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How to implement guide with react testing library not firing event handlers on dynamically rendered components

πŸ‘€ Views: 2855 πŸ’¬ Answers: 1 πŸ“… Created: 2025-06-04
react testing-library react-testing-library javascript

I've searched everywhere and can't find a clear answer. I'm working with an scenario with React Testing Library where event handlers do not seem to be firing on components that are rendered conditionally based on a state change. I have a simple component that displays a button, and when clicked, it shows a list of items. However, when I try to simulate the button click in my test, the event handler does not seem to trigger, and the expected changes in the document are not made. Here's a minimal version of my component: ```javascript import React, { useState } from 'react'; const MyComponent = () => { const [showList, setShowList] = useState(false); const items = ['Item 1', 'Item 2', 'Item 3']; return ( <div> <button onClick={() => setShowList(!showList)}>Toggle List</button> {showList && <ul>{items.map(item => <li key={item}>{item}</li>)}</ul>} </div> ); }; export default MyComponent; ``` And here’s the test I wrote using React Testing Library: ```javascript import React from 'react'; import { render, screen, fireEvent } from '@testing-library/react'; import MyComponent from './MyComponent'; test('it toggles the list', () => { render(<MyComponent />); const button = screen.getByText(/Toggle List/i); fireEvent.click(button); const listItem = screen.getByText(/Item 1/i); expect(listItem).toBeInTheDocument(); }); ``` However, when I run this test, I get the following behavior: ``` TestingLibraryElementError: Unable to find an element with the text: Item 1 ``` I've made sure to import everything correctly and I'm using React Testing Library version 12.1.5. I've tried wrapping the `fireEvent.click` in `act()` but that didn’t help. Am I missing something in how I handle the state change or simulating the click? Any insights would be greatly appreciated! Thanks, I really appreciate it! I'm coming from a different tech stack and learning Javascript. What would be the recommended way to handle this?