JavaScript (based on react)

Variable Declaration

Const and let: representing constants and variables, respectively

Template String

Const User = ' World';

Console. log (' Hello ${user}'); //Hello World

Default parameters

function Span class= "Pl-en" >logactivity ( Span class= "Pl-smi" >activity Span class= "pl-k" >= " Skiing "{

　　Console. log (activity);

}

logactivity (); //Skiing

Arrow functions

[1, 2, 3]. Map (x = x + 1); //[2, 3, 4]

Import and Export of modules

Introduction of all     ' dva';

Introduction of some     ' dva'; 

Introduce all and act as icon object as   icons'./icon';  

Export the default   App;

Partial export, requires import {App} from './file '; Introducing   App extend Component {};

JavaScript (based on react)