Safer JavaScript Object Composition With Traits and Traits.js

Mixins while awesome have some limitations. In particular, conflicting mixin methods and properties are overwritten when using Object.assign. Moreover, you don’t get any warning when this happens. Updating a mixin with new functionality at some later point in time can inadvertently change the behavior of some of your objects. Traits offer a solution to this problem by providing a safer and more structured way to do object composition.