algolia · sarahdayan · May 10, 2022 · May 9, 2022 · May 9, 2022 · May 9, 2022
diff --git a/.eslintignore b/.eslintignore
@@ -8,3 +8,4 @@ examples/twitter-compose-with-typeahead
 examples/slack-with-emojis-and-commands
 examples/react-instantsearch-hooks
 examples/vue-instantsearch
+examples/react-18
diff --git a/examples/react-18/.env.example b/examples/react-18/.env.example
@@ -0,0 +1 @@
+SKIP_PREFLIGHT_CHECK=true
diff --git a/examples/react-18/.gitignore b/examples/react-18/.gitignore
@@ -0,0 +1,23 @@
+# See https://help.github.com/articles/ignoring-files/ for more about ignoring files.
+
+# dependencies
+/node_modules
+/.pnp
+.pnp.js
+
+# testing
+/coverage
+
+# production
+/build
+
+# misc
+.DS_Store
+.env.local
+.env.development.local
+.env.test.local
+.env.production.local
+
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
diff --git a/examples/react-18/README.md b/examples/react-18/README.md
@@ -0,0 +1,32 @@
+# Autocomplete with React 18 example
+
+This example shows how to integrate Autocomplete with [React 18](https://reactjs.org/blog/2022/03/29/react-v18.html).
+
+## Demo
+
+[Access the demo](https://codesandbox.io/s/github/algolia/autocomplete/tree/next/examples/react-18)
+
+## How to run this example locally
+
+### 1. Clone this repository
+
+```sh
+git clone [email protected]:algolia/autocomplete.git
+```
+
+### 2. Install the dependencies and run the server
+
+```sh
+yarn
+yarn workspace @algolia/autocomplete-example-react-18 start
+```
+
+Alternatively, you may use npm:
+
+```sh
+cd examples/react-18
+npm install
+npm start
+```
+
+Open <http://localhost:3000> to see your app.
diff --git a/examples/react-18/package.json b/examples/react-18/package.json
@@ -0,0 +1,42 @@
+{
+  "name": "@algolia/autocomplete-example-react-18",
+  "description": "Autocomplete example with React 18",
+  "version": "1.6.2",
+  "private": true,
+  "license": "MIT",
+  "scripts": {
+    "start": "react-scripts start",
+    "build": "react-scripts build"
+  },
+  "dependencies": {
+    "@algolia/autocomplete-js": "1.6.2",
+    "@algolia/autocomplete-theme-classic": "1.6.2",
+    "algoliasearch": "4.9.1",
+    "react": "^18.1.0",
+    "react-dom": "^18.1.0"
+  },
+  "devDependencies": {
+    "@algolia/client-search": "4.9.1",
+    "@types/react": "^18.0.0",
+    "@types/react-dom": "^18.0.0",
+    "react-scripts": "4.0.3",
+    "typescript": "^4.4.2"
+  },
+  "eslintConfig": {
+    "extends": [
+      "react-app"
+    ]
+  },
+  "browserslist": {
+    "production": [
+      ">0.2%",
+      "not dead",
+      "not op_mini all"
+    ],
+    "development": [
+      "last 1 chrome version",
+      "last 1 firefox version",
+      "last 1 safari version"
+    ]
+  }
+}
diff --git a/examples/react-18/public/favicon.png b/examples/react-18/public/favicon.png
diff --git a/examples/react-18/public/index.html b/examples/react-18/public/index.html
@@ -0,0 +1,14 @@
+<!DOCTYPE html>
+<html lang="en">
+  <head>
+    <meta charset="utf-8" />
+    <link rel="icon" href="%PUBLIC_URL%/favicon.png" />
+    <meta name="viewport" content="width=device-width, initial-scale=1" />
+    <meta name="theme-color" content="#000000" />
+    <title>React 18 | Autocomplete</title>
+  </head>
+  <body>
+    <noscript>You need to enable JavaScript to run this app.</noscript>
+    <div id="root"></div>
+  </body>
+</html>
diff --git a/examples/react-18/src/App.tsx b/examples/react-18/src/App.tsx
@@ -0,0 +1,113 @@
+import { useEffect, useRef, createElement, Fragment } from 'react';
+import { createRoot } from 'react-dom/client';
+import { autocomplete, getAlgoliaResults } from '@algolia/autocomplete-js';
+import algoliasearch from 'algoliasearch/lite';
+
+import type { AutocompleteComponents } from '@algolia/autocomplete-js';
+import type { Hit } from '@algolia/client-search';
+import type { Root } from 'react-dom/client';
+
+import '@algolia/autocomplete-theme-classic';
+
+const appId = 'latency';
+const apiKey = '6be0576ff61c053d5f9a3225e2a90f76';
+const searchClient = algoliasearch(appId, apiKey);
+
+type ProductHit = Hit<{
+  brand: string;
+  categories: string[];
+  description: string;
+  image: string;
+  name: string;
+  price: number;
+  rating: number;
+  type: string;
+  url: string;
+}>;
+
+export default function App() {
+  const containerRef = useRef<HTMLDivElement | null>(null);
+  const panelRootRef = useRef<Root | null>(null);
+  const rootRef = useRef<HTMLElement | null>(null);
+
+  useEffect(() => {
+    if (!containerRef.current) {
+      return undefined;
+    }
+
+    const search = autocomplete<ProductHit>({
+      container: containerRef.current,
+      placeholder: 'Search',
+      getSources({ query }) {
+        return [
+          {
+            sourceId: 'products',
+            getItems() {
+              return getAlgoliaResults<ProductHit>({
+                searchClient,
+                queries: [
+                  {
+                    indexName: 'instant_search',
+                    query,
+                  },
+                ],
+              });
+            },
+            templates: {
+              item({ item, components }) {
+                return <ProductItem hit={item} components={components} />;
+              },
+              noResults() {
+                return 'No products matching.';
+              },
+            },
+          },
+        ];
+      },
+      renderer: { createElement, Fragment, render: () => {} },
+      render({ children }, root) {
+        if (!panelRootRef.current || rootRef.current !== root) {
+          rootRef.current = root;
+
+          panelRootRef.current?.unmount();
+          panelRootRef.current = createRoot(root);
+        }
+
+        panelRootRef.current.render(children);
+      },
+    });
+
+    return () => {
+      search.destroy();
+    };
+  }, []);
+
+  return <div ref={containerRef} />;
+}
+
+type ProductItemProps = {
+  hit: ProductHit;
+  components: AutocompleteComponents;
+};
+
+function ProductItem({ hit, components }: ProductItemProps) {
+  return (
+    <div className="aa-ItemWrapper">
+      <div className="aa-ItemContent">
+        <div className="aa-ItemIcon aa-ItemIcon--picture aa-ItemIcon--alignTop">
+          <img src={hit.image} alt={hit.name} width="40" height="40" />
+        </div>
+
+        <div className="aa-ItemContentBody">
+          <div className="aa-ItemContentTitle">
+            <components.Highlight hit={hit} attribute="name" />
+          </div>
+          <div className="aa-ItemContentDescription">
+            By <strong>{hit.brand}</strong> in{' '}
+            <strong>{hit.categories[0]}</strong>
+          </div>
+        </div>
+      </div>
+    </div>
+  );
+}
diff --git a/examples/react-18/src/index.tsx b/examples/react-18/src/index.tsx
@@ -0,0 +1,14 @@
+import React from 'react';
+import ReactDOM from 'react-dom/client';
+import App from './App';
+
+import './styles.css';
+
+const root = ReactDOM.createRoot(
+  document.getElementById('root') as HTMLElement
+);
+root.render(
+  <React.StrictMode>
+    <App />
+  </React.StrictMode>
+);
diff --git a/examples/react-18/src/react-app-env.d.ts b/examples/react-18/src/react-app-env.d.ts
@@ -0,0 +1 @@
+/// <reference types="react-scripts" />
diff --git a/examples/react-18/src/styles.css b/examples/react-18/src/styles.css
@@ -0,0 +1,20 @@
+* {
+  box-sizing: border-box;
+}
+
+body {
+  background-color: rgb(244, 244, 249);
+  color: rgb(65, 65, 65);
+  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Roboto", "Oxygen",
+    "Ubuntu", "Cantarell", "Fira Sans", "Droid Sans", "Helvetica Neue",
+    sans-serif;
+  -webkit-font-smoothing: antialiased;
+  -moz-osx-font-smoothing: grayscale;
+  padding: 1rem;
+}
+
+.container {
+  margin: 0 auto;
+  max-width: 640px;
+  width: 100%;
+}
diff --git a/examples/react-18/tsconfig.json b/examples/react-18/tsconfig.json
@@ -0,0 +1,26 @@
+{
+  "compilerOptions": {
+    "target": "es5",
+    "lib": [
+      "dom",
+      "dom.iterable",
+      "esnext"
+    ],
+    "allowJs": true,
+    "skipLibCheck": true,
+    "esModuleInterop": true,
+    "allowSyntheticDefaultImports": true,
+    "strict": true,
+    "forceConsistentCasingInFileNames": true,
+    "noFallthroughCasesInSwitch": true,
+    "module": "esnext",
+    "moduleResolution": "node",
+    "resolveJsonModule": true,
+    "isolatedModules": true,
+    "noEmit": true,
+    "jsx": "react-jsx"
+  },
+  "include": [
+    "src"
+  ]
+}
diff --git a/packages/autocomplete-js/src/__tests__/renderer.test.ts b/packages/autocomplete-js/src/__tests__/renderer.test.ts
@@ -431,6 +431,7 @@ describe('renderer', () => {
         '\nTo get rid of this warning, do any of the following depending on your use case.' +
         "\n- If you are using the `render` option only to override Autocomplete's default `render` function, pass the `render` function into `renderer` and remove the `render` option." +
         '\n- If you are using the `render` option to customize the layout, pass your `render` function into `renderer` and use it from the provided parameters of the `render` option.' +
+        '\n- If you are using the `render` option to work with React 18, pass an empty `render` function into `renderer`.' +
         '\nSee https://www.algolia.com/doc/ui-libraries/autocomplete/api-reference/autocomplete-js/autocomplete/#param-render'
     );
 
@@ -475,6 +476,45 @@ describe('renderer', () => {
     }).not.toWarnDev();
   });
 
+  test('does not warn at all when passing an empty `renderer.render` function', () => {
+    const container = document.createElement('div');
+    const panelContainer = document.createElement('div');
+    const CustomFragment = (props: any) => props.children;
+    const mockCreateElement = jest.fn().mockImplementation(preactCreateElement);
+
+    document.body.appendChild(panelContainer);
+
+    expect(() => {
+      autocomplete<{ label: string }>({
+        container,
+        panelContainer,
+        initialState: {
+          isOpen: true,
+        },
+        getSources() {
+          return [
+            {
+              sourceId: 'testSource',
+              getItems() {
+                return [{ label: '1' }];
+              },
+              templates: {
+                item({ item }) {
+                  return item.label;
+                },
+              },
+            },
+          ];
+        },
+        renderer: {
+          createElement: mockCreateElement,
+          Fragment: CustomFragment,
+          render: () => {},
+        },
+      });
+    }).not.toWarnDev();
+  });
+
   test('does not warn at all when not passing a custom renderer', () => {
     const container = document.createElement('div');
     const panelContainer = document.createElement('div');

diff --git a/packages/autocomplete-js/src/getDefaultOptions.ts b/packages/autocomplete-js/src/getDefaultOptions.ts
@@ -107,6 +107,7 @@ export function getDefaultOptions<TItem extends BaseItem>(
       `\nTo get rid of this warning, do any of the following depending on your use case.` +
       "\n- If you are using the `render` option only to override Autocomplete's default `render` function, pass the `render` function into `renderer` and remove the `render` option." +
       '\n- If you are using the `render` option to customize the layout, pass your `render` function into `renderer` and use it from the provided parameters of the `render` option.' +
+      '\n- If you are using the `render` option to work with React 18, pass an empty `render` function into `renderer`.' +
       '\nSee https://www.algolia.com/doc/ui-libraries/autocomplete/api-reference/autocomplete-js/autocomplete/#param-render'
   );
 

diff --git a/packages/autocomplete-js/src/types/AutocompleteRenderer.ts b/packages/autocomplete-js/src/types/AutocompleteRenderer.ts
@@ -5,19 +5,14 @@ export type Pragma = (
 ) => JSX.Element;
 export type PragmaFrag = any;
 
-type ComponentChild =
-  | VNode<any>
-  | object
-  | string
-  | number
-  | boolean
-  | null
-  | undefined;
+type ComponentChild = VNode<any> | string | number | boolean | null | undefined;
+
 type ComponentChildren = ComponentChild[] | ComponentChild;
 
-export type VNode<TProps = any> = {
+export type VNode<TProps = {}> = {
   type: any;
-  props: TProps & { children: ComponentChildren; key?: any };
+  key: string | number | any;
+  props: TProps & { children: ComponentChildren };
 };
 
 export type Render = (