How to use as placeholder using React Intl?

Posted by Prem Tiwari | Updated on | ReactJS interview


How to use as placeholder using React Intl? The components from react-intl return elements, not plain text, so they can’t be used for placeholders, alt text, etc. In that case, you should use lower level …

What are the main features of React Intl?

Posted by Prem Tiwari | Updated on | ReactJS interview


What are the main features of React Intl? Below are the main features of React Intl, Display numbers with separators. Display dates and times correctly. Display dates relative to “now”. Pluralize labels in strings. Support …

What is React Intl?

Posted by Prem Tiwari | Updated on | ReactJS interview


What is React Intl? The React Intl library makes internalization in React straightforward, with off-the-shelf components and an API that can handle everything from formatting strings, dates, and numbers, to pluralization. React Intl is part …

How to implement default or NotFound page?

Posted by Prem Tiwari | Updated on | ReactJS interview


How to implement default or NotFound page? A renders the first child that matches. A with no path always matches. So you just need to simply drop path attribute as below:

How to get query parameters in React Router v4?

Posted by Prem Tiwari | Updated on | ReactJS interview


How to get query parameters in React Router v4? The ability to parse query strings was taken out of React Router v4 because there have been user requests over the years to support different implementation. …

What is the purpose of push() and replace() methods of history?

Posted by Prem Tiwari | Updated on | ReactJS interview


What is the purpose of push() and replace() methods of history? A history instance has two methods for navigation purpose. push() replace() If you think of the history as an array of visited locations, push() will add a new location to the …

What are the components of React Router v4?

Posted by Prem Tiwari | Updated on | ReactJS interview


What are the components of React Router v4? React Router v4 provides below 3 <Router> components: <BrowserRouter> <HashRouter> <MemoryRouter> The above components will create browser, hash, and memory history instances. React Router v4 makes the properties and methods of the history instance associated …

How React Router is different from history library?

Posted by Editorial Staff | Updated on | ReactJS interview


How React Router is different from history library? React Router is a wrapper around the history library which handles interaction with the browser’s window.history with its browser and hash histories. It also provides memory history …

What is React Router?

Posted by Andre Scott | Updated on | ReactJS interview


What is React Router? React Router is a powerful routing library built on top of React that helps you add new screens and flows to your application incredibly quickly, all while keeping the URL in …

What are render props?

Posted by Editorial Staff | Updated on | ReactJS interview


What are render props? Render Props is a simple technique for sharing code between components using a prop whose value is a function. The below component uses render prop which returns a React element. Libraries …

How to make AJAX call and in which component lifecycle methods should I make an AJAX call?

Posted by Prem Tiwari | Updated on | ReactJS interview


How to make AJAX call and in which component lifecycle methods should I make an AJAX call? You can use AJAX libraries such as Axios, jQuery AJAX, and the browser built-in fetch. You should fetch …

What are the popular React-specific linters?

Posted by Prem Tiwari | Updated on | ReactJS interview


What are the popular React-specific linters? ESLint is a popular JavaScript linter. There are plugins available that analyse specific code styles. One of the most common for React is an npm package called eslint-plugin-react. By …

How to define constants in React?

Posted by Prem Tiwari | Updated on | ReactJS interview


How to define constants in React? You can use ES7 static field to define constant.

Why is a component constructor called only once?

Posted by Prem Tiwari | Updated on | ReactJS interview


Why is a component constructor called only once? React’s reconciliation algorithm assumes that without any information to the contrary, if a custom component appears in the same place on subsequent renders, it’s the same component …

How to import and export components using React and ES6?

Posted by Prem Tiwari | Updated on | ReactJS interview


How to import and export components using React and ES6? You should use default for exporting the components: With the export specifier, the MyProfile is going to be the member and exported to this module …