React is a view library by facebook. The easiest way to get started with it using jsfiddle. Here we will have a look at writing a simple Hello world in react.
The following code will render “Hello World!” inside
ReactDOM.render( <h1>Hello World!</h1>, document.getElementById("main") )
The HTML like syntax you see is called JSX. It is just syntactic sugar for the following code.
ReactDOM.render( React.createElement( "h1", null, "Hello World!" ), document.getElementById("main") );
JSX can be compiled to JS using tools like babel.