React Questions

Binding in the constructor: this.handleClick = this.handleClick.bind(this)

Using an arrow function in the callback: onClick={() => this.handleClick()}

Using addEventListener directly on the DOM element

Directly passing the method: onClick={this.handleClick}

By using componentDidMount instead

By not passing a dependency array

By wrapping the useEffect call in a conditional statement

By passing an empty array [] as the second argument to useEffect

To handle user interactions

To break down the UI into independent, reusable pieces

To directly manipulate the DOM

To manage application state

To help React efficiently update and re-render lists.

To give each element a unique identifier for styling purposes.

To associate event handlers with specific elements.

To define the order in which elements should be displayed.

Enhanced control over form data and validation.

Simplified state management with reduced boilerplate code.

Seamless integration with external libraries for form handling.

Direct manipulation of the DOM for improved performance.

Controlled components are suitable for simple forms, while uncontrolled components are ideal for complex forms.

Controlled components are deprecated in React, and uncontrolled components are the recommended approach.

Controlled components directly manipulate the DOM, while uncontrolled components use React's state management.

Controlled components rely on React's state management for form data, while uncontrolled components use DOM references.

<img></>

<img></img>

It relies on the browser to manage form data.

It uses external libraries for form handling.

It maintains its own internal state for form data.

It directly manipulates the DOM to update form values.

const Welcome = () => { ... };

class Welcome extends React.Component { ... }

let Welcome = (props) => { ... }

function Welcome(props) { ... }

To prevent default browser behavior for all events

To allow passing custom arguments to event handlers

To ensure that this refers to the correct component instance inside event handlers

Event binding is not necessary in React; it's an older JavaScript concept.