Podcast
Questions and Answers
What is a React component?
What is a React component?
Props are mutable values passed from a parent component to a child component.
Props are mutable values passed from a parent component to a child component.
False
What is the purpose of the state object in a React component?
What is the purpose of the state object in a React component?
To store data that can change within a component
In React, event handlers are functions that are called when an _______ occurs.
In React, event handlers are functions that are called when an _______ occurs.
Signup and view all the answers
What is the purpose of the useState hook in React?
What is the purpose of the useState hook in React?
Signup and view all the answers
Synthetic events in React provide a inconsistent interface across different browsers.
Synthetic events in React provide a inconsistent interface across different browsers.
Signup and view all the answers
Match the following concepts with their descriptions:
Match the following concepts with their descriptions:
Signup and view all the answers
What is the difference between functional components and class components in React?
What is the difference between functional components and class components in React?
Signup and view all the answers
Study Notes
Components
- Building blocks of a React application
- Reusable pieces of code that represent a part of the UI
- Can be either functional or class components
- Functional components: pure functions that take in props and return JSX
- Class components: classes that extend the
React.Componentclass
Props
- Short for "properties"
- Immutable values passed from a parent component to a child component
- Used to customize the behavior of a component
- Can be any type of data (string, number, object, etc.)
- Passed as an object to the component, with each key-value pair being a prop
- Example: ``
State
- An object that stores data that can change within a component
- Used to store data that is specific to a component and can change over time
- Initialized in the component's constructor or with a state hook (
useState) - Can be updated using the
setStatemethod or theuseStatehook - When state changes, the component is re-rendered with the new state
Event Handling
- A way to respond to user interactions (e.g. clicks, hover, keyboard input)
- In React, event handling is done using event handlers
- Event handlers are functions that are called when an event occurs
- Event handlers are passed as props to components
- Example:
console.log("Button clicked!")}>Click me! - Synthetic events: React's way of handling events, which provides a consistent interface across different browsers
React Components
- Building blocks of a React application, reusable pieces of code that represent a part of the UI
- Can be either functional or class components
- Functional components: pure functions that take in props and return JSX
- Class components: classes that extend the
React.Componentclass
Props
- Short for "properties", immutable values passed from a parent component to a child component
- Used to customize the behavior of a component
- Can be any type of data (string, number, object, etc.)
- Passed as an object to the component, with each key-value pair being a prop
State
- An object that stores data that can change within a component
- Used to store data that is specific to a component and can change over time
- Initialized in the component's constructor or with a state hook (
useState) - Can be updated using the
setStatemethod or theuseStatehook - When state changes, the component is re-rendered with the new state
Event Handling
- A way to respond to user interactions (e.g. clicks, hover, keyboard input)
- In React, event handling is done using event handlers
- Event handlers are functions that are called when an event occurs
- Event handlers are passed as props to components
- Synthetic events: React's way of handling events, which provides a consistent interface across different browsers
Studying That Suits You
Use AI to generate personalized quizzes and flashcards to suit your learning preferences.
Description
Understand the building blocks of a React application, including reusable code components and props, which are immutable values passed from a parent to a child component.
