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| App.js | |
| const Pet = ([name, animal, breed]) => { | |
| return React.createElement('div', {}, [ | |
| React.createElement('h1', {}, name), | |
| React.createElement('h2', {}, animal), | |
| React.createElement('h2', {}, breed) | |
| ]); | |
| }; | |
| const App = () => { | |
| return React.createElement('div', { id: 'something-important' }, [ | |
| React.createElement('h1', {}, 'Adopt Me!'), | |
| React.createElement(Pet, { | |
| name: 'Luna', | |
| animal: 'Dog', | |
| breed: 'Donkey' | |
| }), | |
| React.createElement(Pet, { | |
| name: 'Pipper', | |
| animal: 'Bird', | |
| breed: 'Cockatiel' | |
| }), | |
| React.createElement(Pet, { | |
| name: 'Jimmy', | |
| animal: 'Cat', | |
| breed: 'Rottweiler' | |
| }) | |
| ]); | |
| }; | |
| ReactDOM.render(React.createElement(App), document.getElementById('root')); | |
| Index.html is: | |
| <!DOCTYPE html> | |
| <html lang="en"> | |
| <head> | |
| <meta charset="UTF-8" /> | |
| <meta name="viewport" content="width=device-width, initial-scale=1.0" /> | |
| <meta http-equiv="X-UA-Compatible" content="ie=edge" /> | |
| <title>Document</title> | |
| <link rel="stylesheet" href="./style.css" /> | |
| </head> | |
| <body> | |
| <div id="root">not rendered</div> | |
| <script src="https://unpkg.com/react@16.8.4/umd/react.development.js"></script> | |
| <script src="https://unpkg.com/react-dom@16.8.4/umd/react-dom.development.js"></script> | |
| <script src="App.js"></script> | |
| </body> | |
| </html> | |
| Error is: Download the React DevTools for a better development experience: https://fb.me/react-devtoolsYou might need to use a local HTTP server (instead of file://): https://fb.me/react-devtools-faq | |
| react.development.js:276 Warning: Each child in a list should have a unique "key" prop. | |
| Check the render method of `App`. See https://fb.me/react-warning-keys for more information. | |
| in h1 (created by App) | |
| in App | |
| warningWithoutStack @ react.development.js:276 | |
| warning @ react.development.js:1791 | |
| validateExplicitKey @ react.development.js:2886 | |
| validateChildKeys @ react.development.js:2908 | |
| createElementWithValidation @ react.development.js:3041 | |
| App @ App.js:10 | |
| renderWithHooks @ react-dom.development.js:13027 | |
| mountIndeterminateComponent @ react-dom.development.js:15109 | |
| beginWork @ react-dom.development.js:15714 | |
| performUnitOfWork @ react-dom.development.js:19401 | |
| workLoop @ react-dom.development.js:19441 | |
| renderRoot @ react-dom.development.js:19524 | |
| performWorkOnRoot @ react-dom.development.js:20431 | |
| performWork @ react-dom.development.js:20343 | |
| performSyncWork @ react-dom.development.js:20317 | |
| requestWork @ react-dom.development.js:20186 | |
| scheduleWork @ react-dom.development.js:20000 | |
| scheduleRootUpdate @ react-dom.development.js:20661 | |
| updateContainerAtExpirationTime @ react-dom.development.js:20689 | |
| updateContainer @ react-dom.development.js:20746 | |
| ReactRoot.render @ react-dom.development.js:21042 | |
| (anonymous) @ react-dom.development.js:21179 | |
| unbatchedUpdates @ react-dom.development.js:20548 | |
| legacyRenderSubtreeIntoContainer @ react-dom.development.js:21175 | |
| render @ react-dom.development.js:21244 | |
| (anonymous) @ App.js:30 | |
| 3App.js:1 Uncaught TypeError: undefined is not a function | |
| at Pet (App.js:1) | |
| at renderWithHooks (react-dom.development.js:13027) | |
| at mountIndeterminateComponent (react-dom.development.js:15109) | |
| at beginWork (react-dom.development.js:15714) | |
| at performUnitOfWork (react-dom.development.js:19401) | |
| at workLoop (react-dom.development.js:19441) | |
| at HTMLUnknownElement.callCallback (react-dom.development.js:143) | |
| at Object.invokeGuardedCallbackDev (react-dom.development.js:193) | |
| at invokeGuardedCallback (react-dom.development.js:250) | |
| at replayUnitOfWork (react-dom.development.js:18667) | |
| Pet @ App.js:1 | |
| renderWithHooks @ react-dom.development.js:13027 | |
| mountIndeterminateComponent @ react-dom.development.js:15109 | |
| beginWork @ react-dom.development.js:15714 | |
| performUnitOfWork @ react-dom.development.js:19401 | |
| workLoop @ react-dom.development.js:19441 | |
| callCallback @ react-dom.development.js:143 | |
| invokeGuardedCallbackDev @ react-dom.development.js:193 | |
| invokeGuardedCallback @ react-dom.development.js:250 | |
| replayUnitOfWork @ react-dom.development.js:18667 | |
| renderRoot @ react-dom.development.js:19557 | |
| performWorkOnRoot @ react-dom.development.js:20431 | |
| performWork @ react-dom.development.js:20343 | |
| performSyncWork @ react-dom.development.js:20317 | |
| requestWork @ react-dom.development.js:20186 | |
| scheduleWork @ react-dom.development.js:20000 | |
| scheduleRootUpdate @ react-dom.development.js:20661 | |
| updateContainerAtExpirationTime @ react-dom.development.js:20689 | |
| updateContainer @ react-dom.development.js:20746 | |
| ReactRoot.render @ react-dom.development.js:21042 | |
| (anonymous) @ react-dom.development.js:21179 | |
| unbatchedUpdates @ react-dom.development.js:20548 | |
| legacyRenderSubtreeIntoContainer @ react-dom.development.js:21175 | |
| render @ react-dom.development.js:21244 | |
| (anonymous) @ App.js:30 | |
| 3react-dom.development.js:17206 The above error occurred in the <Pet> component: | |
| in Pet (created by App) | |
| in div (created by App) | |
| in App | |
| Consider adding an error boundary to your tree to customize error handling behavior. | |
| Visit https://fb.me/react-error-boundaries to learn more about error boundaries. | |
| logCapturedError @ react-dom.development.js:17206 | |
| logError @ react-dom.development.js:17242 | |
| update.callback @ react-dom.development.js:18154 | |
| callCallback @ react-dom.development.js:16522 | |
| commitUpdateEffects @ react-dom.development.js:16561 | |
| commitUpdateQueue @ react-dom.development.js:16552 | |
| commitLifeCycles @ react-dom.development.js:17472 | |
| commitAllLifeCycles @ react-dom.development.js:18825 | |
| callCallback @ react-dom.development.js:143 | |
| invokeGuardedCallbackDev @ react-dom.development.js:193 | |
| invokeGuardedCallback @ react-dom.development.js:250 | |
| commitRoot @ react-dom.development.js:19037 | |
| (anonymous) @ react-dom.development.js:20507 | |
| unstable_runWithPriority @ react.development.js:735 | |
| completeRoot @ react-dom.development.js:20506 | |
| performWorkOnRoot @ react-dom.development.js:20435 | |
| performWork @ react-dom.development.js:20343 | |
| performSyncWork @ react-dom.development.js:20317 | |
| requestWork @ react-dom.development.js:20186 | |
| scheduleWork @ react-dom.development.js:20000 | |
| scheduleRootUpdate @ react-dom.development.js:20661 | |
| updateContainerAtExpirationTime @ react-dom.development.js:20689 | |
| updateContainer @ react-dom.development.js:20746 | |
| ReactRoot.render @ react-dom.development.js:21042 | |
| (anonymous) @ react-dom.development.js:21179 | |
| unbatchedUpdates @ react-dom.development.js:20548 | |
| legacyRenderSubtreeIntoContainer @ react-dom.development.js:21175 | |
| render @ react-dom.development.js:21244 | |
| (anonymous) @ App.js:30 | |
| react-dom.development.js:20401 Uncaught TypeError: undefined is not a function | |
| at Pet (App.js:1) | |
| at renderWithHooks (react-dom.development.js:13027) | |
| at mountIndeterminateComponent (react-dom.development.js:15109) | |
| at beginWork (react-dom.development.js:15714) | |
| at performUnitOfWork (react-dom.development.js:19401) | |
| at workLoop (react-dom.development.js:19441) | |
| at renderRoot (react-dom.development.js:19524) | |
| at performWorkOnRoot (react-dom.development.js:20431) | |
| at performWork (react-dom.development.js:20343) | |
| at performSyncWork (react-dom.development.js:20317) | |
| Pet @ App.js:1 | |
| renderWithHooks @ react-dom.development.js:13027 | |
| mountIndeterminateComponent @ react-dom.development.js:15109 | |
| beginWork @ react-dom.development.js:15714 | |
| performUnitOfWork @ react-dom.development.js:19401 | |
| workLoop @ react-dom.development.js:19441 | |
| renderRoot @ react-dom.development.js:19524 | |
| performWorkOnRoot @ react-dom.development.js:20431 | |
| performWork @ react-dom.development.js:20343 | |
| performSyncWork @ react-dom.development.js:20317 | |
| requestWork @ react-dom.development.js:20186 | |
| scheduleWork @ react-dom.development.js:20000 | |
| scheduleRootUpdate @ react-dom.development.js:20661 | |
| updateContainerAtExpirationTime @ react-dom.development.js:20689 | |
| updateContainer @ react-dom.development.js:20746 | |
| ReactRoot.render @ react-dom.development.js:21042 | |
| (anonymous) @ react-dom.development.js:21179 | |
| unbatchedUpdates @ react-dom.development.js:20548 | |
| legacyRenderSubtreeIntoContainer @ react-dom.development.js:21175 | |
| render @ react-dom.development.js:21244 | |
| (anonymous) @ App.js:30 |
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