ECMAScript 6
ECMAScript 6 (hereinafter referred to as ES6) is the next generation standard JavaScript language, has been officially released in June 2015.
Mozilla Corporation will be based on this standard, the introduction of JavaScript 2.0.
ECMAScript and JavaScript, in the end what is the relationship? Many beginners will feel confused, simply,
ECMAScript is the international standard JavaScript language, JavaScript is the realization of ECMAScript.
Its goal is to enable JavaScript language can be used to write large complex applications, enterprise-class development language.
Contrast look at the difference between the ES5 and ES6
1. Declare Variable Scope
Global variables declared in es5
Var variable declaration in the presence of es5 coverage phenomenon
return 
es6 let in variable declarations are local scope
es6 in const declaration is constant, the statement can not be modified once
Returned an error: Constants can not be changed Uncaught TypeError: Assignment to constant variable.
2. template string
es5 - very complicated, a bunch of symbols splicing
es6 - Anti quotes can be resolved
3. function point
es5 pointers to functions is the current object
Arrow pointing function is windows, and arguments can not be used
So if in the actual production, a function of the change point occurs, there is often inconvenient, so there is another way to create
1 "Create a literal way:
Back to Results
2 "monomer mode:
return
4. Create Object
es5 create objects, tedious, poor readability
Es6 create objects in the way, using the concept of class Class
