Every React Concept Explained in 12 Minutes
Code Bootcamp・2 minutes read
React components are the building blocks of apps, using JSX instead of HTML for dynamic values and requiring only one parent element. Props pass data between components, children prop allows component composition, and key prop differentiates components in lists, managed efficiently with the virtual DOM and hooks like useState and useEffect.
Insights
- Components in React are JavaScript functions returning JSX elements, serving as the visible parts like buttons or inputs, while JSX allows dynamic JavaScript values in attributes.
- Props facilitate data transfer between components, with the children prop enabling component composition, and the key prop ensuring unique identification in lists, all managed efficiently by React through the virtual DOM and event handling with hooks like useState and useEffect.
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Recent questions
What are React components?
Functional building blocks of React apps.
What is the purpose of props in React?
To pass data between components.
How does React handle lists of components?
Using the key prop for unique identification.
What is the significance of the children prop in React?
Allows passing components as props.
How does React manage events and state?
Through event handling and hooks like useState and useEffect.
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Summary
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Essential React Components and Props Guide
- Components are the building blocks of every React app, functioning as the visible parts like buttons or inputs, created as JavaScript functions that return JSX.
- JSX, or JavaScript in Disguise, is used in React components instead of HTML markup, allowing dynamic JavaScript values in attributes using curly braces.
- React components can only return one parent element, necessitating the use of a React fragment to avoid adding unnecessary elements to the page.
- Props are used to pass data between components, created by assigning a name and value to a component, accessible in the component it's passed to.
- The children prop allows passing components as props, useful for composition to organize React components optimally.
- The key prop in React is used to differentiate components in a list, ensuring unique identification for each component.
- React renders components using the virtual DOM, updating it efficiently before reconciling changes with the real DOM, managing events through event handling and state with hooks like useState and useEffect.
