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Class in ES6 is syntax sugar; because class in es6 is based on prototype inheritance, it has no impact on the function of the language, but facilitates grammar writing and reading; the essence of class is function, which can make the writing of object prototypes clearer and more like the syntax of object-oriented programming.

This tutorial operating environment: windows10 system, ECMAScript version 6. 0, Dell G3 computer.

Is class in ES6 grammatical or grammatical sugar?

In ES6, class (class) is introduced as a template for objects, and classes can be defined through the class keyword.

The essence of class is function.

It can be seen as a syntax candy, making the object prototype written more clearly and more like the syntax of object-oriented programming.

Its class is different from other languages, it is still based on the implementation of prototype inheritance, does not affect the function of the language, but facilitates your writing and reading.

Basic usage

Class expressions can be anonymous or named.

/ / anonymous class let Example = class {constructor (a) {this.a = a;}} / / named class let Example = class Example {constructor (a) {this.a = a;}}

Class declaration

Class Example {constructor (a) {this.a = a;}}

Note: do not repeat the statement.

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