javascript - ES6 equivalent of the following pattern? -

i want use static class properties (stage-0) in es6 classes -

class button {   static size = {     small: "small",     big: "big"   } }  class uilibrary {   consturctor() {     this.button = new button();   } }  // can't access static properties of class instance :( const librarya = new uilibrary(); console.log(librarya.button.size.small); 

what best alternative this?

edit:

this question not creating class properties in es6/7 supported in stage-0, nor creating static methods. looking find pattern allows attaching of enum-like objects class instances. hence none of duplicate question suggestions valid.

i can't access static properties of class instance :(

yes, if static properties need access them on constructor:

console.log(button.size.small); console.log(librarya.button.constructor.size.small); 

(see here discussion of differences)

i looking find pattern allows attaching of enum-like objects class instances.

if want them available on instances, don't make them static:

class button {   // without experimental syntax, assignment in constructor   size = {     small: "small",     big: "big"   } } 

or, instead of dropping static keyword, put them on prototype object isn't recreated on , over:

class button {} button.prototype.size = {   small: "small",   big: "big" }; 

or maybe shouldn't put them enum on class @ all, , use named exports of es6 module.