Category: reactjs

React renders twice your component and hooks or useEffect 0

React renders twice your component and hooks or useEffect

From : https://stackoverflow.com/questions/58603209/react-hooks-render-twice It's an intentional feature of the StrictMode. This only happens in development, and helps find accidental side effects put into the render phase. We only do this for components with Hooks...

Jest in React Expected ref to be a function, a string, an object returned by React.createRef(), or null. 0

Jest in React Expected ref to be a function, a string, an object returned by React.createRef(), or null.

Expected ref to be a function, a string, an object returned by React.createRef(), or null. Code test('MultipleFormAggregator to prevent an invalid form submit two times in a row', () => {   const formAggregatorRef = useRef<MultipleFormAggregatorRef>(null);   const component = renderer.create(     <div>       <MultipleFormAggregator ref={formAggregatorRef} />     </div>,   );  (...) }); Solution Create a jig, dont use ref in your...

React jest typescript SyntaxError: Unexpected token 0

React jest typescript SyntaxError: Unexpected token

Solution Add "@babel/typescript" to your project as well as in the babel.config.js file : module.exports = {   presets: [     '@babel/preset-env',     '@babel/preset-react',     "@babel/typescript",   ],   plugins: [     "@babel/plugin-proposal-export-default-from",   ], };

Support for the experimental syntax 'exportDefaultFrom' isn't currently enabled 0

Support for the experimental syntax 'exportDefaultFrom' isn't currently enabled

SyntaxError: C:\dev\mx4d-ui\src\js\component\multiple-form-aggregator.tsx: Support for the experimental syntax 'exportDefaultFrom' isn't currently enabled (5:8): 3 | import { log } from 'src/js/service/logger'; 4 | > 5 | export interface FormAggregatorClientInterface { Solution Install npm package @babel/plugin-proposal-export-default-from $...

Error downloading packages nodejs-10.23.0-1nodesource.x86_64: [Errno 256] No more mirrors to try. 0

Error downloading packages nodejs-10.23.0-1nodesource.x86_64: [Errno 256] No more mirrors to try.

(8/18): docker-ce-cli-20.10.1-3.el7.x86_64.rpm | 33 MB 00:00:01 (9/18): mock-core-configs-33.3-1.el7.noarch.rpm | 59 kB 00:00:00 nodejs-10.23.0-1nodesource.x86 FAILED MB 00:00:05 ETA https://rpm.nodesource.com/pub_10.x/el/7/x86_64/nodejs-10.23.0-1nodesource.x86_64.rpm: [Errno -1] Package does not match intended download. Suggestion: run yum --enablerepo=nodesource clean metadata Trying other...

Component definition is missing display name  react/display-name 0

Component definition is missing display name react/display-name

This can happen when you use forwardRef() in React on your own function component. Component definition is missing display name  react/display-name   Solution interface IsSavedProps {   className?: string; } export interface IsSavedRef {   show: () => void; } export const RebootIsSaved = forwardRef((props: IsSavedProps, ref: Ref<IsSavedRef>) => {    const { className, ...rest } = props; (...)   const show = () => {     isSavedTask();...

ERROR in ./node_modules/bindings/bindings.js Module not found 0

ERROR in ./node_modules/bindings/bindings.js Module not found

ERROR in ./node_modules/bindings/bindings.js Module not found: Error: Can't resolve 'fs' in 'C:\dev\angular-electron\node_modules\bindings' ERROR in ./node_modules/bindings/bindings.js Module not found: Error: Can't resolve 'path' in 'C:\dev\angular-electron\node_modules\bindings' ERROR in ./node_modules/file-uri-to-path/index.js Module not found: Error: Can't resolve 'path'...