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When we use a hook after a condition that may return a value, we get the error "Rendered fewer hooks than expected. This may be caused by an accidental early return statement". To fix this error, you need to move all React hooks to any condition that ...

When we use the useState hook conditionally or after a condition that may return a value, we get the error "React hook 'useState' is called conditionally". To fix the error, move all React hooks above any condition that may return a value....

Use non-null assertions or type assertions to resolve the React.js error "Argument of type 'HTMLElement | null' is not assignable to parameter of type 'Element | DocumentFragment'", for example `const root = createRoot(rootElement!)`....

When we forget to close a tag in the JSX code, the React.js error “Expected corresponding JSX closing tag” appears. To fix the error, you need to use self-closing tags, such as and ensure the order of opening and closing tags in the JSX code....

There are several reasons for the error “createRoot(...): Target container is not a DOM element” in React: Passing an incorrect id to the document.getElementById() method....

To resolve the error "Module not found: Error: Can't resolve 'react-bootstrap'", make sure to install the react-bootstrap package by opening a terminal in the root directory of the project and running the command `npm install react-bootstrap bootstrap...

In React, the error “Attempted import error 'X' is not exported from” in React.js occurs when we try to import a named import that does not exist in the specified file. To fix the error, make sure the module has named exports and you have not obfu...

When we try to use `default import` to import from a module that does not have a `default export`, we get a "does not contain a default export" error. To fix the error, make sure the module has named exports and wrap the import in curly braces, e.g....

When using React, we must have come across control components and event handlers. We need to use `.bind()` in the constructor of the custom component to bind these methods to the component instance. As shown in the following code:...

In the process of React development, we often encounter some errors. Here we look at an error reported in App.js. The error is as follows: App.js:69 Uncaught TypeError: Cannot read properties of undefined (reading 'setState') at onInput...

Usually, the child components of a React component are a group, that is, the child components are an array. Introduction to Type of the Children Props....

Props validation is a very useful way to use components correctly. It can avoid many bugs and problems as your application becomes more and more complex. In addition, it can make your program more readable....

React's Props anti-pattern, using Props to generate state in getInitialState is an anti-pattern - Anti-Pattern....

React transfers Props. Props are generated when components are encapsulated. Components expose some properties (Props) to the outside world to complete some functions....

The "Cannot read property 'props' of undefined" error occurs when a class method is called without binding the correct context to the this keyword. To resolve this error, define the class method as an arrow function or use the bind method in the class...