Redux is a predictable state container for JavaScript apps.

• Redux helps manage the state of an application in a predictable way

• It provides a central store for all the state of the application

• React components can access the state from the store using the connect() function

• Actions are dispatched to the store to update the state

• Reducers are pure functions that update the state based on the dispatched actions

Unmounting logic can be implemented using useEffect hook with a return statement.

• Use useEffect hook with a return statement to implement unmounting logic

• Return a function from useEffect hook to execute cleanup logic

• Cleanup logic can include clearing intervals, removing event listeners, etc.

DOCTYPE declaration in HTML specifies the version of HTML being used in the document.

• DOCTYPE declaration is placed at the very beginning of an HTML document before the tag.

• It informs the web browser about the version of HTML being used, which helps in rendering the page correctly.

• It also helps in triggering the browser's standards mode, ensuring consistent display across different browsers.

• Example: specifies the document is using HTML5.

External CSS and JavaScript files can be included in an HTML document using link and script tags respectively.

• Use the tag with the rel attribute set to 'stylesheet' to include external CSS files.

• Example:

• Use the

HTML is a markup language used to create the structure of web pages.

• HTML stands for HyperText Markup Language

• It is used to define the structure of content on a web page using elements like

  ,

  ,

  , etc.

• HTML tags are used to enclose content and provide instructions on how it should be displayed

• It is the backbone of web development and works in conjunction with CSS and JavaScript

Life cycle methods can be used in functional components using React Hooks.

• Use useEffect() hook to mimic componentDidMount(), componentDidUpdate() and componentWillUnmount() methods.

• Use useState() hook to manage state in functional components.

• Use useContext() hook to access context in functional components.

• Use useReducer() hook to manage complex state in functional components.

HTML tags and attributes are used to structure and define content on a web page.

• HTML tags are used to define different elements on a web page such as headings, paragraphs, images, links, etc.

• Attributes provide additional information about an element and are used to modify the behavior or appearance of the element.

• For example, the tag is used to display an image on a web page, and the 'src' attribute is used to specify the image file location.

HTML is a fundamental building block of web development, used to create the structure of web pages.

• HTML stands for HyperText Markup Language.

• It is used to create the structure of web pages by using elements like , , ,

  ,

  , etc.

• HTML is essential for creating content on the web and is often combined with CSS for styling and JavaScript for interactivity.

• It provides a way to organize and format content on a webpage, making it accessible and user-friendly.

• HTML5 is the latest versio...read more

CSS is crucial for styling and formatting web pages, enhancing user experience and creating visually appealing designs.

• CSS is used to control the layout, colors, fonts, and overall appearance of a website.

• It allows for responsive design, making websites adapt to different screen sizes and devices.

• CSS can be used to create animations, transitions, and interactive elements on a webpage.

• Without CSS, web pages would be plain and lack visual appeal, making it harder for users to n...read more

The basic structure of an HTML document includes the doctype declaration, html tag, head tag, and body tag.

• DOCTYPE declaration specifies the version of HTML being used

• HTML tag contains the entire HTML document

• Head tag includes meta information, title, and links to external resources

• Body tag contains the content of the webpage