Default props are props that are assigned default values in a React component. These default values are used if the prop is not passed to the component from the parent or if it is passed as undefined. Default props are defined using the defaultProps property on the component class.

Windowing is a technique used in React to optimize performance when rendering a large data set. Windowing involves rendering only a subset of the data that is currently visible on the screen, and dynamically rendering additional data as the user scrolls or interacts with the UI. This technique can significantly improve the performance of applications that need to render large amounts of data, such as tables, lists, and grids.

In React, you can apply validation to props using the PropTypes library. PropTypes allow you to define the type and shape of a component's props, which helps catch errors and bugs early in development.

To add multiple middlewares to Redux, you can use the applyMiddleware() function provided by the Redux library. This function takes an arbitrary number of middleware functions as arguments and returns a single function that can be passed to the createStore() function. The applyMiddleware() function applies the middleware functions to the store in the order they are provided.

React Router is a higher-level abstraction on top of the history library. It provides a declarative API for routing and navigation in React applications, and manages the browser history and URL updates. The history library, on the other hand, is a low-level library that provides a simple interface for manipulating the browser history, and can be used directly in non-React applications.

Hooks in React can replace both render props and higher order components in some cases. Hooks can provide similar functionality to both of these patterns, while also simplifying the code and making it more reusable. For example, the "useEffect" Hook can replace the "componentDidMount" and "componentDidUpdate" lifecycle methods, as well as some uses of higher order components.

React-Intl is a library for internationalization (i18n) in React applications. It provides a set of components, utilities, and formatting functions to handle different languages, locales, and cultural conventions. With React-Intl, you can easily translate text, format dates and numbers, and manage pluralization and gender.

In React, there are several rules for naming components, including that components must start with a capital letter, use camelCase convention, and can include numbers, but not as the first character. Components should also have a descriptive name that reflects their purpose or function in the application.

The recommended ordering of methods in a React component class is as follows: constructor, render, lifecycle methods, event handlers. This ordering groups related methods together and makes it easier to understand and maintain the code.

In React, you can programmatically trigger a click event by using the "simulate()" method in the "react-test-renderer" package. This method allows you to simulate a click event on a React component, and can be useful for testing or automation purposes. For example: TestRenderer.act(() => { buttonInstance.simulate('click'); });.