- What is difference between Const let and VAR types?
- What is let in react?
- What does 3 dots mean in react?
- Is JSX compiled?
- What is Babel in react?
- What is difference between JS and JSX in react?
- Can’t use const react?
- Is JSX required for react?
- Can I use JSX without react?
- Is Let hoisted?
- Why JSX is used in react?
- What is state in react?
- Why const is used in react?
- Is JSX only for react?
- What are refs in react?
- What is redux in react?
What is difference between Const let and VAR types?
var declarations are globally scoped or function scoped while let and const are block scoped.
var variables can be updated and re-declared within its scope; let variables can be updated but not re-declared; const variables can neither be updated nor re-declared.
They are all hoisted to the top of their scope..
What is let in react?
The let statement declares a block-scoped local variable, optionally initializing it to a value.
What does 3 dots mean in react?
Spread OperatorsThree dots … represents Spread Operators or Rest Parameters, It allows an array expression or string or anything which can be iterating to be expanded in places where zero or more arguments for function calls or elements for array are expected.
Is JSX compiled?
What is Babel in react?
What is difference between JS and JSX in react?
Can’t use const react?
you can’t declare addToCart with let or const because you are not dealing with functions inside a class but class methods(much similar to the object. since arrow function syntax doesn’t have any this perspective on it’s own, u can simply use it.
Is JSX required for react?
Can I use JSX without react?
However, we can actually use JSX without React, and it’s not that difficult either. The way React works is by configuring your bundler to convert JSX into calls to a createElement function. … However, most bundlers allow you to choose your own JSX pragma (function that will be in the place of React.
Is Let hoisted?
Why JSX is used in react?
What is state in react?
What is state? The heart of every React component is its “state”, an object that determines how that component renders & behaves. In other words, “state” is what allows you to create components that are dynamic and interactive.
Why const is used in react?
const is a signal that the variable won’t be reassigned. const does not indicate that a value is ‘constant’ or immutable. ES6 const and let are hoisted too. Although the identifiers has the same memory reference from compile time, they cannot be accessed before declaration in the code.
Is JSX only for react?
While you don’t have to use JSX when writing React (or use React in order to try JSX), there’s no denying it is an important part of the React ecosystem, so let’s dive in and see what’s going on under the hood.
What are refs in react?
Refs are a function provided by React to access the DOM element and the React element that you might have created on your own. They are used in cases where we want to change the value of a child component, without making use of props and all.
What is redux in react?
React Hooks and other methods For features used across the application, we can simply add JS files to head using the