Allain Lalonde Allain Lalonde - 5 months ago 21
Javascript Question

Getting a list of statics on an ES6 class

Given an ES6 class, how can I inspect it to determine its gettable static properties and methods?

In ES5 determining the statics attached to a class (it's constructor) was as simple as iterating over the properties of the function. In ES6, is appears there is some magic going on that doesn't expose them as such.


Yes, all methods of classes are non-enumerable by default.

You still can iterate them using Object.getOwnPropertyNames. Filter out .prototype, .name and .length (or just everything that is not a function). To include inherited static methods, you will have to walk the prototype chain explicitly (using Object.getPrototypeOf).