(function (global, factory) {
	typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports, require('node:stream'), require('preact')) :
	typeof define === 'function' && define.amd ? define(['exports', 'node:stream', 'preact'], factory) :
	(global = global || self, factory(global.preactRenderToString = {}, global.node_stream, global.preact));
}(this, (function (exports, node_stream, preact) {
	const UNSAFE_NAME = /[\s\n\\/='"\0<>]/;
	const NAMESPACE_REPLACE_REGEX = /^(xlink|xmlns|xml)([A-Z])/;
	const HTML_LOWER_CASE = /^(?:accessK|auto[A-Z]|cell|ch|col|cont|cross|dateT|encT|form[A-Z]|frame|hrefL|inputM|maxL|minL|noV|playsI|popoverT|readO|rowS|src[A-Z]|tabI|useM|item[A-Z])/;
	const SVG_CAMEL_CASE = /^ac|^ali|arabic|basel|cap|clipPath$|clipRule$|color|dominant|enable|fill|flood|font|glyph[^R]|horiz|image|letter|lighting|marker[^WUH]|overline|panose|pointe|paint|rendering|shape|stop|strikethrough|stroke|text[^L]|transform|underline|unicode|units|^v[^i]|^w|^xH/; // Boolean DOM properties that translate to enumerated ('true'/'false') attributes

	const HTML_ENUMERATED = new Set(['draggable', 'spellcheck']); // DOM properties that should NOT have "px" added when numeric

	const ENCODED_ENTITIES = /["&<]/;
	/** @param {string} str */

	function encodeEntities(str) {
	  // Skip all work for strings with no entities needing encoding:
	  if (str.length === 0 || ENCODED_ENTITIES.test(str) === false) return str;
	  let last = 0,
	      i = 0,
	      out = '',
	      ch = ''; // Seek forward in str until the next entity char:

	  for (; i < str.length; i++) {
	    switch (str.charCodeAt(i)) {
	      case 34:
	        ch = '&quot;';
	        break;

	      case 38:
	        ch = '&amp;';
	        break;

	      case 60:
	        ch = '&lt;';
	        break;

	      default:
	        continue;
	    } // Append skipped/buffered characters and the encoded entity:


	    if (i !== last) out = out + str.slice(last, i);
	    out = out + ch; // Start the next seek/buffer after the entity's offset:

	    last = i + 1;
	  }

	  if (i !== last) out = out + str.slice(last, i);
	  return out;
	}
	const JS_TO_CSS = {};
	const IS_NON_DIMENSIONAL = new Set(['animation-iteration-count', 'border-image-outset', 'border-image-slice', 'border-image-width', 'box-flex', 'box-flex-group', 'box-ordinal-group', 'column-count', 'fill-opacity', 'flex', 'flex-grow', 'flex-negative', 'flex-order', 'flex-positive', 'flex-shrink', 'flood-opacity', 'font-weight', 'grid-column', 'grid-row', 'line-clamp', 'line-height', 'opacity', 'order', 'orphans', 'stop-opacity', 'stroke-dasharray', 'stroke-dashoffset', 'stroke-miterlimit', 'stroke-opacity', 'stroke-width', 'tab-size', 'widows', 'z-index', 'zoom']);
	const CSS_REGEX = /[A-Z]/g; // Convert an Object style to a CSSText string

	function styleObjToCss(s) {
	  let str = '';

	  for (let prop in s) {
	    let val = s[prop];

	    if (val != null && val !== '') {
	      const name = prop[0] == '-' ? prop : JS_TO_CSS[prop] || (JS_TO_CSS[prop] = prop.replace(CSS_REGEX, '-$&').toLowerCase());
	      let suffix = ';';

	      if (typeof val === 'number' && // Exclude custom-attributes
	      !name.startsWith('--') && !IS_NON_DIMENSIONAL.has(name)) {
	        suffix = 'px;';
	      }

	      str = str + name + ':' + val + suffix;
	    }
	  }

	  return str || undefined;
	}

	function markAsDirty() {
	  this.__d = true;
	}

	function createComponent(vnode, context) {
	  return {
	    __v: vnode,
	    context,
	    props: vnode.props,
	    // silently drop state updates
	    setState: markAsDirty,
	    forceUpdate: markAsDirty,
	    __d: true,
	    // hooks
	    __h: new Array(0)
	  };
	} // Necessary for createContext api. Setting this property will pass
	/**
	 * @template T
	 */

	class Deferred {
	  constructor() {
	    // eslint-disable-next-line lines-around-comment

	    /** @type {Promise<T>} */
	    this.promise = new Promise((resolve, reject) => {
	      this.resolve = resolve;
	      this.reject = reject;
	    });
	  }

	}

	// Options hooks
	const DIFF = '__b';
	const RENDER = '__r';
	const DIFFED = 'diffed';
	const COMMIT = '__c';
	const SKIP_EFFECTS = '__s';
	const CATCH_ERROR = '__e'; // VNode properties

	const COMPONENT = '__c';
	const CHILDREN = '__k';
	const PARENT = '__';

	const VNODE = '__v';
	const DIRTY = '__d';
	const NEXT_STATE = '__s';
	const CHILD_DID_SUSPEND = '__c';

	const EMPTY_OBJ = {};
	const EMPTY_ARR = [];
	const isArray = Array.isArray;
	const assign = Object.assign;
	const EMPTY_STR = ''; // Global state for the current render pass

	let beforeDiff, afterDiff, renderHook, ummountHook;
	/**
	 * Render Preact JSX + Components to an HTML string.
	 * @param {VNode} vnode	JSX Element / VNode to render
	 * @param {Object} [context={}] Initial root context object
	 * @param {RendererState} [_rendererState] for internal use
	 * @returns {string} serialized HTML
	 */

	function renderToString(vnode, context, _rendererState) {
	  // Performance optimization: `renderToString` is synchronous and we
	  // therefore don't execute any effects. To do that we pass an empty
	  // array to `options._commit` (`__c`). But we can go one step further
	  // and avoid a lot of dirty checks and allocations by setting
	  // `options._skipEffects` (`__s`) too.
	  const previousSkipEffects = preact.options[SKIP_EFFECTS];
	  preact.options[SKIP_EFFECTS] = true; // store options hooks once before each synchronous render call

	  beforeDiff = preact.options[DIFF];
	  afterDiff = preact.options[DIFFED];
	  renderHook = preact.options[RENDER];
	  ummountHook = preact.options.unmount;
	  const parent = preact.h(preact.Fragment, null);
	  parent[CHILDREN] = [vnode];

	  try {
	    const rendered = _renderToString(vnode, context || EMPTY_OBJ, false, undefined, parent, false, _rendererState);

	    if (isArray(rendered)) {
	      return rendered.join(EMPTY_STR);
	    }

	    return rendered;
	  } catch (e) {
	    if (e.then) {
	      throw new Error('Use "renderToStringAsync" for suspenseful rendering.');
	    }

	    throw e;
	  } finally {
	    // options._commit, we don't schedule any effects in this library right now,
	    // so we can pass an empty queue to this hook.
	    if (preact.options[COMMIT]) preact.options[COMMIT](vnode, EMPTY_ARR);
	    preact.options[SKIP_EFFECTS] = previousSkipEffects;
	    EMPTY_ARR.length = 0;
	  }
	}
	/**
	 * @param {VNode} vnode
	 * @param {Record<string, unknown>} context
	 */

	function renderClassComponent(vnode, context) {
	  let type =
	  /** @type {import("preact").ComponentClass<typeof vnode.props>} */
	  vnode.type;
	  let isMounting = true;
	  let c;

	  if (vnode[COMPONENT]) {
	    isMounting = false;
	    c = vnode[COMPONENT];
	    c.state = c[NEXT_STATE];
	  } else {
	    c = new type(vnode.props, context);
	  }

	  vnode[COMPONENT] = c;
	  c[VNODE] = vnode;
	  c.props = vnode.props;
	  c.context = context; // turn off stateful re-rendering:

	  c[DIRTY] = true;
	  if (c.state == null) c.state = EMPTY_OBJ;

	  if (c[NEXT_STATE] == null) {
	    c[NEXT_STATE] = c.state;
	  }

	  if (type.getDerivedStateFromProps) {
	    c.state = assign({}, c.state, type.getDerivedStateFromProps(c.props, c.state));
	  } else if (isMounting && c.componentWillMount) {
	    c.componentWillMount(); // If the user called setState in cWM we need to flush pending,
	    // state updates. This is the same behaviour in React.

	    c.state = c[NEXT_STATE] !== c.state ? c[NEXT_STATE] : c.state;
	  } else if (!isMounting && c.componentWillUpdate) {
	    c.componentWillUpdate();
	  }

	  if (renderHook) renderHook(vnode);
	  return c.render(c.props, c.state, context);
	}
	/**
	 * Recursively render VNodes to HTML.
	 * @param {VNode|any} vnode
	 * @param {any} context
	 * @param {boolean} isSvgMode
	 * @param {any} selectValue
	 * @param {VNode} parent
	 * @param {boolean} asyncMode
	 * @param {RendererState | undefined} [renderer]
	 * @returns {string | Promise<string> | (string | Promise<string>)[]}
	 */


	function _renderToString(vnode, context, isSvgMode, selectValue, parent, asyncMode, renderer) {
	  // Ignore non-rendered VNodes/values
	  if (vnode == null || vnode === true || vnode === false || vnode === EMPTY_STR) {
	    return EMPTY_STR;
	  }

	  let vnodeType = typeof vnode; // Text VNodes: escape as HTML

	  if (vnodeType != 'object') {
	    if (vnodeType == 'function') return EMPTY_STR;
	    return vnodeType == 'string' ? encodeEntities(vnode) : vnode + EMPTY_STR;
	  } // Recurse into children / Arrays


	  if (isArray(vnode)) {
	    let rendered = EMPTY_STR,
	        renderArray;
	    parent[CHILDREN] = vnode;
	    const vnodeLength = vnode.length;

	    for (let i = 0; i < vnodeLength; i++) {
	      let child = vnode[i];
	      if (child == null || typeof child == 'boolean') continue;

	      const childRender = _renderToString(child, context, isSvgMode, selectValue, parent, asyncMode, renderer);

	      if (typeof childRender == 'string') {
	        rendered = rendered + childRender;
	      } else {
	        if (!renderArray) {
	          renderArray = new Array(vnodeLength);
	        }

	        if (rendered) renderArray.push(rendered);
	        rendered = EMPTY_STR;

	        if (isArray(childRender)) {
	          renderArray.push(...childRender);
	        } else {
	          renderArray.push(childRender);
	        }
	      }
	    }

	    if (renderArray) {
	      if (rendered) renderArray.push(rendered);
	      return renderArray;
	    }

	    return rendered;
	  } // VNodes have {constructor:undefined} to prevent JSON injection:


	  if (vnode.constructor !== undefined) return EMPTY_STR;
	  vnode[PARENT] = parent;
	  if (beforeDiff) beforeDiff(vnode);
	  let type = vnode.type,
	      props = vnode.props; // Invoke rendering on Components

	  if (typeof type == 'function') {
	    let cctx = context,
	        contextType,
	        rendered,
	        component;

	    if (type === preact.Fragment) {
	      // Serialized precompiled JSX.
	      if ('tpl' in props) {
	        let out = EMPTY_STR;

	        for (let i = 0; i < props.tpl.length; i++) {
	          out = out + props.tpl[i];

	          if (props.exprs && i < props.exprs.length) {
	            const value = props.exprs[i];
	            if (value == null) continue; // Check if we're dealing with a vnode or an array of nodes

	            if (typeof value == 'object' && (value.constructor === undefined || isArray(value))) {
	              out = out + _renderToString(value, context, isSvgMode, selectValue, vnode, asyncMode, renderer);
	            } else {
	              // Values are pre-escaped by the JSX transform
	              out = out + value;
	            }
	          }
	        }

	        return out;
	      } else if ('UNSTABLE_comment' in props) {
	        // Fragments are the least used components of core that's why
	        // branching here for comments has the least effect on perf.
	        return '<!--' + encodeEntities(props.UNSTABLE_comment) + '-->';
	      }

	      rendered = props.children;
	    } else {
	      contextType = type.contextType;

	      if (contextType != null) {
	        let provider = context[contextType.__c];
	        cctx = provider ? provider.props.value : contextType.__;
	      }

	      let isClassComponent = type.prototype && typeof type.prototype.render == 'function';

	      if (isClassComponent) {
	        rendered =
	        /**#__NOINLINE__**/
	        renderClassComponent(vnode, cctx);
	        component = vnode[COMPONENT];
	      } else {
	        vnode[COMPONENT] = component =
	        /**#__NOINLINE__**/
	        createComponent(vnode, cctx); // If a hook invokes setState() to invalidate the component during rendering,
	        // re-render it up to 25 times to allow "settling" of memoized states.
	        // Note:
	        //   This will need to be updated for Preact 11 to use internal.flags rather than component._dirty:
	        //   https://github.com/preactjs/preact/blob/d4ca6fdb19bc715e49fd144e69f7296b2f4daa40/src/diff/component.js#L35-L44

	        let count = 0;

	        while (component[DIRTY] && count++ < 25) {
	          component[DIRTY] = false;
	          if (renderHook) renderHook(vnode);
	          rendered = type.call(component, props, cctx);
	        }

	        component[DIRTY] = true;
	      }

	      if (component.getChildContext != null) {
	        context = assign({}, context, component.getChildContext());
	      }

	      if (isClassComponent && preact.options.errorBoundaries && (type.getDerivedStateFromError || component.componentDidCatch)) {
	        // When a component returns a Fragment node we flatten it in core, so we
	        // need to mirror that logic here too
	        let isTopLevelFragment = rendered != null && rendered.type === preact.Fragment && rendered.key == null && rendered.props.tpl == null;
	        rendered = isTopLevelFragment ? rendered.props.children : rendered;

	        try {
	          return _renderToString(rendered, context, isSvgMode, selectValue, vnode, asyncMode, renderer);
	        } catch (err) {
	          if (type.getDerivedStateFromError) {
	            component[NEXT_STATE] = type.getDerivedStateFromError(err);
	          }

	          if (component.componentDidCatch) {
	            component.componentDidCatch(err, EMPTY_OBJ);
	          }

	          if (component[DIRTY]) {
	            rendered = renderClassComponent(vnode, context);
	            component = vnode[COMPONENT];

	            if (component.getChildContext != null) {
	              context = assign({}, context, component.getChildContext());
	            }

	            let isTopLevelFragment = rendered != null && rendered.type === preact.Fragment && rendered.key == null && rendered.props.tpl == null;
	            rendered = isTopLevelFragment ? rendered.props.children : rendered;
	            return _renderToString(rendered, context, isSvgMode, selectValue, vnode, asyncMode, renderer);
	          }

	          return EMPTY_STR;
	        } finally {
	          if (afterDiff) afterDiff(vnode);
	          if (ummountHook) ummountHook(vnode);
	        }
	      }
	    } // When a component returns a Fragment node we flatten it in core, so we
	    // need to mirror that logic here too


	    let isTopLevelFragment = rendered != null && rendered.type === preact.Fragment && rendered.key == null && rendered.props.tpl == null;
	    rendered = isTopLevelFragment ? rendered.props.children : rendered;

	    try {
	      // Recurse into children before invoking the after-diff hook
	      const str = _renderToString(rendered, context, isSvgMode, selectValue, vnode, asyncMode, renderer);

	      if (afterDiff) afterDiff(vnode); // when we are dealing with suspense we can't do this...

	      if (preact.options.unmount) preact.options.unmount(vnode);
	      return str;
	    } catch (error) {
	      if (!asyncMode && renderer && renderer.onError) {
	        let res = renderer.onError(error, vnode, (child, parent) => _renderToString(child, context, isSvgMode, selectValue, parent, asyncMode, renderer));
	        if (res !== undefined) return res;
	        let errorHook = preact.options[CATCH_ERROR];
	        if (errorHook) errorHook(error, vnode);
	        return EMPTY_STR;
	      }

	      if (!asyncMode) throw error;
	      if (!error || typeof error.then != 'function') throw error;

	      const renderNestedChildren = () => {
	        try {
	          return _renderToString(rendered, context, isSvgMode, selectValue, vnode, asyncMode, renderer);
	        } catch (e) {
	          if (!e || typeof e.then != 'function') throw e;
	          return e.then(() => _renderToString(rendered, context, isSvgMode, selectValue, vnode, asyncMode, renderer), renderNestedChildren);
	        }
	      };

	      return error.then(renderNestedChildren);
	    }
	  } // Serialize Element VNodes to HTML


	  let s = '<' + type,
	      html = EMPTY_STR,
	      children;

	  for (let name in props) {
	    let v = props[name];

	    if (typeof v == 'function' && name !== 'class' && name !== 'className') {
	      continue;
	    }

	    switch (name) {
	      case 'children':
	        children = v;
	        continue;
	      // VDOM-specific props

	      case 'key':
	      case 'ref':
	      case '__self':
	      case '__source':
	        continue;
	      // prefer for/class over htmlFor/className

	      case 'htmlFor':
	        if ('for' in props) continue;
	        name = 'for';
	        break;

	      case 'className':
	        if ('class' in props) continue;
	        name = 'class';
	        break;
	      // Form element reflected properties

	      case 'defaultChecked':
	        name = 'checked';
	        break;

	      case 'defaultSelected':
	        name = 'selected';
	        break;
	      // Special value attribute handling

	      case 'defaultValue':
	      case 'value':
	        name = 'value';

	        switch (type) {
	          // <textarea value="a&b"> --> <textarea>a&amp;b</textarea>
	          case 'textarea':
	            children = v;
	            continue;
	          // <select value> is serialized as a selected attribute on the matching option child

	          case 'select':
	            selectValue = v;
	            continue;
	          // Add a selected attribute to <option> if its value matches the parent <select> value

	          case 'option':
	            if (selectValue == v && !('selected' in props)) {
	              s = s + ' selected';
	            }

	            break;
	        }

	        break;

	      case 'dangerouslySetInnerHTML':
	        html = v && v.__html;
	        continue;
	      // serialize object styles to a CSS string

	      case 'style':
	        if (typeof v === 'object') {
	          v = styleObjToCss(v);
	        }

	        break;

	      case 'acceptCharset':
	        name = 'accept-charset';
	        break;

	      case 'httpEquiv':
	        name = 'http-equiv';
	        break;

	      default:
	        {
	          if (NAMESPACE_REPLACE_REGEX.test(name)) {
	            name = name.replace(NAMESPACE_REPLACE_REGEX, '$1:$2').toLowerCase();
	          } else if (UNSAFE_NAME.test(name)) {
	            continue;
	          } else if ((name[4] === '-' || HTML_ENUMERATED.has(name)) && v != null) {
	            // serialize boolean aria-xyz or enumerated attribute values as strings
	            v = v + EMPTY_STR;
	          } else if (isSvgMode) {
	            if (SVG_CAMEL_CASE.test(name)) {
	              name = name === 'panose1' ? 'panose-1' : name.replace(/([A-Z])/g, '-$1').toLowerCase();
	            }
	          } else if (HTML_LOWER_CASE.test(name)) {
	            name = name.toLowerCase();
	          }
	        }
	    } // write this attribute to the buffer


	    if (v != null && v !== false) {
	      if (v === true || v === EMPTY_STR) {
	        s = s + ' ' + name;
	      } else {
	        s = s + ' ' + name + '="' + (typeof v == 'string' ? encodeEntities(v) : v + EMPTY_STR) + '"';
	      }
	    }
	  }

	  if (UNSAFE_NAME.test(type)) {
	    // this seems to performs a lot better than throwing
	    // return '<!-- -->';
	    throw new Error(`${type} is not a valid HTML tag name in ${s}>`);
	  }

	  if (html) ; else if (typeof children === 'string') {
	    // single text child
	    html = encodeEntities(children);
	  } else if (children != null && children !== false && children !== true) {
	    // recurse into this element VNode's children
	    let childSvgMode = type === 'svg' || type !== 'foreignObject' && isSvgMode;
	    html = _renderToString(children, context, childSvgMode, selectValue, vnode, asyncMode, renderer);
	  }

	  if (afterDiff) afterDiff(vnode);
	  if (ummountHook) ummountHook(vnode); // Emit self-closing tag for empty void elements:

	  if (!html && SELF_CLOSING.has(type)) {
	    return s + '/>';
	  }

	  const endTag = '</' + type + '>';
	  const startTag = s + '>';
	  if (isArray(html)) return [startTag, ...html, endTag];else if (typeof html != 'string') return [startTag, html, endTag];
	  return startTag + html + endTag;
	}

	const SELF_CLOSING = new Set(['area', 'base', 'br', 'col', 'command', 'embed', 'hr', 'img', 'input', 'keygen', 'link', 'meta', 'param', 'source', 'track', 'wbr']);

	/* eslint-disable no-var, key-spacing, object-curly-spacing, prefer-arrow-callback, semi, keyword-spacing */
	// function initPreactIslandElement() {
	// 	class PreactIslandElement extends HTMLElement {
	// 		connectedCallback() {
	// 			var d = this;
	// 			if (!d.isConnected) return;
	// 			let i = this.getAttribute('data-target');
	// 			if (!i) return;
	// 			var s,
	// 				e,
	// 				c = document.createNodeIterator(document, 128);
	// 			while (c.nextNode()) {
	// 				let n = c.referenceNode;
	// 				if (n.data == 'preact-island:' + i) s = n;
	// 				else if (n.data == '/preact-island:' + i) e = n;
	// 				if (s && e) break;
	// 			}
	// 			if (s && e) {
	// 				requestAnimationFrame(() => {
	// 					var p = e.previousSibling;
	// 					while (p != s) {
	// 						if (!p || p == s) break;
	// 						e.parentNode.removeChild(p);
	// 						p = e.previousSibling;
	// 					}
	// 					c = s;
	// 					while (d.firstChild) {
	// 						s = d.firstChild;
	// 						d.removeChild(s);
	// 						c.after(s);
	// 						c = s;
	// 					}
	// 					d.parentNode.removeChild(d);
	// 				});
	// 			}
	// 		}
	// 	}
	// 	customElements.define('preact-island', PreactIslandElement);
	// }
	// To modify the INIT_SCRIPT, uncomment the above code, modify it, and paste it into https://try.terser.org/.
	const INIT_SCRIPT = `class e extends HTMLElement{connectedCallback(){var e=this;if(!e.isConnected)return;let t=this.getAttribute("data-target");if(t){for(var r,a,i=document.createNodeIterator(document,128);i.nextNode();){let e=i.referenceNode;if(e.data=="preact-island:"+t?r=e:e.data=="/preact-island:"+t&&(a=e),r&&a)break}r&&a&&requestAnimationFrame((()=>{for(var t=a.previousSibling;t!=r&&t&&t!=r;)a.parentNode.removeChild(t),t=a.previousSibling;for(i=r;e.firstChild;)r=e.firstChild,e.removeChild(r),i.after(r),i=r;e.parentNode.removeChild(e)}))}}}customElements.define("preact-island",e);`;
	function createInitScript() {
	  return `<script>(function(){${INIT_SCRIPT}}())</script>`;
	}
	/**
	 * @param {string} id
	 * @param {string} content
	 * @returns {string}
	 */

	function createSubtree(id, content) {
	  return `<preact-island hidden data-target="${id}">${content}</preact-island>`;
	}

	/**
	 * @param {VNode} vnode
	 * @param {RenderToChunksOptions} options
	 * @returns {Promise<void>}
	 */

	async function renderToChunks(vnode, {
	  context,
	  onWrite,
	  abortSignal
	}) {
	  context = context || {};
	  /** @type {RendererState} */

	  const renderer = {
	    start: Date.now(),
	    abortSignal,
	    onWrite,
	    onError: handleError,
	    suspended: []
	  }; // Synchronously render the shell
	  // @ts-ignore - using third internal RendererState argument

	  const shell = renderToString(vnode, context, renderer);
	  onWrite(shell); // Wait for any suspended sub-trees if there are any

	  const len = renderer.suspended.length;

	  if (len > 0) {
	    onWrite('<div hidden>');
	    onWrite(createInitScript()); // We should keep checking all promises

	    await forkPromises(renderer);
	    onWrite('</div>');
	  }
	}

	async function forkPromises(renderer) {
	  if (renderer.suspended.length > 0) {
	    const suspensions = [...renderer.suspended];
	    await Promise.all(renderer.suspended.map(s => s.promise));
	    renderer.suspended = renderer.suspended.filter(s => !suspensions.includes(s));
	    await forkPromises(renderer);
	  }
	}
	/** @type {RendererErrorHandler} */


	function handleError(error, vnode, renderChild) {
	  if (!error || !error.then) return; // walk up to the Suspense boundary

	  while (vnode = vnode[PARENT]) {
	    let component = vnode[COMPONENT];

	    if (component && component[CHILD_DID_SUSPEND]) {
	      break;
	    }
	  }

	  if (!vnode) return;
	  const id = vnode.__v;
	  const found = this.suspended.find(x => x.id === id);
	  const race = new Deferred();
	  const abortSignal = this.abortSignal;

	  if (abortSignal) {
	    // @ts-ignore 2554 - implicit undefined arg
	    if (abortSignal.aborted) race.resolve();else abortSignal.addEventListener('abort', race.resolve);
	  }

	  const promise = error.then(() => {
	    if (abortSignal && abortSignal.aborted) return;
	    const child = renderChild(vnode.props.children, vnode);
	    if (child) this.onWrite(createSubtree(id, child));
	  }, // TODO: Abort and send hydration code snippet to client
	  // to attempt to recover during hydration
	  this.onError);
	  this.suspended.push({
	    id,
	    vnode,
	    promise: Promise.race([promise, race.promise])
	  });
	  const fallback = renderChild(vnode.props.fallback);
	  return found ? '' : `<!--preact-island:${id}-->${fallback}<!--/preact-island:${id}-->`;
	}

	/**
	 * @typedef {object} RenderToPipeableStreamOptions
	 * @property {() => void} [onShellReady]
	 * @property {() => void} [onAllReady]
	 * @property {(error) => void} [onError]
	 */

	/**
	 * @typedef {object} PipeableStream
	 * @property {() => void} abort
	 * @property {(writable: import('stream').Writable) => void} pipe
	 */

	/**
	 * @param {import('preact').VNode} vnode
	 * @param {RenderToPipeableStreamOptions} options
	 * @param {any} [context]
	 * @returns {PipeableStream}
	 */

	function renderToPipeableStream(vnode, options, context) {
	  const encoder = new TextEncoder('utf-8');
	  const controller = new AbortController();
	  const stream = new node_stream.PassThrough();
	  renderToChunks(vnode, {
	    context,
	    abortSignal: controller.signal,
	    onError: error => {
	      if (options.onError) {
	        options.onError(error);
	      }

	      controller.abort(error);
	    },

	    onWrite(s) {
	      stream.write(encoder.encode(s));
	    }

	  }).then(() => {
	    options.onAllReady && options.onAllReady();
	    stream.end();
	  }).catch(error => {
	    stream.destroy();

	    if (options.onError) {
	      options.onError(error);
	    } else {
	      throw error;
	    }
	  });
	  Promise.resolve().then(() => {
	    options.onShellReady && options.onShellReady();
	  });
	  return {
	    /**
	     * @param {unknown} [reason]
	     */
	    abort(reason = new Error('The render was aborted by the server without a reason.')) {
	      controller.abort();
	      stream.destroy();

	      if (options.onError) {
	        options.onError(reason);
	      }
	    },

	    /**
	     * @param {import("stream").Writable} writable
	     */
	    pipe(writable) {
	      stream.pipe(writable, {
	        end: true
	      });
	    }

	  };
	}

	exports.renderToPipeableStream = renderToPipeableStream;

})));
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