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const $newChild = $new.children[i];
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const newChildKey = ($newChild && 'props' in $newChild) ? $newChild.props.key : undefined;
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// If a non-key element remains at the same index we preserve it with a virtual `key`
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if ($newChild && !newChildKey) {
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key = `${INDEX_KEY_PREFIX}${i}`;
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// Otherwise, we just remove it
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} else {
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renderWithVirtual(currentEl, $currentChild, undefined, $new, -1);
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return acc;
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}
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}
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// Then we build up info about remaining children
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acc[key] = {
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$element: $currentChild,
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index: currentRemainingIndex++,
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orderKey: 'props' in $currentChild ? $currentChild.props.teactOrderKey : undefined,
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};
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return acc;
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}, {} as Record<string, { $element: VirtualElement; index: number; orderKey?: number }>);
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let newChildren: VirtualElement[] = [];
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let fragmentElements: VirtualElement[] | undefined;
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let fragmentIndex: number | undefined;
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let currentPreservedIndex = 0;
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$new.children.forEach(($newChild, i) => {
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const key = 'props' in $newChild ? $newChild.props.key : `${INDEX_KEY_PREFIX}${i}`;
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const currentChildInfo = remainingByKey[key];
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if (!currentChildInfo) {
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if (!fragmentElements) {
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fragmentElements = [];
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fragmentIndex = i;
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}
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fragmentElements.push($newChild);
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return;
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}
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// This prepends new children to the top
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if (fragmentElements) {
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newChildren = newChildren.concat(renderFragment(fragmentElements, fragmentIndex!, currentEl, $new));
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fragmentElements = undefined;
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fragmentIndex = undefined;
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}
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// Now we check if a preserved node was moved within preserved list
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const newOrderKey = 'props' in $newChild ? $newChild.props.teactOrderKey : undefined;
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// That is indicated by a changed `teactOrderKey` value
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const shouldMoveNode = (
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currentChildInfo.index !== currentPreservedIndex && (!newOrderKey || currentChildInfo.orderKey !== newOrderKey)
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);
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const isMovingDown = shouldMoveNode && currentPreservedIndex > currentChildInfo.index;
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if (!shouldMoveNode || isMovingDown) {
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currentPreservedIndex++;
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}
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const nextSibling = currentEl.childNodes[isMovingDown ? i + 1 : i];
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const options = shouldMoveNode ? (nextSibling ? { nextSibling } : { forceMoveToEnd: true }) : undefined;
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newChildren.push(renderWithVirtual(currentEl, currentChildInfo.$element, $newChild, $new, i, options));
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});
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// This appends new children to the bottom
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if (fragmentElements) {
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newChildren = newChildren.concat(renderFragment(fragmentElements, fragmentIndex!, currentEl, $new));
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}
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return newChildren;
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}
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function renderFragment(
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elements: VirtualElement[], fragmentIndex: number, parentEl: HTMLElement, $parent: VirtualElementParent,
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) {
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const nextSibling = parentEl.childNodes[fragmentIndex];
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if (elements.length === 1) {
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return [renderWithVirtual(parentEl, undefined, elements[0], $parent, fragmentIndex, { nextSibling })];
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}
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const fragment = document.createDocumentFragment();
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const newChildren = elements.map(($element, i) => (
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renderWithVirtual(parentEl, undefined, $element, $parent, fragmentIndex + i, { fragment })
|
|
));
|
|
|
|
insertBefore(parentEl, fragment, nextSibling);
|
|
|
|
return newChildren;
|
|
}
|
|
|
|
function processControlled(tag: string, props: AnyLiteral) {
|
|
// TODO Remove after tests
|
|
if (!props.teactExperimentControlled) {
|
|
return;
|
|
}
|
|
|
|
const isValueControlled = props.value !== undefined;
|
|
const isCheckedControlled = props.checked !== undefined;
|
|
const isControlled = (isValueControlled || isCheckedControlled) && CONTROLLABLE_TAGS.includes(tag.toUpperCase());
|
|
if (!isControlled) {
|
|
return;
|
|
}
|
|
|
|
const {
|
|
value, checked, onInput, onChange,
|
|
} = props;
|
|
|
|
props.onChange = undefined;
|
|
props.onInput = (e: React.ChangeEvent<HTMLInputElement>) => {
|
|
onInput?.(e);
|
|
onChange?.(e);
|
|
|
|
if (value !== undefined && value !== e.currentTarget.value) {
|
|
const { selectionStart, selectionEnd } = e.currentTarget;
|
|
const isCaretAtEnd = selectionStart === selectionEnd && selectionEnd === e.currentTarget.value.length;
|
|
|
|
e.currentTarget.value = value;
|
|
|
|
if (typeof selectionStart === 'number' && typeof selectionEnd === 'number') {
|
|
e.currentTarget.setSelectionRange(selectionStart, selectionEnd);
|
|
|
|
const selectionState: SelectionState = { selectionStart, selectionEnd, isCaretAtEnd };
|
|
// eslint-disable-next-line no-underscore-dangle
|
|
e.currentTarget.dataset.__teactSelectionState = JSON.stringify(selectionState);
|
|
}
|
|
}
|
|
|
|
if (checked !== undefined) {
|
|
e.currentTarget.checked = checked;
|
|
}
|
|
};
|
|
}
|
|
|
|
function processUncontrolledOnMount(element: HTMLElement, props: AnyLiteral) {
|
|
if (!CONTROLLABLE_TAGS.includes(element.tagName)) {
|
|
return;
|
|
}
|
|
|
|
if (props.defaultValue) {
|
|
setAttribute(element, 'value', props.defaultValue);
|
|
}
|
|
|
|
if (props.defaultChecked) {
|
|
setAttribute(element, 'checked', props.defaultChecked);
|
|
}
|
|
}
|
|
|
|
function updateAttributes($current: VirtualElementTag, $new: VirtualElementTag, element: HTMLElement) {
|
|
processControlled(element.tagName, $new.props);
|
|
|
|
const currentEntries = Object.entries($current.props);
|
|
const newEntries = Object.entries($new.props);
|
|
|
|
currentEntries.forEach(([key, currentValue]) => {
|
|
const newValue = $new.props[key];
|
|
|
|
if (
|
|
currentValue !== undefined
|
|
&& (
|
|
newValue === undefined
|
|
|| (currentValue !== newValue && key.startsWith('on'))
|
|
)
|
|
) {
|
|
removeAttribute(element, key, currentValue);
|
|
}
|
|
});
|
|
|
|
newEntries.forEach(([key, newValue]) => {
|
|
const currentValue = $current.props[key];
|
|
|
|
if (newValue !== undefined && newValue !== currentValue) {
|
|
setAttribute(element, key, newValue);
|
|
}
|
|
});
|
|
}
|
|
|
|
function setAttribute(element: HTMLElement, key: string, value: any) {
|
|
if (key === 'className') {
|
|
updateClassName(element, value);
|
|
} else if (key === 'value') {
|
|
const inputEl = element as HTMLInputElement;
|
|
|
|
if (inputEl.value !== value) {
|
|
inputEl.value = value;
|
|
|
|
// eslint-disable-next-line no-underscore-dangle
|
|
const selectionStateJson = inputEl.dataset.__teactSelectionState;
|
|
if (selectionStateJson) {
|
|
const { selectionStart, selectionEnd, isCaretAtEnd } = JSON.parse(selectionStateJson) as SelectionState;
|
|
|
|
if (isCaretAtEnd) {
|
|
const length = inputEl.value.length;
|
|
inputEl.setSelectionRange(length, length);
|
|
} else if (typeof selectionStart === 'number' && typeof selectionEnd === 'number') {
|
|
inputEl.setSelectionRange(selectionStart, selectionEnd);
|
|
}
|
|
}
|
|
}
|
|
} else if (key === 'style') {
|
|
element.style.cssText = value;
|
|
} else if (key === 'dangerouslySetInnerHTML') {
|
|
// eslint-disable-next-line no-underscore-dangle
|
|
element.innerHTML = value.__html;
|
|
} else if (key.startsWith('on')) {
|
|
addEventListener(element, key, value, key.endsWith('Capture'));
|
|
} else if (key.startsWith('data-') || key.startsWith('aria-') || HTML_ATTRIBUTES.has(key)) {
|
|
element.setAttribute(key, value);
|
|
} else if (!FILTERED_ATTRIBUTES.has(key)) {
|
|
(element as any)[MAPPED_ATTRIBUTES[key] || key] = value;
|
|
}
|
|
}
|
|
|
|
function removeAttribute(element: HTMLElement, key: string, value: any) {
|
|
if (key === 'className') {
|
|
updateClassName(element, '');
|
|
} else if (key === 'value') {
|
|
(element as HTMLInputElement).value = '';
|
|
} else if (key === 'style') {
|
|
element.style.cssText = '';
|
|
} else if (key === 'dangerouslySetInnerHTML') {
|
|
element.innerHTML = '';
|
|
} else if (key.startsWith('on')) {
|
|
removeEventListener(element, key, value, key.endsWith('Capture'));
|
|
} else if (!FILTERED_ATTRIBUTES.has(key)) {
|
|
element.removeAttribute(key);
|
|
}
|
|
}
|
|
|
|
function updateClassName(element: HTMLElement, value: string) {
|
|
const extra = extraClasses.get(element);
|
|
if (!extra) {
|
|
element.className = value;
|
|
return;
|
|
}
|
|
|
|
const extraArray = Array.from(extra);
|
|
if (value) {
|
|
extraArray.push(value);
|
|
}
|
|
|
|
element.className = extraArray.join(' ');
|
|
}
|
|
|
|
export function addExtraClass(element: Element, className: string, forceSingle = false) {
|
|
if (!forceSingle) {
|
|
const classNames = className.split(' ');
|
|
if (classNames.length > 1) {
|
|
classNames.forEach((cn) => {
|
|
addExtraClass(element, cn, true);
|
|
});
|
|
|
|
return;
|
|
}
|
|
}
|
|
|
|
element.classList.add(className);
|
|
|
|
const classList = extraClasses.get(element);
|
|
if (classList) {
|
|
classList.add(className);
|
|
} else {
|
|
extraClasses.set(element, new Set([className]));
|
|
}
|
|
}
|
|
|
|
export function removeExtraClass(element: Element, className: string, forceSingle = false) {
|
|
if (!forceSingle) {
|
|
const classNames = className.split(' ');
|
|
if (classNames.length > 1) {
|
|
classNames.forEach((cn) => {
|
|
removeExtraClass(element, cn, true);
|
|
});
|
|
|
|
return;
|
|
}
|
|
}
|
|
|
|
element.classList.remove(className);
|
|
|
|
const classList = extraClasses.get(element);
|
|
if (classList) {
|
|
classList.delete(className);
|
|
|
|
if (!classList.size) {
|
|
extraClasses.delete(element);
|
|
}
|
|
}
|
|
}
|
|
|
|
export function toggleExtraClass(element: Element, className: string, force?: boolean, forceSingle = false) {
|
|
if (!forceSingle) {
|
|
const classNames = className.split(' ');
|
|
if (classNames.length > 1) {
|
|
classNames.forEach((cn) => {
|
|
toggleExtraClass(element, cn, force, true);
|
|
});
|
|
|
|
return;
|
|
}
|
|
}
|
|
|
|
element.classList.toggle(className, force);
|
|
|
|
if (element.classList.contains(className)) {
|
|
addExtraClass(element, className);
|
|
} else {
|
|
removeExtraClass(element, className);
|
|
}
|
|
}
|
|
|
|
// eslint-disable-next-line @typescript-eslint/naming-convention
|
|
function DEBUG_addToVirtualTreeSize($current: VirtualElementParent | VirtualDomHead) {
|
|
DEBUG_virtualTreeSize += $current.children.length;
|
|
|
|
$current.children.forEach(($child) => {
|
|
if (isParentElement($child)) {
|
|
DEBUG_addToVirtualTreeSize($child);
|
|
}
|
|
});
|
|
}
|
|
|
|
// eslint-disable-next-line @typescript-eslint/naming-convention
|
|
function DEBUG_checkKeyUniqueness(children: VirtualElementChildren) {
|
|
const firstChild = children[0];
|
|
if (firstChild && 'props' in firstChild && firstChild.props.key !== undefined) {
|
|
const keys = children.reduce((acc: any[], child) => {
|
|
if ('props' in child && child.props.key) {
|
|
acc.push(child.props.key);
|
|
}
|
|
|
|
return acc;
|
|
}, []);
|
|
|
|
if (keys.length !== unique(keys).length) {
|
|
// eslint-disable-next-line no-console
|
|
console.warn('[Teact] Duplicated keys:', keys.filter((e, i, a) => a.indexOf(e) !== i));
|
|
throw new Error('[Teact] Children keys are not unique');
|
|
}
|
|
}
|
|
}
|
|
|
|
const TeactDOM = { render };
|
|
export default TeactDOM;
|