ReactJs: Best JavaScript Frameworks 2019


ReactJs JavaScript Frameworks

ReactJs JavaScript Frameworks basically is an open-source JavaScript library which is used for building user interfaces specifically for single page applications.  It’s used for handling view layer for web and mobile apps. Before you start to use this library you’ve to get good knowledge about the HTML, JavaScript, CSS & DOM (Document Object Model)

Also Check Query’s Contains JavaScript

React Js Getting Started

React Directly in HTML

The easiest way start learning React is expressed below

Start by including three scripts, the first two let us write React code in our JavaScripts, and the third, Babel, allows us to write JSX syntax and ES6 in older browsers.

Example of ReactJs JavaScript Frameworks

Adding three CDN’s in your HTML file:

<!DOCTYPE html>
<html>
  <script src="https://unpkg.com/react@16/umd/react.production.min.js"></script>
  <script src="https://unpkg.com/react-dom@16/umd/react-dom.production.min.js"></script>
  <script src="https://unpkg.com/babel-standalone@6.15.0/babel.min.js"></script>
  <body>
  
    <div id="mydiv"></div>

    <script type="text/babel">
      class Hello extends React.Component {
        render() {
          return <h1>Hello World!</h1>
        }
      }
    </script>
  </body>

</html>

What is ES6?

ES6 stands for ECMAScript 6.

ECMAScript was created to standardize JavaScript, and ES6 is the 6th version of ECMAScript, it was published in 2015, and is also known as ECMAScript 2015.


Why Should I Learn ES6?

React uses ES6, and you should be familiar with some of the new features like:

  • Classes
  • Arrow Functions
  • Variables (let, const, var)

ES6 introduced classes.

A class is a type of function, but instead of using the keyword function to initiate it, we use the keyword class, and the properties is assigned inside a constructor() method.


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