In essence, lazy loading means that a component or a part of code must get loaded when it is required. It is also referred to as code splitting and data fetching . Talking about React specifically, it bundles the complete code and deploys all of it at the same time.
Indeed, What is triple dot in ReactJS?
(three dots in JavaScript) is called the Spread Syntax or Spread Operator. This allows an iterable such as an array expression or string to be expanded or an object expression to be expanded wherever placed.
Then, Why Webpack is used in React? Webpack is a popular module bundling system built on top of Node. js. It can handle not only combination and minification of JavaScript and CSS files, but also other assets such as image files (spriting) through the use of plugins.
What is Babel in React? Babel is a JavaScript compiler that includes the ability to compile JSX into regular JavaScript.
In the same way What are the limitations of React? Disadvantage of ReactJS
- The high pace of development. The high pace of development has an advantage and disadvantage both. …
- Poor Documentation. It is another cons which are common for constantly updating technologies. …
- View Part. ReactJS Covers only the UI Layers of the app and nothing else. …
- JSX as a barrier.
What is rest parameter in JavaScript?
The rest parameter syntax allows a function to accept an indefinite number of arguments as an array, providing a way to represent variadic functions in JavaScript.
What is spread operator in ReactJS?
The JavaScript spread operator ( … ) allows us to quickly copy all or part of an existing array or object into another array or object.
What is dollar in JavaScript?
The dollar sign ($) and the underscore (_) characters are JavaScript identifiers, which just means that they identify an object in the same way a name would. The objects they identify include things such as variables, functions, properties, events, and objects.
What is use of Redux in react JS?
React Redux is the official React binding for Redux. It allows React components to read data from a Redux Store, and dispatch Actions to the Store to update data. Redux helps apps to scale by providing a sensible way to manage state through a unidirectional data flow model. React Redux is conceptually simple.
What is Webpack and Babel?
Babel is a transpiler for ES6 to ES5, so that browser can understand the JS. Webpack is a bundler for JS and other files that creates bundled file that the users browser can download.
What is Webpack and Babel in react JS?
@babel /preset-react: compiles the React code into ES5 code. d. babel-loader: a Webpack helper that transforms your JavaScript dependencies with Babel (i.e. will transform the import statements into require ones)
What is JSX and Babel?
JSX is an extension to JavaScript which allows us to write XML-like syntax to define DOM elements, which are translated by Babel into vanilla JS. Webpack is responsible for bundling all of our components together and running a local development server to test our code in the browser.
What are hooks in react JS?
Hooks are a new addition in React 16.8. They let you use state and other React features without writing a class. Hooks are backwards-compatible.
What is difference between Reactjs and React native?
While Reactjs is basically a JavaScript library and React Native is the entire framework, the former is the heart of the latter, and compliments each other. If Reactjs is optimal for creating apps with high functionality and complex calculations, then React Native is ideal to give a native feeling to your mobile apps.
What are the benefits of React?
Key benefits of react js for front-end development
- Speed. …
- Flexibility. …
- Performance. …
- Usability. …
- Reusable Components. …
- It’s easy to learn. …
- It helps to build rich user interfaces. …
- It allows writing custom components.
What is arrow function in JavaScript?
Arrow function is one of the features introduced in the ES6 version of JavaScript. It allows you to create functions in a cleaner way compared to regular functions. For example, This function // function expression let x = function(x, y) { return x * y; }
What is curry in JavaScript?
In other terms, currying is when a function — instead of taking all arguments at one time — takes the first one and returns a new function, which takes the second one and returns a new function, which takes the third one, etc. until all arguments are completed.
What is callback function in JavaScript?
A callback function is a function passed into another function as an argument, which is then invoked inside the outer function to complete some kind of routine or action.
What is object Destructuring in JS?
Destructuring is a JavaScript expression that allows us to extract data from arrays, objects, and maps and set them into new, distinct variables. Destructuring allows us to extract multiple properties, or items, from an array at a time.
What is Destructuring in JavaScript?
The destructuring assignment syntax is a JavaScript expression that makes it possible to unpack values from arrays, or properties from objects, into distinct variables.
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