React Typescript Material-UI useStyles not callable
you can solve it by importing from ‘@mui/styles’ import { makeStyles, createStyles } from ‘@mui/styles’;
reactjs
Check type of React component
This is what you should do: import MyComponent from ‘./MyComponent’; this.props.children.forEach(child => { if (child.type === MyComponent) { console.log(‘This child is <MyComponent />’); } });
Material UI v5: TypeError: Cannot read properties of undefined (reading ‘create’)
Just ran into this myself. You can import createTheme from @mui/material/styles or @mui/system, but they do slightly different things: You can use the utility coming from the @mui/system package, or if you are using @mui/material, you can import it from @mui/material/styles. The difference is in the default theme that is used (if no theme is … Read more
Using ‘styled()’ MUI System utility with additional props (Typescript)
You can add the generic type parameter to the returned function of styled like this: type InputProps = { width: number } const InputField = styled(‘input’)<InputProps>(({ width }) => ({ width: width }));
Re-render component when navigating the stack with React Navigation
If you are using React Navigation 5.X, just do the following: import { useIsFocused } from ‘@react-navigation/native’ export default function App(){ const isFocused = useIsFocused() useEffect(() => { if(isFocused){ //Update the state you want to be updated } }, [isFocused]) } The useIsFocused hook checks whether a screen is currently focused or not. It returns … Read more
Decode Jwt token React
It seems like you are using JWT. To decode this type of token you can simply use jwt-decode library. For example, in ReactJS: import { jwtDecode } from ‘jwt-decode’ // import dependency // If using v3 or earlier, use this instead: // import jwtDecode from ‘jwt-decode’ // import dependency // some logic axios.post(`${axios.defaults.baseURL}/auth`, { email, … Read more
Pressing enter to submit form in react-testing-library does not work
The following worked for me: import userEvent from “@testing-library/user-event”; import { render } from “@testing-library/react”; test(“should submit when pressing enter”, () => { const handleSubmit = jest.fn(); const { getByLabelText } = render(<App handleSubmit={handleSubmit} />); const input = getByLabelText(“Name:”); userEvent.type(input, “abc{enter}”); expect(handleSubmit).toHaveBeenCalled(); });
EACCES: permission denied, unlink
First of all, you need to check permission by running the command: ls -la ~/.config/yarn/global/node_modules/.yarn* I received the next response: -rw-r–r– 1 root staff 15163 Jul 18 15:17 ~/.config/yarn/global/node_modules/.yarn-integrity Then if you saw that root had permission, but you don’t have, you should add permission to yourself: sudo chown -R ${USER} ~/.config/yarn/
jest.mock() doesn’t work inside tests, only outside tests
Use mockReturnValue(…) import { getCallingCode, hasSupport, } from ‘utils/countryCallingCode’ jest.mock(‘utils/countryCallingCode’, () => ({ getCallingCode: jest.fn(), hasSupport: jest.fn(), })) describe(‘…’, () => { it(‘…’, () => { getCallingCode.mockReturnValue(1) hasSupport.mockReturnValue(false) expect(… }) it(‘…’, () => { getCallingCode.mockReturnValue(0) hasSupport.mockReturnValue(true) expect(… }) }) Dealing with default export from that util: import theUtil from ‘utils/theUtil’ jest.mock(‘utils/theUtil’, () => ({ __esModule: … Read more